[Botany • 2020] Primulina inflata (Gesneriaceae) • A New Species of Primulina from Danxia landform in Jiangxi, China

Primulina inflata Li.H. Yang & M.Z. Xu

in Xu, Kong, Kang & Yang, 2020. 

粗筒小花苣苔  ||  taiwania.ntu.edu.tw

Abstract

Based on morphological observations and comparisons, a new species of Primulina (Gesneriaceae), Primulina inflata Li.H. Yang & M.Z. Xu, is described and illustrated. This new species resembles P. xiuningensis in leaf blade shape and indumentum, and differs from the latter by the white corolla with longitudinally purple-red stripes (vs. yellowish without stripes), inflated tubular corolla tube (vs. tubular) and straight filament (vs. geniculate). The descriptions, illustrations and photographs of this new species are provided here.

Keyword: China, Gesneriaceae, Primulina, Primulina inflata, P. xiuningensis, Taxonomy

Fig. 2. Primulina inflata sp. nov. (A–F) and P. xiuningensis (G–I).
A, G. habit, B. flowering plant cultivated in SCBG, C, H. flower in side view, D. cyme, E, I. opened corolla, showing stamens and staminodes, F. pistil and calyx lobes, inset enlarged view of stigma. Scale bars: A, B, G=20 mm, C–F, H, I=10 mm. Arrows indicate the anthers (in E) and stigma (in F).

Fig. 1. Primulina inflata sp. nov. A. habit, B1. abaxial leaf surface, B2. adaxial leaf surface, C. pistil, D. flower in front view, E. flower in side view, F. opened corolla, showing stamens and staminodes, G. calyx lobes, H. coherent anthers. Scale bars: A, B=20 mm, C, E, F=10 mm, D=5 mm, G=3 mm, H=2 mm. Drawn by Yun-Xiao Liu based on cultivated individual collected from type locality.

Primulina inflata Li.H. Yang & M.Z. Xu, sp. nov. 

粗筒小花苣苔 

Diagnosis: Primulina inflata differs from P. xiuningensis by the white corolla with longitudinally purple-red stripes (vs. yellowish without stripes), inflated corolla tube (vs. tubular) and straight filaments (vs. geniculate).

Distribution and habitat: As most other Primulina species, P. inflata is a species endemic to Xingguo County, Jiangxi Province. Based on our field investigations, this new species is only found at its type locality at Bingxindong scenic area in a Danxia Geopark. Plants of this new species grow on the moist rock surface of a cave entrance. We observed about 200 mature individuals of this new species at the type locality in 2016, but no more than 50 mature individuals in 2018. The serious reduction of the population size mostly resulted from human disturbance. Based on this information, P. inflata is considered as Critically Endangered (CR): B2a,b(iii,v); C2a(i), following the IUCN categories and criteria (IUCN 2016). However, our field investigations on this species are insufficient, and more fieldwork is required to comprehensively understand its geographical distribution.

Etymology: The specific epithet is derived from the inflated corolla tube of this new species.  

Mei-Zhen Xu, Hang-Hui Kong, Ming Kang and Li-Hua Yang. 2020. A New Species of Primulina (Gesneriaceae) from Danxia landform in Jiangxi, China. Taiwania. 65(2); 163-166.  

taiwania.ntu.edu.tw/abstract.php?type=abstract&id=1667

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[Botany • 2020] Primulina yulinensis (Gesneriaceae) • A New Species from Guangxi, China

Primulina yulinensis Ying Qin & Yan Liu

in Qin, Ye, Xu & Liu, 2020. 

 Taiwania. 65(1) 

 tai2.ntu.edu.tw/taiwania

Abstract

Primulina yulinensis sp. nov. (Gesneriaceae), a new species from the limestone area in Guangxi, China is here described and illustrated. P. yulinensis is similar to P. hezhouensis (W. H. Wu & W. B. Xu) W. B. Xu & K. F. Chung, but it differs from the latter by its smaller and margin lobed leaves, long pedicel, larger flower and 2-lipped limb.

Keyword: China, Chiritopsis, Gesneriaceae, new species, Primulina yulinensis

Fig. 1. Primulina yulinensis A: Flowering habit. B: Flower in side view. C: Opened corolla. D: Flower in top view. E: Flower in face view. F: Pistil and disc. G: Capsule. H: Calyx. I: Bract.

Fig. 2. Primulina yulinensis A: Flowering habit. B: Cyme. C: Capsule. D: Flower. E: Opened corolla. F: Flower in face view. G: Flower in side view. H: Pistil and disc. I: Bract with coarse teeth. J: Bract entire.

Primulina yulinensis Ying Qin & Yan Liu, sp. nov.

  

Primulina yulinensis is similar to P. hezhouensis (W. H. Wu & W. B. Xu) W. B. Xu & K. F. Chung, but it differs from the latter by its leaves 3.3–7 × 2.8–7.7 cm, margin lobed (vs. 7–13 × 6–12 cm, margin deeply lobed), pedicel 0.5–2 cm long (vs. 1–3 mm long), corolla ca. 1 cm long, corolla tube ca. 6.4 mm long, ca. 4.8 mm in diameter (corolla 3–5 mm long, corolla tube 3–4 mm long, ca. 2.5 mm in diameter), limb 2-lipped (vs. indistinctly 2-lipped). 

Etymology: The specific epithet is derived from Yulin city, Guangxi, China.  

Ying Qin, Xiao-Xia Ye, Wei-Bin Xu and Yan Liu. 2020. Primulina yulinensis, A New Species of Gesneriaceae from Guangxi, China. Taiwania. 65(1); 5-9. DOI: 10.6165/tai.2020.65.5  

tai2.ntu.edu.tw/taiwania/abstract.php?type=abstract&id=1646

   

[Botany • 2019] Primulina anisocymosa (Gesneriaceae) • A New Species with A Unique Inflorescence Structure from Guangdong, China

Primulina anisocymosa F. Wen, Xin Hong & Z.J. Qiu

in Hong, Keene, Qiu & Wen, 2019. 

DOI: 10.7717/peerj.6157

Abstract

 A new Primulina species from Guangdong, China with an unusual inflorescence is described here. Primulina anisocymosa is vegetatively most similar to P. bobaiensis. It can be distinguished from all species within Primulina morphologically by its unique zigzag monochasial cyme and infructescence. To confirm the phylogenetic relationships and generic placement of this species, not only morphological anatomical features but also chromosome and DNA sequence data were examined and analysed here. Two samples from different populations identified as Primulina anisocymosa are monophyletic and were nested in a monophyletic clade within Primulina with high branch support. The somatic chromosome number of the new species is also reported (2n = 36), supporting its placement in the genus.

Figure 3: Line-drawing of Primulina anisocymosa F. Wen, Xin Hong and Z.J. Qiu.
(A) Plant in flower. (B) Corolla opened showing stamens and staminodes. (C) Calyx and pistil with ovary, style and stigma. (D) Seed. —Drawn by Ms. Xiao-Ming Xu and Ms. Wen Ma.  

Figure 4: Photos of Primulina anisocymosa two populations in natural habitat.
(A, B) Habitat (A, Gaozhou; B, Yangchun) (C, D) Vegetative part of plants (C, Yangchun; D, Gaozhou) (E) Bracteoles, showing not-paired, aligned on one side at the base of pedicel. (F) Cymule, reduced to the point attachment and forming swollen nodules at the base. (G) Zigzag monochasial infructescence. Photos by Fang Wen.

Figure 5: Comparison of Primulina anisocymosa and P. bobaiensis.
 (A) Habit of P. anisocymosa when in flower. (B) A. Habit of P. bobaiensis when in flower. (C) Adaxial leaf blades (left: P. bobaiensis, right: P. anisocymosa). (D) Abaxial leaf blades (left: P. bobaiensis, right: P. anisocymosa). (E) Cymes (upper: P. anisocymosa, lower: P. bobaiensis). (F) Bracts (left: P. anisocymosa, right: P. bobaiensis). (G) Frontal view of corolla of P. anisocymosa. (H) Frontal view of corolla of P. bobaiensis. (I) Top view of corolla (left: P. anisocymosa, right: P. bobaiensis). (J) Lateral view of corolla of P. anisocymosa. (K) Lateral view of corolla of P. bobaiensis. (L) Opened corolla of P. anisocymosa. (M) Opened corolla of P. bobaiensis. (N) Pistils without corolla (left: P. anisocymosa, right: P. bobaiensis). Photoed by Xin Hong and Fang Wen.

    

Primulina anisocymosa F. Wen, Xin Hong & Z.J. Qiu, sp. nov.

Diagnosis. Primulina anisocymosa differs from other congeners by the presence of a zigzag monochasial cyme.

Distribution. The new species is known from two locations: Gaozhou City and Yangchun City, Guangdong Province, southern China. This area is in the transitional zone between the tropics and subtropics.

Habitat and ecology. Primulina anisocymosa is locally abundant in Yangchun, although very rare in Gaozhou, Guangdong. The total number of this species in Gaozhou does not exceed 100 individuals. It grows in rocky crevices of moist shady cliffs on a red sedimentary rock hill, at an elevation of 50 m a.s.l in Gaozhou City. The species also grows on the moist rock surface of limestone cave entrances in Yangchun. The average annual temperature of the two localities is similar (ca. 21 °C) and the average annual precipitation is around 2,380 mm. P. anisocymosa occurs in subtropical evergreen broad-leaved forest. Flowering from September to October and fruiting from October to December.

Etymology. The scientific name is derived from its unusual zigzag monochasial cyme. The latin prefix, “aniso-”, means different, uneven or asymmetrical; “cyma” refers to the predominant inflorescence type seen in Primulina a pair-flowered cyme.

Xin Hong, Jeremy Keene, Zhi-Jing Qiu and Fang Wen​. 2019. Primulina anisocymosa (Gesneriaceae), A New Species with A Unique Inflorescence Structure from Guangdong, China.  PeerJ. 7:e6157.   DOI: 10.7717/peerj.6157

[Botany • 2018] Primulina malipoensis • A New Species (Gesneriaceae) from Sino-Vietnamese Border Area

Primulina malipoensis  L.H. Yang & M. Kang

 P. maguanensis (Z. Yu Li, H. Jiang & H. Xu) Mich. Möller & A. Weber

P. lungzhouensis  (W.T. Wang) Mich. Möller & A. Weber

in Yang, Chen, Wen & Kang, 2018. 

 DOI: 10.3897/phytokeys.94.20861 

Abstract

Primulina malipoensis, a new species from limestone areas around the Sino-Vietnamese border, is described and illustrated. This new species is morphologically similar to P. maguanensis and P. lungzhouensis, but obviously differs from the latter two species by its pale greenish-yellow flowers (vs. purple, with different colour patterns). The phylogenetic affinity, illustration and photographs of this new species are provided in this paper.

Keywords: Limestone flora, New taxon, Sino-Vietnamese border area, Taxonomy

Primulina malipoensis L.H. Yang & M. Kang, sp. nov.

Diagnosis: Primulina malipoensis mainly differs from P. maguanensis and P. lungzhouensis by its pale greenish-yellow flowers (vs. purple, with different colour patterns). This new species can further be distinguished from P. maguanensis by its greenish bracts (vs. white) and from P. lungzhouensis by its entire bracts margin (vs. denticulate).

Figure 2. Primulina malipoensis.
A flowering plant cultivated in South China Botanical Garden B plant in natural habitat C flower in side view D opened corolla, showing stamens and staminodes E flower in front view F pistil and calyx G bracts.

Photographs by Li-Hua Yang. 

Figure 3. Primulina maguanensis (A, B), P. lungzhouensis (D, E),
  P. beiliuensis var. fimbribracteata (C, F), P. beiliuensis var. beiliuensis (G, H) and P. maculata (I, J).
(A, C, D, G, J) habit, (B, E, F, H, I) flower.

Photographs by Fang Wen (A–H) and Li-Hua Yang (I, J). 

Distribution and habitat: Primulina malipoensis is a narrowly endemic species restricted to a small area at both sides of the Sino-Vietnamese border (Xiajinchang Town, Malipo County, Yunnan Province, China. Khau La Village, Quyet Tien Community, Quan Ba District, Ha Qiang province, Vietnam.) (Figure 4). It grows on moist and shady limestone rocks, at ca. 1000–1500 m altitude.

Etymology: The specific epithet is derived from the place, Malipo County in Yunnan province, China, where the new species was first found.

Note: Primulina malipoensis (Figures 1 and 2) can be morphologically connected to P. maguanensis (Z. Yu Li, H. Jiang & H. Xu) Mich. Möller & A. Weber (Figure 3A–B) and P. lungzhouensis (W.T. Wang) Mich. Möller & A. Weber (Figure 3D–E) by its ovate or broadly elliptic leaf blade, with inconspicuously (or conspicuously) serrate margin, obvious bracts, white calyx lobes and infundibuliform corolla tube. However, it can easily be distinguished from the latter two species by the characters summarised in the diagnosis.

....

 Li-Hua Yang, Jun-Lin Chen, Fang Wen and Ming Kang. 2018. Primulina malipoensis (Gesneriaceae), A New Species from Sino-Vietnamese Border Area.  In: Jin X-H, Shui Y-M, Tan Y-H, Kang M (Eds) Plant Diversity in Southeast Asia. PhytoKeys. 94: 107-116.  DOI: 10.3897/phytokeys.94.20861