[Botany • 2018] A Synopsis of Begonia (Begoniaceae) of Southeastern Sulawesi including Four New Species; Begonia incudiformicarpa, B. iskandariana, B. johntania & B. tumburanoensis

Begonia incudiformicarpa Ardi & D.C. Thomas, B. iskandariana Ardi & D.C. Thomas,
B. johntania D.C. Thomas & Ardi & B. tumburanoensis Ardi & D.C. Thomas  

in Ardi, Chikmawati,  Witono & Thomas, 2018. 

DOI: 10.11646/phytotaxa.381.1.7  

 instagram.com/Widnu.H.Ardi 

Abstract  

Material acquired on a recent expedition to Southeastern Sulawesi, Indonesia, presents an opportunity to reassess and provide an overview of the Begonia flora of the region. Eleven species are recognized including four new species described and illustrated here: Begonia incudiformicarpa, B. iskandariana, and B. tumburanoensis (all in Begonia section Jackia); and B. johntania (Begonia section Petermannia). The former three species are the first confirmed records of section Jackia on Sulawesi substantially extending the known eastern range limit of this section. In addition, an illustration and a lectotypification of Begonia flacca are presented, and an identification key to Begonia species in Southeastern Sulawesi is provided.

Keywords: Jackia, Petermannia, Platycentrum, Sulawesi Tenggara, Sultra, taxonomy, Begonia, Eudicots

Wisnu H. Ardi, Tatik Chikmawati, Joko R. Witono and Daniel C. Thomas. 2018. A Synopsis of Begonia (Begoniaceae) of Southeastern Sulawesi including Four New Species. Phytotaxa. 381(1); 27–50. DOI: 10.11646/phytotaxa.381.1.7

 instagram.com/p/BrF9dm_l0To

[Botany • 2017] Begonia ignita • A New Species (sect. Petermannia, Begoniaceae) with Orange Flowers from Sulawesi, Indonesia

Begonia ignita  C.W.Lin & C.I Peng

SBG.org.sg

ABSTRACT

 Begonia ignita C.W.Lin & C.I Peng, a new species of Begonia sect. Petermannia from Sulawesi, Indonesia, is here described and illustrated. It is distinct from other species in Begonia section Petermannia by a character combination including a procumbent stem ascending only at the apex, symmetric or subsymmetric leaves, the presence of a pale band or maculation running parallel to the leaf margin, and orange tepals. A detailed comparison with a morphologically similar species, the Sulawesi endemic Begonia mendumiae M.Hughes, is provided. 

Keywords. Begonia ignita, B. mendumiae, Indonesia, new species, Sulawesi

Fig. 2. Begonia ignita C.W.Lin & C.I Peng.
A, B. Habit, showing variation in leaf colours. C, D. 5-tepaled pistillate flower (occasional), face and side views. E. Inflorescence, showing 2-tepaled staminate flowers. F. Staminate flower, face view. G. 4-tepaled pistillate flower in inflorescence. H. 2-tepaled pistillate flower (occasional). I. Cross section of ovary showing axile, bilamellate placentae. (Photos: Y.-Z. Siaw) 

Begonia ignita C.W.Lin & C.I Peng, sp. nov. § Petermannia 

This species is distinct from other species in Begonia section Petermannia by a character combination including a procumbent stem ascending only at the apex, symmetric or subsymmetric leaves, the presence of a pale band or maculation running parallel to the leaf margin, and orange tepals.

 – TYPE: Collected in Indonesia, Sulawesi, precise locality unknown, grown in cultivation in Bogor Botanic Gardens and vouchered on 9 October 2016 as Wisnu H. Ardi WI 117 (holotype BO; isotype SING). (Fig. 1, 2)

Distribution. Only known from cultivation; likely endemic to Sulawesi (see Notes). 

Etymology. The specific epithet refers to the flame-coloured tepals (Latin: igneus – flame-coloured).

C.-W. Lin, D.C. Thomas, W.H. Ardi and C.-I Peng. 2017. Begonia ignita (sect. Petermannia, Begoniaceae), A New Species with Orange Flowers from Sulawesi, Indonesia. Gardens’ Bulletin Singapore. 69(1); 89–95. DOI: 10.3850/S2010098116000081

https://www.sbg.org.sg/images/4_4_Research_Gardens_Bulletin/4_4_69_1_pdf_Vol_69_Part_1_2017/69_1_89_y2017_V69P1_GBS_pg89.pdf

ResearchGate.net/publication/317089744_Begonia_ignita_sect_Petermannia_Begoniaceae_a_new_species_with_orange_flowers_from_Sulawesi_Indonesia

[Botany • 2016] Begonia manuselaensis • A New Species of Begonia sect. Petermannia (Begoniaceae) from Manusela National Park, Seram, Maluku province, Indonesia

Begonia manuselaensis 

Ardhaka & Ardi 

DOI:  10.14203/reinwardtia.v15i1.2443

Abstract

A new species of Begonia, B. manuselaensis Ardhaka & Ardi, is described from Seram, Maluku province, Indonesia. The species is endemic to Seram and belongs to Begonia section Petermannia.

Keywords: Begonia, endemic, Manusela, Molucca, new species.

Begonia manuselaensis Ardhaka & Ardi spec. nov. § Petermannia

 Type: Indonesia, cultivated at Bali and Bogor Botanic Garden from vegetative material collected in the wild (Manusela National Park, Seram Island, Indonesia), 22 February 2016. Wisnu Ardi, WI 104 (holotype BO!; isotype KRB! SING). Fig. 1.

Diagnosis. Similar to Begonia gemella differing from that species by the very sparse indumentum of red emergences on vegetative parts, ovate to elliptic lamina with serrate margin, and longer female flower pedicel 1.6–4 cm long (glabrous vegetative parts, suborbicular lamina with sublobed margin and female flower pedicels 7 mm long in B. gemella)

I.M. Ardhaka, W.H. Ardi, N.K.E. Undaharta and I.G. Tirta. 2016. A New Species Begonia from Manusela National Park, Seram. 

Reinwardtia. 15(1): 61 – 64.  DOI:  10.14203/reinwardtia.v15i1.2443