Castanopsis multiporcata N. H. Xia &amp; D. H. Vuong 2014, sp. nov.
Creators: name: Vuong, Duy Hung
name: Xia, Nian-He
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fagales
Fagaceae
Castanopsis
Castanopsis multiporcata

description: <i>Castanopsis multiporcata</i> N. H. Xia &amp; D. H. Vuong, sp. nov. (Figs. 3, 4) <b>Diagnosis:—</b> The species is similar to <i>Castanopsis buruana</i>, but it can be easily distinguished from the latter by having leaf blade 5–8 cm long (vs. 10–15 cm), papery firmness (vs. thinly leathery), abaxially glabrescent (vs. dense stellate hairs), petioles 0.3–0.7 cm long (vs. 1–1.5 cm), cupules 2–2.5 cm diameter (vs. 1–2 cm diameter) and concave scar (vs. flat or convex). <b>Type:</b> — VIETNAM. Phu Tho: Tan Son District, Xuan Son National Park, Ten mountain, 21º07.246′ N, 104º56.295′ E, 832 m, 24 October 2012, <i>D. H. Vuong 2012102407</i> (holotype VNF!; isotypes IBSC!, VNF!, VNM!, XSNP!). Trees, 20–30 m tall, to 80 cm in diameter; bark gray and smooth, branches glabrous, with slightly raised lenticels. Terminal buds ovoid or ovoid-elliptic, 2–5 × 2–3 mm, glabrescent, fimbriate. Stipules narrowly lanceolate, glabrous, 6–7 × 1–1.5 mm, caducous. Petiole 0.3–0.7 cm, glabrous. Leaf blade elliptic, sometimes obovate-elliptic or oblong elliptic, 5–8 × 2–3 cm, papery firmness, adaxially glabrous, abaxially with tight, thin, brown thin-walled peltate trichomes, without non-glandular trichomes, base cuneate, margins entire, apex acute or acuminate; midvein adaxially slightly raised from base to middle but flat to slightly impressed from middle to apex; secondary veins 6–10 on each side of midvein, slender. Male inflorescence rachis pubescent. Female inflorescences 8–15 cm, rachis sparsely and shortly hairy, flower solitary per cupule, styles 3. Infructescence rachis 2–2.5 mm thick, glabrous, sparsely lenticellate. Cupule conical or subglobose, 2–2.5 cm in diameter outside and spines pubescent and with yellowish brown scales, inside dense brown villus, wall 0.5–1 mm thick and exterior visible through spines; spines 5–7 mm long, basally connate and transversely united across 4–5 rings. Nut 1 each cupule, conical, 1–1.5 cm in diameter, densely brown pubescent, 10–11 obviously ridges in cross section; scar concave, 0.8–1.2 cm in diameter. <b>Distribution and habitat:</b> — <i>C. multiporcata</i> is endemic to Xuan Son National Park, Phu Tho Province in the North Vietnam. It grows sparsely in evergreen broad-leaved forest on the slope of limestone mountains at the elevation of 650– 850 m. Associated species at the type locality include <i>C. tonkinensis</i> Seemen (1897: 55) (Fagaceae), <i>Pometia pinnata</i> J. R. Forster &amp; G. Forster (1775: 110) (Sapindaceae), etc. <b>Conservation:</b> —Only a few small populations of this taxon are found in Ten mountain and well conserved in the Xuan Son National Park. According to IUCN Red list Categories and Criteria (IUCN 2012), <i>C. multiporcata</i> should be categorized as Data Deficient (DD). More information about the ecology of this species and the extent of the habitat in Indo-China and southwest China regions are needed. <b>Phenology:</b> —Its flowering period extends from August to September and fruiting from October to November of the following year. <b>Etymology:</b> —The species epithet “ <i>multiporcata ”</i> refers to the nut with 10–11 ridges in cross section. <b>Paratypes</b>:— VIETNAM. Phu Tho: Tan Son district, Xuan Son National Park, Ten mountain, 21º07.162′ N 104º56.610′ E, 654 m, 26 May 2011, <i>D. H</i> <i>.</i> <i>Vuong 2011052601</i> (VNF!); <i>loc. cit.</i>, 21º07.246′ N 104º56.295′ E, 832 m, 9 February 2012, <i>D. H. Vuong</i> 2012020901 (IBSC!, VNF!); <i>loc. cit.</i>, 7 May 2012, <i>D. H. Vuong</i> 2012050701 (VNF!); <i>loc. cit.</i>, 15 August 2012, <i>D. H. Vuong</i> 2012081501 (IBSC!, VNF!). <b>Similar species:</b> —The new species is similar to <i>C. buruana</i> Miquel (1863: 120) in leaf shape, cupule spines and hairy conical nuts with some ridges in cross section, but can be distinguished from the latter by having leaf blade 5–8 cm long (vs. 10–15 cm), papery firmness (vs. thinly leathery), abaxially glabrescent (vs. dense stellate hairs), petioles 0.3–0.7 cm long (vs. 1–1.5 cm), cupules 2–2.5 cm diameter (vs. 1–2 cm diameter) and concave scar (vs. flat or convex).
description: Published as part of <i>Vuong, Duy Hung &amp; Xia, Nian-He, 2014, Two new species in Castanopsis (Fagaceae) from Vietnam and their leaf cuticular features, pp. 29-41 in Phytotaxa 186 (1)</i> on pages 34-37, DOI: 10.11646/phytotaxa.186.1.2, http://zenodo.org/record/5146899
description: {"references": ["Seemen, K. O. V. (1897) 13 neue Arten Fagaceen aus dem Herbar des Koniglichen botanischen Museums zu Berlin. Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 23 (5): 47 - 56.", "IUCN (2012) IUCN Red List Categories and Criteria: Version 3.1. Second edition. Gland, Switzerland and Cambridge, UK. Available from: http: // jr. iucnredlist. org / documents / redlist _ cats _ crit _ en. pdf (accessed 2 May 2013)", "Miquel, F. A. W. (1863) Adnotationes de Cupuliferis. Annales Museum Botanicum Lugduno-Batavi 1: 102 - 121."]}