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Sunday, May 28th, 2017

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    5:31a
    [Botany • 2017] Begonia ignita • A New Species (sect. Petermannia, Begoniaceae) with Orange Flowers from Sulawesi, Indonesia

    Begonia ignita  C.W.Lin & C.I Peng

    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

    1:32p
    [Botany • 2017] Bulbophyllum jingdongense • A New Species in the Cirrhopetalum alliance (Orchidaceae) from South China and Laos

    Bulbophyllum jingdongense 
    A. Q. Hu, D. P. Ye & Jian W. Li


    Abstract

    Bulbophyllum jingdongense, a new species from South China and Laos belonging to the Cirrhopetalum alliance (Orchidaceae), is described and illustrated. It is morphologically distinct from all other known species in the alliance on account of the following diagnostic characters: pseudobulbs compressed subglobose; sepals and petals with dense, reddish-purple papillae on abaxial surfaces; lateral sepals basally connivent along their lower edges, the upper edges strongly incurved and connivent at the middle and then becoming separate again towards their incurved, horn-shaped, obtuse apex; column with a single orange-yellow gland below the stigma; and stelidia well-developed, 2.5–3 mm long, truncate at base, acuminate, merging with the column wings on each side of the column. The conservation status of B. jingdongense is assessed and taxonomic notes are provided.

    Keywords: Bulbophyllum, Cirrhopetalum alliance, new species, taxonomy, Monocots



      


    Bulbophyllum jingdongense A. Q. Hu, D. P. Ye & Jian W. Li, sp. nov.  

    Distribution:— Bulbophyllum jingdongense is currently only recorded from Yunnan Province in Southwest China and Khammouane Province in central Laos.

    FIGURE 2. Bulbophyllum jingdongense, sp. nov.:
     A. Plants in natural habitat at holotype locality in Jingdong County, Yunnan Province, South China. B. Plants epiphytic on a pine tree in Jingdong County. C. Living collection from Nakai District, Khammouane Province, central Laos, brought into cultivation at the Biotechnology and Ecology Institute, Laos. D. Close-up of habit with inflorescence. E. Close-up of a single inflorescence. F. Close-up of the column, highlighting the orange-yellow gland below the stigma.
     (A, D, E & F from holotype A.Q.Hu et al. 803, photographed by A.Q. Hu; B from paratype Jian-Wu Li 4494, photographed by Jian W. Li; C from paratype HNL-KFBG 0409, photographed by S.W. Gale). 


     Ai-Qun Wu, De-Ping Ye, Stephan W. Gale, Richard M. K. Saunders, Gunter A. Fischer and Jian-Wu Li. 2017. Bulbophyllum jingdongense (Orchidaceae), A New Species in the Cirrhopetalum alliance from South China and Laos. Phytotaxa. 307(3); 199-204. DOI: 10.11646/phytotaxa.307.3.4

    A New Species of Orchid Found in Jingdong, Yunnan 


      



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