Range extension of Christisonia scortechinii from mainland Southeast Asia into Borneo, and notes on the distinction between Aeginetia and Christisonia (Orobanchaceae)

van der Ent, Antony and Wong, K. M. (2015) Range extension of Christisonia scortechinii from mainland Southeast Asia into Borneo, and notes on the distinction between Aeginetia and Christisonia (Orobanchaceae). Botanical Studies, 56 1: 28.1-28.10. doi:10.1186/s40529-015-0109-3


Author van der Ent, Antony
Wong, K. M.
Title Range extension of Christisonia scortechinii from mainland Southeast Asia into Borneo, and notes on the distinction between Aeginetia and Christisonia (Orobanchaceae)
Formatted title
Range extension of Christisonia scortechinii from mainland Southeast Asia into Borneo, and notes on the distinction between Aeginetia and Christisonia (Orobanchaceae)
Journal name Botanical Studies   Check publisher's open access policy
ISSN 1999-3110
Publication date 2015-10-05
Sub-type Article (original research)
DOI 10.1186/s40529-015-0109-3
Open Access Status DOI
Volume 56
Issue 1
Start page 28.1
End page 28.10
Total pages 10
Place of publication Heidelberg, Germany
Publisher SpringerOpen
Collection year 2016
Language eng
Formatted abstract
Background: Christisonia is a little-documented and poorly studied root-parasitic genus in the Orobanchaceae occurring in India, China, Indochina and part of the Malesian region. Recent collection of a Christisonia taxon in Kinabalu Park in Sabah, Borneo, taxonomically identical to earlier Sabah collections that have hitherto not been recorded in the literature, led to an assessment of the taxonomic identity of the species against Christisonia scortechinii, C. siamensis, C. sinensis and related species.

Results: Some taxa in China, Indochina, the Malay Peninsula, and the Philippines are morphologically identical to the Borneo taxon except in the number of calyx lobes, but differ by several distinctive characters from other well-distinguished species in the region. Studies of dried herbarium specimens, augmented by photographic images of different stages of fresh flowering material and a scrutiny of available descriptions confirmed that the calyx has two primary lobes in the bud that may separate into 3–5 portions, giving a variable number of apparent lobes in specimen material collected at different localities. This new scrutiny of the calyx also permitted an improved description of the calyx differences that separate Christisonia and the closely related Aeginetia, which have not been clearly elucidated in the past.

Conclusions: Christisonia scortechinii Prain (Orobanchaceae), the only species that was described as having an initially spathaceous calyx among species of this root-parasitic genus, is newly recorded for Borneo (including Kinabalu Park, where its presence has been overlooked). The range of the species in mainland Southeast Asia, previously extended from Peninsular Malaysia to Thailand and Vietnam, is here further extended to Laos and China. Christisonia wightii Elmer (relevant to the Philippines) and C. sinensis Beck (China) are reduced to synonymy.
Keyword Aeginetia
Borneo
China
Christisonia
Kinabalu
Laos
New record
Orobanchaceae
Philippines
Ultramafics
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes http://www.as-botanicalstudies.com/content/56/1/28

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Mined Land Rehabilitation Publications
Official 2016 Collection
 
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Created: Wed, 28 Oct 2015, 06:28:13 EST by Mr Antony Van Der Ent on behalf of Centre For Mined Land Rehabilitation