[Botany • 2026] Argyreia elegans (Convolvulaceae) • A New Species from Northern Thailand

  

Argyreia elegans Traiperm, Tetsana & Chitchak,

in Chitchak, Tetsana, Srisombat et Traiperm, 2026. 

พู่ม่วงดิสสกุล  ||  DOI: doi.org/10.3390/taxonomy6010006 

Abstract

Argyreia elegans Traiperm, Tetsana & Chitchak, sp. nov., from northern Thailand is described and illustrated. The new species resembles A. kerrii Craib but differs in terms of having lanceolate to oblong leaves, up to two inflorescences (each bearing 1–3 flowers emerging from an axillary bud), and outer sepals that are densely velvety-pubescent on the abaxial side. A detailed description, an updated key to the species for the Flora of Thailand, as well as anatomical, micromorphological, and taxonomic notes are provided.

Keywords: biodiversity; Chiang Mai; conservation; new species; Flora of Thailand; species complex; morning glory

 Argyreia elegans Traiperm, Tetsana & Chitchak, sp. nov.—habit, inflorescence, and corolla.
 (A) Flowering branch showing inflorescence with side view of corolla and leaf shape. (B) Front view of flower and the abaxial surface of leaf with pale green color. (C) Flower in back-side angle, showing bract attachment and their undulation and calyx. (D) Flowering branch showing pairs of inflorescences emerging from axillary buds (red arrowheads).

(voucher: N. Tetsana et al. 1904) Photographs (A–C) by N. Tetsana; (D) by N. Chitchak.

  Argyreia elegans Traiperm, Tetsana & Chitchak, sp. nov.
 (A) Flowering branch. (B) Leaf shapes. (C) Leaf apex. (D) Adaxial surface of leaf. (E) Abaxial surface of leaf. (F) Bracts. (G) Sepals from outer (upper row from left to right) to innermost (lower row from left to right). (H) Opened corolla. (I) Single stamen in the adaxial view (left) and lateral view (right) showing the attachment point to corolla. (J) Close-up of lower part of stamen, showing trichomes at the filament base. (K) Multicellular uniseriate hair with a single apical gland. (L) Pistil composed of bi-globose stigmas with nectary disc surrounding ovary.

 All drawn by N. Chitchak from voucher specimens N. Tetsana et al. 1904 (BKF).

 Argyreia elegans Traiperm, Tetsana & Chitchak, sp. nov., with its two most morphologically similar species in Thailand, A. kerrii and A. ankylophlebia; a comparison of leaves, inflorescences, bracts, and sepals.
(A,B) A. elegans. (C–E) A. kerrii. (F–H) A. ankylophlebia.
(A,C,F) Leaves. (B,D,G) Inflorescences. (B,E,H) Close-up of inflorescences showing details of bracts and sepals.

Photographs (A,B) by N. Tetsana; (C–H) by P. Traiperm.

Argyreia elegans Traiperm, Tetsana & Chitchak, sp. nov.

Diagnosis. Similar to Argyreia kerrii in having a purple tubular-funnelform corolla, but differs in its lanceolate to oblong leaf shape (versus ovate or broadly ovate), 1–2 inflorescences emerging from an axillary bud (versus strictly 1 inflorescence), and inflorescences containing 1–3 flowers (versus several flowers); outer sepals densely velvet pubescence abaxially (versus abaxial side appressed pilose medially or glabrous).

Etymology. The specific epithet refers to the beautiful flower with its perfectly shaped and eye-catching colored corolla.

Vernacular name. Phu Muang Dissakul (พู่ม่วงดิสสกุล); the name is given by the authors to honor Mr. Dissakul Thammasanukul, the former Chief of the Om Koi Wildlife Sanctuary.

Natthaphong Chitchak, Naiyana Tetsana, Poompat Srisombat and Paweena Traiperm. 2026. A New Argyreia Lour. (Convolvulaceae) from Northern Thailand. Taxonomy. 6(1), 6; DOI: doi.org/10.3390/taxonomy6010006 [2 January 2026]

[Botany • 2025] Bonamia minima (Convolvulaceae) • A New Species from Brazil, with notes on leaf anatomy and pollen morphology

 Bonamia minima A.L.C.Moreira & Faria,  

in Moreira, Faria, Cunha Neto, Mata et Zanatta, 2025.

 https://rheedea.in/journal/ftH8cFXW 

 Researchgate.net/publication/394678526

 

Abstract

A new species of Convolvulaceae, Bonamia minima A.L.C. Moreira & Faria, is described and illustrated based on a collection made in 2012 from a region of high diversity in the Central Plateau of Brazil, in campo rupestre. The new species is most similar to B. austinii A.L.C.Moreira & Sim.-Bianch., the only congener with which it shares the combination of sericeous indumentum and bifurcate trichomes on the leaves. It can be distinguished from this species mainly by characteristics of the gynoecium, presenting a completely glabrous ovary. Details of its habitat, distribution, phenology, conservation status, and micromorphological aspects of the leaf and pollen are provided, along with a comparison to the most similar species.

Keywords: Campo rupestre, Cerrado, Neotropical biodiversity, Savannah, subshrub, Taxonomy

 Bonamia minima A.L.C.Moreira & Faria sp. nov.:
a. Habit; b. Leaf-adaxial surface; b1. Leaf-abaxial surface; c. Flower-lateral view; d. Sepals; e. Corolla with stamen, longitudinal section; f. Stamen; g. Pollen grain; h. Gynoecium; i. Stigma

(drawn from the holotype by MC)

 Bonamia minima A.L.C.Moreira & Faria sp. nov.:
a. Habit; b. Flower-lateral view; b1. Sepals; c. Flower-frontal view; d. Stamen; e. Polar view of pollen grain (SEM); f. Style; f1. Stigma under scanning electron microscopy; g. Branch

(Photos by H. Moreira. (A, B, C e G; Designed by JV).

Bonamia minima A.L.C. Moreira & Faria, sp. nov. 

 Closely related to B. austinii A.L.C. Moreira & Sim.-Bianch. (Moreira et al. 2018) (Fig. 2, 3) by presenting short elliptic petiolate leaf and axillary inflorescence with white corolla but differing by its glabrous ovary, style with equal size and stigma fully globose. Bonamia austinii has an ovary with a hairy apex, styles of different sizes and globose to reniform stigmas.

Etymology: The specific epithet minima, derived from the Latin minimus, refers to the small size of the plant compared to other species of the genus. Its total size does not exceed 20 cm in height, with its delicate leaves measuring approximately 2.2 cm.

 

Moreira A.L.C., Faria J.E.Q., Cunha Neto I.L., Mata L.R. and M.R.V. Zanatta. 2025. Bonamia minima (Convolvulaceae): A New Species from Brazil, with notes on leaf anatomy and pollen morphology. Rheedea. 35(2):51-61. https://rheedea.in/journal/ftH8cFXW 

DOI: 10.22244/rheedea.2025.35.02.01 [30-Jun-2025] 

 Researchgate.net/publication/394678526_Bonamia_minima_a_new_species_from_Brazil

[Botany • 2025] A Synopsis of the Genus Jacquemontia (Convolvulaceae) in the Indo-Pacific with the Description of One New Species, Jacquemontia mohotaniensis

 Jacquemontia mohotaniensis Staples & Butaud,

in Staples, Butaud et Halford, 2025. 

DOI: doi.org/10.2984/78.2.3 

Abstract 

Examination of specimens from the Marquesas Islands, French Polynesia, disclosed the presence of an undescribed species of Jacquemontia Choisy from the uninhabited island of Mohotani: the new species Jacquemontia mohotaniensis is described here and its conservation status is proposed as critically endangered. To place this novelty in context, a review of the native and naturalized Indo-Pacific taxa of Jacquemontia is provided; 14 names are accounted for and some taxonomic problems are highlighted for future study. New combinations are made for two Australian species, J. distigma (Benth.) Halford and J. flexuosa (Spreng.) Halford; a second step typification is provided for the latter name to stabilize the nomenclature.

KEYWORDS: biodiversity, Oceania, Marquesas, French Polynesia, Australia

 Jacquemontia mohotaniensis growth habit and plant parts.
(A) Habit showing flowers with fully reflexed corolla lobes and exserted genitalia; (B) flower with erect corolla lobes; (C) fruits, lateral view; (D) fruits, apical view, note 8 valves; (E) seeds in adaxial and abaxial views, note palisade of stiff hairs along margins and ventral keel, scale = 2 mm.

Photos A–D, J.-F. Butaud from living plants in DIREN; 

photo E, G. Staples, voucher: Butaud 4587 (A).

Jacquemontia mohotaniensis Staples & Butaud, sp. nov.

 TYPE: French Polynesia. Society Islands: ...

 DIAGNOSIS: Jacquemontia mohotaniensis resembles most closely J. paniculata but differs from that species in the larger flowers, 1.5–1.8 cm long and up to 1.9 cm in diameter, the corolla subsalverform, 5-lobed, pure white, with exserted stamens and stigmas (Figure 1). The unequal sepals, the outer 2 larger and covering the inner, narrowly ovate-elliptic and 6–8 mm long 2–2.5 mm broad (Figure 2) serve to distinguish this new species from all other known Jacquemontia.

G. Staples, Jean-François Butaud and David A. Halford. 2025. A Synopsis of the Genus Jacquemontia (Convolvulaceae) in the Indo-Pacific with the Description of One New Species. Pacific Science 78 (2), 153-163. DOI: doi.org/10.2984/78.2.3 (6 January 2025) 

[Botany • 2025] Jacquemontia verae (Convolvulaceae) • A New Species from Brazilian Savannas

Jacquemontia verae   

in Pastore, Moreira, Morais, Romeiro et Simão-Bianchini, 2025.

DOI: doi.org/10.11646/phytotaxa.701.1.4

 

Abstract

Jacquemontia verae is described as a new species from “cerrado rupestre” vegetation in the Cerrado biome of Goiás, Brazil. Line drawings and photographs illustrate the new species, including optical and scanning electron microscope images of pollen. It is compared morphologically with similar species of Jacquemontia and an identification key to species from the state of Goiás is provided. The conservation status of the new species is informally assessed as Critically Endangered (CR). Its relationships within Jacquemontia and its stigma structure are discussed.

Cerrado, endangered plant, palynology, taxonomy, tropical America, Eudicots

 

Mayara PASTORE, André Luiz C. MOREIRA, Isa Lucia de MORAIS, Luiza A. ROMEIRO and Rosângela SIMÃO-BIANCHINI. 2025. Jacquemontia verae (Convolvulaceae): A New Species from Brazilian Savannas.  Phytotaxa. 701(1); 56-68. DOI: doi.org/10.11646/phytotaxa.701.1.4 [2025-05-13]

 

Nova espécie de planta do Cerrado é descoberta por professora da UEG 

https://agenciacoradenoticias.go.gov.br/155323-nova-especie-de-planta-do-cerrado-e-descoberta-por-professora-da-ueg

[Botany • 2024] Argyreia manjolaiensis (Convolvulaceae) • A New Species from the southern Western Ghats, India

Argyreia manjolaiensis Karupp., Bharath & P.S.S.Rich., 

in Yadav, Karuppusamy et Richard, 2024. 

rheedea.in/journal/GI7f2reS 

Abstract

Argyreia manjolaiensis (Convolvulaceae), a new species from the southern Western Ghats of Tamil Nadu, is described and illustrated. Detailed description, photoplates, and distribution map are provided. Information on population status and ecology is also presented to facilitate the identification and conservation of the species.

Keywords: Endemic species, Morning glory, Tamil Nadu, Taxonomy

Argyreia manjolaiensis Karupp., Bharath & P.S.S.Rich.:
a. A flowering twig; b. Leaf–abaxial view; c. Leaf–adaxial view; d. Leaf abaxial surface–Closeup view; e. Leaf–tip; f. Inflorescence; g. Bracts; h. Flower–frontview; i. Sepals; j. Flower–side view; k. Flower cut open showing stamens and pistil; l. Stamens; m. Pistil

(Photos P.S.S. Richard)

Argyreia manjolaiensis Karupp., Bharath & P.S.S.Rich., sp. nov. 

 Morphologically similar to A. fulgens Choisy but can be easily distinguished from 2–2.5 cm long petiole (vs. 3–7 cm long), a cordate lamina base (vs. rounded), a hairy abaxial surface of the lamina (vs. glabrous), 12 secondary veins (vs. 18–22), 10–12-flowered inflorescence (vs. 5–7-flowered), 3 bracts (vs. 2), subequal or unequal sepals (vs. equal) and a corolla tube that is pale purple at the base and milky white at the throat (vs. dark purple throughout). A detailed morphological comparison is provided in Table 1.

....

Yadav P.B.S., Karuppusamy S. and P.S.S. Richard. 2024. A New Species of Argyreia (Convolvulaceae) from the southern Western Ghats, India. Rheedea. 34(5);  rheedea.in/journal/GI7f2reS 

[Botany • 2024] Ipomoea simoesiana (Convolvulaceae) • A New Species from the Western Ghats, India

 Ipomoea simoesiana  Shimpale, A.V. Kattee & S.B. Patil, 

in Kattee, Patil et Shimpale, 2024. 

https://rheedea.in/journal/3p4XOk6L 

 facebook.com/AnaRita58910 

Abstract

Ipomoea simoesiana, a new species of Convolvulaceae is described from the Western Ghats of India. The species is morphologically similar to I. ochracea (Lindl.) G.Don but it is distinguished by its hirsute stem and sepals, leaves with an acute apex, globose capsule, and hirsute seeds. A detailed description, distribution, phenological period and relevant taxonomic notes are provided to facilitate its easy identification. An identification key for all yellow-flowered species of Ipomoea in India is also included. The conservation status has been provisionally assessed as Endangered.

Keywords: Biodiversity, Rocky crevices, Maharashtra, Morning Glory, Sahyadri range 

 Ipomoea simoesiana sp. nov.: 
a. Habit; b. Flower; c. Calyx lobes; d. Flower–Longitudinal section; e. Stamen; f. Gynoecium; g. Capsule; h. Seeds.

 Ipomoea simoesiana sp. nov.:
a. Flowering twig; b. Tuberous root; c. Corolla–top view; d. Flower–split open showing stamens and gynoecium; e. Calyx; f. Capsule; g & h. Seeds.

Ipomoea simoesiana Shimpale, A.V. Kattee & S.B. Patil sp. nov. 

 The new species is morphologically similar to Ipomoea ochracea (Lindl.) G. Don in terms of habit and flower color but can be distinguished by several key features: it has hirsute stems (vs. glabrous or tomentellous); leaves that are cordate at the base and acute to acuminate at the apex (vs. broadly cordate at the base and finely acuminate); densely hirsute sepals (vs. glabrous to tomentellous sepals); a corolla tube that is yellow throughout (vs. purple inside at the base); and globose fruits (vs. ovoid fruits), and hirsute seeds (vs. seeds reticulate, glabrous to tomentose at margins).

Etymology: The species is named after Dr. Ana Rita G. Simoes, Scientist at Royal Botanic Gardens, Kew, UK in recognition of her contribution to the studies of the family Convolvulaceae, especially in tribe Merremieae.

 

Kattee A.V., Patil S.B. and V.B. Shimpale. 2024. Ipomoea simoesiana (Convolvulaceae): A New Species from the Western Ghats, India. Rheedea. 34(5); 488–505. https://rheedea.in/journal/3p4XOk6L

  facebook.com/AnaRita58910/posts/10160443796140919

 

[Botany • 2024] Distimake aparantae (Convolvulaceae: Merremieae) • A New Species from the coast of the northern Western Ghats, India

 

Distimake aparantae S.B.Patil, Shimpale & A.R.Simões, 

in Patil, Simões et Shimpale, 2024. 

DOI: doi.org/10.1007/s12225-024-10231-2

 x.com/AnaRitaGSimoes

Summary

A new species of Convolvulaceae from India, Distimake aparantae, is described and illustrated. The species is restricted to the northern Western Ghats, on sea-facing slopes in coastal regions, at low altitude and may be Critically Endangered. It is morphologically similar to D. rhyncorhiza, differing by the pendulous flowers (vs erect in D. rhyncorhiza), corollas widening from the base without a cylindrical tube (vs funnel-form), leaves deeply lobed with entire margins (vs deeply dissected margins), seeds shortly pubescent, with long golden hairs along the margins (vs mostly glabrous) and pollen 15-pantocolpate (vs 12-pantocolpate). A key to the species of Distimake in India is also provided. Distimake currently includes 49 species, the vast majority are native to Tropical Africa and Tropical America. Only nine species of Distimake occur in Asia, most of them are pantropical, extending their distributions into this region. Three are, however, restricted to Asia, of which two are widespread across SE Asia (D. vitifolius and D. quinatus) and one is narrowly endemic in the Western Ghats (D. rhyncorhiza). The latter three have been demonstrated to be phylogenetically closely related to each other. Distimake aparantae raises the total of Distimake species in Asia to ten and becomes the second species of Distimake endemic to the Western Ghats. It is expected to be phylogenetically close to D. rhyncorhiza, D. vitifolius and D. quinatus. This is the first time that 15-pantocolpate pollen is reported in Distimake. We estimate that the species diversity of this small, Asian clade of Distimake may have been overlooked and that more species remain undescribed, especially in such highly diverse regions as the Western Ghats.

Key Words: Endemism, Merremieae, morning glory, Sahyadri Mountains

Distimake aparantae S.B.Patil, Shimpale & A.R.Simões sp. nov. 

Etymology. The species is named after its type locality: Aparanta refers to the northern part of the Konkan region, on the western coast of India.

Sujit B. Patil, Ana Rita Giraldes Simões and Vinod B. Shimpale. 2024. Distimake aparantae (Convolvulaceae), A New Species from the coast of the northern Western Ghats, India. Kew Bulletin. DOI: doi.org/10.1007/s12225-024-10231-2

 x.com/AnaRitaGSimoes/status/1872681640956514541 

[Botany • 2024] Argyreia collinsiae subsp. megabracteata • The Argyreia collinsiae Species Complex (Convolvulaceae): Phenetic Analysis and Geographic Distribution reveal Subspecies New to Science

 

Argyreia collinsiae subsp. megabracteata Traiperm & Srisombat, 

Srisombat​, Chitchak​, Rattanakrajang, Stewart et Traiperm,. 2024. 

DOI: 10.7717/peerj.18294

Abstract 

Argyreia Lour. is a speciose genus in the Convolvulaceae. However, the genus contains several problematic species complexes due to their morphological similarity. In this study, we aimed to resolve the Argyreia collinsiae complex, which consists of four similar operational taxonomic units (OTUs), i.e., A. collinsiae (Craib) Na Songkhla & Traiperm, A. dokmaihom Traiperm & Staples, A. versicolor (Kerr) Staples & Traiperm, and a peculiar OTU typically known as the large-bract morphotype of A. collinsiae. Following morphological comparison and phenetic analysis, all four OTUs were found to be distinct. However, the large-bract morphotype of A. collinsiae was confirmed to be more closely related to the original morphotype of A. collinsiae than to the other two species. Species distribution modeling (SDM) was then conducted for both morphotypes of A. collinsiae, revealing different geographical ranges of suitable habitat for each. In conclusion, the large-bract morphotype of A. collinsiae was described in this study as a new subspecies, A. collinsiae subsp. megabracteata Traiperm & Srisombat, subsp. nov., based on morphological differences and separate geographic range. We also provide here an identification key, description, detailed illustrations, distribution data, and ecological notes of the new subspecies. An updated description of A. versicolor and an assessment of its conservation status were also prepared since the original description was based solely on dried herbarium specimens and lacks key details.

Original A. collinsiae morphotype,  

Argyreia collinsiae subsp. megabracteata Traiperm & Srisombat, subsp. nov.,

 A. dokmaihom and A. versicolor 

 

Macro and micro morphology of the four studied Argyreia OTUs.
Original A. collinsiae morphotype (A, E, I, M: Y. Sirichamorn (2018) 10; Q, U: P. Rattanakrajang et al. 143), large-bract A. collinsiae morphotype (B, F, J, N, R, V: P. Hassa 17), A. dokmaihom (C, G, K, O: Staples et al. 1546; S, W: P. Rattanakrajang et al. 137) and A. versicolor (D, H, L, P: A. Jirabanjongjit et al. 08; T, X: P. Traiperm et al. 630).
Non-glandular trichomes (Y, Z, AA, AB) consisted of simple straight non-glandular trichomes (Y-Z, AB), and non-glandular trichomes with bicellular-branched apical cells (AA). Glandular trichomes (AC-AF) consisted of short-stalked glandular trichomes (AC-AF), and long-stalked glandular trichomes (AF).

Photos by N. Chitchak (AA, AF), P. Hassa (R, V: P. Hassa 17), P. Rattanakrajang (S, T, W, X: P. Rattanakrajang et al. 137, P. Traiperm et al. 630), P. Srisombat (Y-Z, AB-AE) and W. Inta (Q, U: P. Rattanakrajang et al. 143). 

Red arrowhead indicates non-glandular trichome on the abaxial surface of the mid-petaline band. Abbreviations: ap, apical cell; bc, bicellular-branched apical cell; ls, long-stalked glandular trichome; ss, short-stalked glandular trichome; st, stalk.

Argyreia collinsiae subsp. megabracteata Traiperm & Srisombat, subsp. nov.
 Plant habit (A), inflorescence (B), and fruits (C).

Photos by N. Chitchak; (A, B) P. Traiperm et al. 625 and (C) P. Srisombat 05.

Argyreia collinsiae (Craib) Na Songkhla & Traiperm,

 Thai Forest Bull., Bot. 33: 42. 2005

  Subsp. megabracteata Traiperm & Srisombat, subsp. nov.

Distribution: Thailand (Northeastern and Eastern).

Habitat: Dry deciduous forest, mixed evergreen-deciduous forest, canal bank, roadside, and rice fields

Etymology: The epithet ‘megabracteata’ is derived from prominent bracts larger than the original mophotype.

Poompat Srisombat​, Natthaphong Chitchak​, Pantamith Rattanakrajang, Alyssa B. Stewart and Paweena Traiperm​. 2024. The Argyreia collinsiae Species Complex (Convolvulaceae): Phenetic Analysis and Geographic Distribution reveal Subspecies New to Science. PeerJ. 12:e18294. DOI: doi.org/10.7717/peerj.18294

[Botany • 2023] Dicranostyles yrypoana (Convolvulaceae) • A New Species from the Brazilian Amazon Rainforest

Dicranostyles yrypoana   

in Pastore, Simão-Bianchini, Alves dos Santos, Torres et Viana, 2023. 

DOI: 10.1600/036364423X16758873924126 

 unicamp.br 

Abstract

A new species of liana, Dicranostyles yrypoana (Convolvulaceae) is described from the Central Amazon rainforest in Brazil. The specimens of D. yrypoana remained with dubious identification in herbaria for at least 60 yr. This new species is distinguished from other species of Dicranostyles mainly for its tomentose leaves, in addition to its cylindric glabrous ovary, short style (0.5–0.6 mm long), and globose stigma. The specific epithet yrypoana refers to yripo, which means liana in the language of the Sateré-Mawé people that originally live in the region of occurrence of this new species. We provide morphological and palynologic descriptions, a distribution map, illustrations, taxonomy comments, an identification key, and comparisons with similar species. Dicranostyles yrypoana is informally assessed as Endangered (EN) based on IUCN criteria and guidelines.

KEYWORDS: Central Amazon, endangered plant, lianas, Maripeae, Solanales, taxonomy of angiosperms

 

Dicranostyles yrypoana

Mayara Pastore, Rosângela Simão-Bianchini, Daiane Alves dos Santos, Daniela Santos Carneiro Torres and Pedro Lage Viana. 2023. The Discovery of A New Species of Convolvulaceae: Dicranostyles yrypoana from the Brazilian Amazon Rainforest. Systematic Botany. 48(1); 88-95 DOI: 10.1600/036364423X16758873924126

Nova espécie de cipó, da família da batata-doce, é descoberta na Amazônia

 blogs.unicamp.br/naturezacritica/2023/04/19/nova-especie-de-cipo-da-familia-da-batata-doce-e-descoberta-na-amazonia/

Uma nova espécie de liana, Dicranostyles yrypoana (Convolvulaceae), é descrita para a floresta da Amazônia Central no Brasil. Os espécimes de D. yrypoana permaneceram nos herbários com identificação duvidosa por pelo menos 60 anos. Esta nova espécie é distinguida das outras espécies de Dicranostyles principalmente por suas folhas tomentosas, além de seu ovário cilíndrico e glabro, estilete curto (0.5–0.6 mm compr.) e estigma globoso. O epíteto específico yrypoana refere-se a yrypo que significa cipó na linguagem dos Sateré-Mawé, povos originários da região de ocorrência desta nova espécie. Nós fornecemos descrições morfológica e palinológica, mapa de distribuição, ilustrações, comentários taxonômicos, chave de identificação e comparação com espécies similares. Dicranostyles yrypoana é avaliada informalmente como Em Perigo (EN) baseada nos critérios e instruções da IUCN.

Amazônia Central, lianas, Maripeae, planta ameaçada, Solanales, taxonomia de angiospermas

[Botany • 2023] Argyreia subrotunda (Convolvulaceae) • A New Species from Yunnan, China

Argyreia subrotunda Q.R.Liu & M.L.Zhang, 

in Zhang, He et Liu, 2023. 

DOI: 10.3897/phytokeys.225.100646

Abstract

Argyreia subrotunda, a new species from Yunnan Province, China, is described and illustrated. The new species resembles A. fulvocymosa and A. wallichii, but differs from these in the flowers with an entire or shallowly lobed corolla, as well as smaller elliptic bracts, lax flat-topped cymes and shorter corolla tubes. An updated key to the species of Argyreia from Yunnan province is also provided.

Keywords: Argyreia subrotunda, flora of Yunnan, morphology, new taxon, taxonomy

Argyreia subrotunda Q.R.Liu & M.L.Zhang, sp. nov.
A stem with leaves and inflorescences B bract (outside) C bract (inside) D sepals from outer (left) to innermost (right) E opened corolla showing mid-petaline bands F opened corolla with stamens G pistil H fruit with persistent sepals I seed (adaxial surface) J seed (lateral surface).

All drawn by Quan-Ru Liu from voucher specimens M. L. Zhang BNU2021YN074 (BNU!) 

(A–G), X. B. Guo BNU2021YN081 (BNU!) (H–J).

Argyreia subrotunda Q.R.Liu & M.L.Zhang, sp. nov.
 A plant habit B inflorescence C flower in frontal view D fruit with persistent sepals E seeds: adaxial surface (left); lateral surface (right).

Scale bar: 5 mm. 

Photographs A–C, E by Mao-Lin Zhang, D by Xi-Bing Guo.

 Argyreia subrotunda Q.R.Liu & M.L.Zhang, sp. nov.

 

Diagnosis: A. subrotunda is unique, a small-flowered type with an entire or shallowly lobed corolla as well as exserted stamens and pistils (included in dry specimens), smaller elliptic bracts, and outer sepals ovate-circular. It is similar to A. wallichii in indumentum features (whitish tomentose) and fruit types (red globose berry), but differs by its smaller elliptic bracts (vs. ovate-oblong), lax flat-topped cymes (vs. compact capitate) and shorter corolla tubes (2–2.5 cm vs. 4–5 cm). Additionally, A. subrotunda is similar to A. fulvocymosa in leaf shape (broadly ovate-circular to nearly circular) and inflorescence (flat-topped cymes), but the latter is covered with densely yellowish villus and has a distinctly 5-lobed corolla, which is very easy to distinguish (Table 1).

Etymology: The specific epithet refers to the leaf shape, which is near-round.

Chinese name: 近圆叶银背藤

 (Jìn Yuán Yè Yín Bèi Téng).

 Mao-Lin Zhang, Yi He and Quan-Ru Liu. 2023. A New Species of Argyreia (Convolvulaceae) from Yunnan, China. PhytoKeys. 225: 199-209.  DOI: 10.3897/phytokeys.225.100646

[Botany • 2022] Reduction of Blinkworthia (Convolvulaceae) based on Multilocus Phylogenetic Reconstruction and Resurrection of A Species from Synonymy revealed by Phenetic Analyses

E, F Argyreia lycioides.
A, B Argyreia campanuliflora.
C, D Argyreia convolvuloides.

in Rattanakrajang, Sumanon, Traiperm, Staples et Utteridge, 2022. 

DOI: 10.1007/s12225-022-10052-1 

Researchgate.net/publication/363885332

photos: A – B, E – F P. Rattanakrajang; C – D K. Kotun. 

Summary

Blinkworthia was established as a tropical Asian genus in the morning glory family (Convolvulaceae) with a unique combination of habit, bract, corolla and fruit morphology. Recently, however, investigations of the morphology and anatomy have shown that none of these diagnostic characters can be used to delimit Blinkworthia as an independent genus. This study resolves the generic circumscription using phylogenetic analysis of molecular data from four loci: ITS, trnL-trnF, matK and rps16. The results showed that all members of Blinkworthia were nested within Argyreia, concordant with the current morphological concept of Argyreia. All information robustly supported that Blinkworthia should be subsumed under Argyreia prompting us to make the nomenclatural transfers from Blinkworthia to Argyreia and make the new combinations A. convolvuloides and A. lycioides. In addition, phenetic analyses revealed that a species endemic to Burma, A. campanuliflora, should be resurrected from the synonymy of B. convolvuloides. The three species are circumscribed, described, illustrated and their ecology, distribution and vernacular names are summarised, all documented with specimen citations. An identification key is provided for these three closely related species.

Key Words: Argyreia, classification, generic delimitation, new combination, South-East Asia, systematics

A, B Argyreia campanuliflora. A plant habit and flowers in side view with boat-like bracts (triangle); B stem (yellow triangles).
C, D Argyreia convolvuloides. C flowers in side view with recurved leaf-like bracts (triangle); D plant habit.
E, F Argyreia lycioides. E flowers in side view with tiny elliptic-shaped bracts (triangle); F plant habit.

photos: A – B, E – F P. Rattanakrajang; C – D K. Kotun. 

 

Pantamith Rattanakrajang, Pirada Sumanon, Paweena Traiperm, George Staples and Timothy Utteridge. 2022. Reduction of Blinkworthia (Convolvulaceae) based on Multilocus Phylogenetic Reconstruction and Resurrection of A Species from Synonymy revealed by Phenetic Analyses. Kew Bulletin. DOI: 10.1007/s12225-022-10052-1 

Researchgate.net/publication/363885332_Reduction_of_Blinkworthia 

ความสัมพันธ์ทางอนุกรมวิธานในพืชวงศ์ผักบุ้ง สกุลเครือพูเงิน และ สกุลระฆังช้างเผือก

 facebook.com/paweenat/posts/pfbid0p5cBMqftFE95yoWEQkQBrnrE6GvFYunHiyapQ7KYdE6TYZkXzpBsJfR4idTanNv1l

  plantscience.sc.mahidol.ac.th/?p=1994

Researchgate.net/publication/321933659_Re-evaluation_of_generic_characters_for_Blinkworthia

[Botany • 2020] Argyreia lakshminarasimhanii (Convolvulaceae) • A New Species from the southern Western Ghats, Tamil Nadu, India

Argyreia lakshminarasimhanii S.Shalini, Sujana, Arisdason & D.Maity, 

in Shalini, ... et Maity, 2020. 

 rheedea.in 

 facebook.com/Rheedea 

Abstract

Argyreia lakshminarasimhanii S.Shalini, Sujana, Arisdason & D.Maity a new species of Convolvulaceae from the southern Western Ghats of Tamil Nadu is described and illustrated here. The new species is morphologically different from its closely related species A. involucrata C.B.Clarke especially in its habit, shape, apex and texture of leaves, attachment of the stamens and in the length of the filaments. The micromorphological features of pollen grains are provided. 

Keywords: Argyreia lakshminarasimhanii, Climber, Megamalai, Pollen morphology, Taxonomy.

.  Argyreia lakshminarasimhanii S.Shalini, Sujana, Arisdason & D.Maity:
 a. Flowering branch; a b. Outer sepals; b c. Middle and inner sepals; c d. Corolla split-open; d e. Longer stamens; e f. Shorter stamens; f g. Gynoecium

(from g K.A. Sujana & S. Shalini 70527; 

a–c and e–g drawn by D.K. g Sah, and d by M. Midday).

Argyreia lakshminarasimhanii S.Shalini, Sujana, Arisdason & D.Maity: a. Habitat

(photos by K.A. Sujana).

Argyreia lakshminarasimhanii S.Shalini, Sujana, Arisdason & D.Maity:
 b. Habit (part); c. Flower

 (photos by K.A. Sujana).

Argyreia lakshminarasimhanii S.Shalini, Sujana, Arisdason & D.Maity, sp. nov. 

This new species most closely resembles A. involucrata C.B.Clarke in leaf shape (ovate, longer than broad), subcapitate cymes, large bracts but can easily be distinguished from the latter by densely tomentose abaxial leaf surface, retuse leaf apex, and short stamens, adnate to basal part of corolla tube.

Habitat: Semi-evergreen and moist deciduous forests at an elevation of about 1000 m.

 Etymology: The species epithet refers to Dr. P. Lakshminarasimhan, former senior scientist of Botanical Survey of India and research supervisor of the first author, for his significant contributions to Indian taxonomy. 

Distribution: Presently known only from the type locality, Megamalai, Theni district, Tamil Nadu, southern India, possibly endemic (Fig. 4). Found climbing on trees along the ghat roads on the way to the entrance of Megamalai Wildlife Sanctuary

Shalini S., Sujana K.A., Arisdason W. and D. Maity. 2020. A New Species of Argyreia (Convolvulaceae) from the southern Western Ghats, Tamil Nadu, India. RHEEDEA. 30(4); 270–277.

 rheedea.in/journal/275fvQsW

 facebook.com/Rheedea/posts/730071111271678

rheedea.in/storages/submission/file/469063129.pdf