Pholidota advena (Par. & Rchb. f.) Hook. f., A Newly Recorded Species of Orchidaceae from China

WU Qiu-ping, YE De-ping, WU Kun-lin, FANG Lin, ZENG Song-jun*, LI Lin*

(Par. & Rchb. f.) Hook. f., A Newly Recorded Species of Orchidaceae from China

WU Qiu-ping1,2, YE De-ping3, WU Kun-lin1, FANG Lin1, ZENG Song-jun1*, LI Lin1*

(1. South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. Forest Bureau of Pu’er,Pu’er 665000, Yunnan, China)

(Par. & Rchb. f.) Hook. f., an epiphytic orchid from southern Yunnan is newly recorded for China. The detailed description and photos of this species are provided. This species is morphologically similar toLindl., from which it clearly differs in its hypochile with 3–5 elevated, lamellate keels, and epichile with 3 more or less wavy keels which converge toward the apex.

; Orchidaceae;; Taxonomy; New record; China

The genusLindl. ex Hook. was esta- blished by W. J. Hooker[1]. It belongs to the subtribe Coelogyninae, subfamily Epidendroideae (Orchidaceae), and comprises about 30 species widespread in the tropical and subtropical regions of the Old World, extending from the Pacific Islands to northeast Australia, Malaysia, South-east Asia and southern China[2]. Members ofare featured by the lip with a relatively short, boat-shaped hypochile, rather short and compact column[3]. In China, 14 species have been recorded[4–6].

During our recent field survey in southern Yunnan, a species ofwas discovered. After extensive morphological comparisons based on relevant literature[7–9]and herbarium specimens, it was identified as(Par. & Rchb. f.) Hook. f., a new record to the Chinese orchid flora.

(Par. & Rchb. f.) Hook. f., Fl. Brit. India 5: 846. 1890; Grant, Orch. Burma 160. 1895. ——Par. & Rchb. f., Otia Bot. Hamb. 1: 47. 1878. 高褶石仙桃Figs. 1, 2

Type: Myanmar, Tenasserim, C. S. P. Parish 296 (holotype: K!, isotype: W).

Description:Epiphytic herb. Plants 10–20 cm high. Rhizomes stout, short with roots, 3–6 mm in diam. Roots few, arising from apex of rhizome. Pseudobulbs in cluster, ovoid-cylindric, tapering toward the apex, 2.2–5 cm long. Leaves 2 per pseudobulb, oblong-lanceolate, 7.5–11 cm, apex acuminate; petiole 0.7–2 mm long. Inflorescence a raceme, synanthous, arising from developed young leaves near base of last pseudobulb, 7–10 cm. Rachis more or less pendulous, more or less zig-zag, nearly straight, 5–10-flowered. Floral bracts persistent, ovate to ovate lanceolate, 8–12 mm, apex acute to obtuse, membranous. Flowers whitish, tinged with light green, not opening widely; pedicel and ovary 4–8 mm long. Dorsal sepal ovate, strongly concave, 5–8 mm long, apex obtuse to acute, 5-nerved; lateral sepals ovate- oblong, somewhat oblique,8–10 mm long, apex acute. Petals spathulate to obovate, narrowed toward the base, 7–8 mm long, 3–4 mm wide. Lip broadly oblong in outline, contracted at apical 1/3 into hypochile and epichile; 7–8 mm long; hypochile cymbiform,5– 6 mm long, 3.5–4.5 mm wide, with 3–5 lamellate keels near base; epichile two-lobed, transversely elli- ptic, wider than hypochile, 2.3–2.5 mm long, central part with three swollen, more or less wavy keels which converge to the apex; lateral lobes semi- orbicular, apex obtuse. Column stout, 4.5–5 mm long, with a rather small, wing-like hood which is shorter than the stigma. Anther more or less transversely elliptic in outline. Pollinia 4 in 2 pairs, pear-shaped. Stigma 3–3.5 mm by 1.5–2 cm, narrowly elliptic in outline; rostellum more or less broadly band-like, semi-orbicular to semi-elliptic. Capsule not seen.

Fig. 1 Pholidota advena. A: Habit; B: Flower (frontal view); C: Flower (side view); D: Inflorescence; E: Dorsal sepal and lateral sepals; F: Petals; G: Lip and column; H: lip (showing keel); I: Column (ventral view); J: Pollinaria. Bars: C, E–I=4 mm; J=2 mm

Phenology:Flowering was observed in mid- September.

Distribution and habitat: Previously recorded from Myanmar (Tenasserim), newly recorded from Ximeng Wa Autonomous County, Pu’er City, Yunnan Province, China, whereit grows as an epiphyte on tree trunks along the river in the rainforest, at an elevation 800 m. a.s.l. Q. P. Wu 90 (IBSC).

Conservation status: The species has not been seen in the wild for many years since it was first discovered in Myanmar. Currently information is known only from one location with mature individuals confined to a small forest patch in Yunnan, China. Considering there are not enough information about the populations of this species at present, it is suggested that the species could evaluated as DD (data deficient)[10]. We hope our findings could receive extra conservation attention.

Notes:was classified into a separate sectionby de Vogel[3]depending on its special morphological characteristics. This species shows some similarities toLindl., but it differs in having a distinctive lip that has prominent keels in the hypochile and two-lobed epichile with three elevated, more or less wavy keels.

We would like to thank curators and staff of the herbaria BM, E, IBSC, K, KUN, P and PE for providing ongoing access to their specimens or digital images. Special thanks are due to Dr. Shi-jin Li for guidance on photos processing.

[1] HOOKER W J. Exotic Flora, Containing Figures and Descriptions of New, Rare or Otherwise Interesting Exotic Plants, Vol. 2 [M]. Edin- burgh: W. Blackwood & London: T Cadell, 1825: 138.

[2] PRIDGEON A M, CRIBB P J, CHASE M W, et al.[M]// Genera Orchidacearum 4, Epidendroideae (Part one). Oxford: Oxford University Press, 2005: 76–81.

[3] DE VOGEL E F. Revisions in Coelogyninae (Orchidaceae) III, the genus[J]. Orchid Monographs, 1988, 3(1): 1–78.

[4] Chen S C, Wood J J.[M]// Wu Z Y, Raven P H, Hong D Y. Flora of China, Vol. 25. Beijing: Science Press & St Louis: Missouri Botanical Garden Press, 2009: 335–339.

[5] XU Z H, JIANG H, YE D P. The Wild Orchids in Yunnan [M]. Kunming: Yunnan Publishing Group Corporation and Yunnan Science & Technology Press, 2010: 275–281. (in Chinese)

[6] LI L, QIN M, WANG W Y, et al. The taxonomic identities ofand(Orchidaceae, Coelogyninae) [J]. PhytoKeys, 2019, 136(1): 97–106. doi: 10.3897/phytokeys.136.46705.

[7] HOOKER J D. The flora of British India [M]. London: Chenopo- diaceae to Orchideae. L. Reeve and Co. Ltd, 1890: 844–847.

[8] SEIDENFADEN G. Orchid genera in Thailand: XIII. Thirty-three Epidendroid genera [J]. Opera Bot, 1986, 89: 96–106.

[9] SEIDENFADEN G. The orchids of Indochina [J]. Opera Bot, 1992, 114: 121–128.

[10] IUCN. Guidelines for using the IUCN red list categories and criteria, version 14 [M]. UK: Gland, Switzerland and Cambridge, 2019: 5–98.

高褶石仙桃，中國蘭科一新記錄種

吳秋萍1,2, 葉德平3, 吳坤林1, 房林1, 曾宋君1*, 李琳1*

(1. 中國科學院華南植物園, 廣州 510650; 2. 中國科學院大學, 北京 1000493; 3. 云南省普洱林業局, 云南 普洱 665000)

報道了中國蘭科植物一新記錄種：高褶石仙桃[(Par. & Rchb. f.) Hook. f.], 并提供了描述與圖片。該種與石仙桃(Lindl.)相似, 但下唇具3～5個明顯隆起的片狀脊以及上唇有3個波浪狀龍骨一直向頂端延伸匯合。

高褶石仙桃; 蘭科; 石仙桃屬; 分類學; 新記錄; 中國

10.11926/jtsb.4367

2020–10–23

2021–01–22

This work was supported by the National Natural Science Foundation of China (Grant no. 31770215).

WU Qiu-ping (Born in 1994), Female, Graduate student, interesting in plant systematics. E-mail: wuqiuping18@mails.ucas.ac.cn

. E-mail: zengsongjun@scib.ac.cn, lilin@scib.ac.cn