Peristylus gracilis

纖細闊蕊蘭

Peristylus gracilis Bl.

名彙資訊

特徵描述

典藏標本

數位照片

分布位置

相關資訊

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名彙資訊

學名發表文獻

Bl., Bijdragen tot de flora van Nederlandsch Indië 8: 404. 1825. (Bijdr. Fl. Ned. Ind.)

台灣首次記錄發表文獻

Hsu, Leou, Yeh, Yeh & Chung, Taiwania 54(4): 381. fig. 1 & 2. 2009.

異名

無

各語言俗名

無

特徵描述

生活型

herb

形態特徵

Plants 15-70 cm tall. Tuberoids ellipsoid or conic ellipsoid, 1-1.5 cm long, 0.5-0.7 cm in diameter. Stem leafy at upper part, 7-50 cm long, bearing 3-5 sheathing bracts below.
Leaves 3-10, pale green on lateral sides and pale yellow-green along the midrib, linear oblong, 4-14 cm long, 0.6-2.5 cm wide, entire or undulate at margins, acute at both ends, sheathing at base.
Peduncle 6-10 cm long, glabrous, with 2-3 sheathing bracts. Raceme 3-17 cm long, bearing 3-20 flowers, floral bracts light green, lanceolate, 4-6 mm long, scattered with few dark brown spots. Flowers resupinate, light green; pedicel and ovary 6-8 mm long; dorsal sepal and petals form a hood over the column, dorsal sepal ovate, concave, 2-2.5 mm long, ca. 1.8 mm wide, blunt at apex, the petals obliquely triangular, shallowly concave, 2.5-3 mm long, ca. 2 mm wide, thick and subsimilar to sepals in texture; lateral sepals spreading, concave, 2.5-3 mm long, ca. 2 mm wide, cucullate at apex; lips deeply 3-lobed, lateral lobes spreading, linear lanceolate, 4-5 mm long, middle lobe triangular lanceolate, 2-3 mm long, ca. 2 mm wide, acute at apex, spur cylindric, 5-8 mm long, ca. 1 mm across, fusiform-clavate below; column ca. 1.2 mm tall, with rather large auricle on both sides; stigma small, placed beside auricles; rostellum minute, triangular, emarginated at apex.

物候

Flowering was observed from October to early November and fruiting from November to February.

分布

台灣 : Populations in Taiwan (Lanyu Isl.) were found under tropical rain forest at 100-200 m alt.
世界 : India (Khasia), Thailand, Peninsular Malaysia and Indonesia (Sumatra, Java, Borneo, Sumbawa and Flores).

引證標本

Taitung Co.: Lanyu: Tienchih trail, ca. 150 m alt., 14 Nov 2004, Hsu 132 (TAIF); 27 Oct 2006, Chung 8389, 8390 (TAIF); 31 Jan 2006, Yeh & Yeh s. n. (PPI). Oubenlin, ca. 200m alt., 23 Feb 2007, Yeh & Yeh s. n. (PPI); 2 Nov 2007, Yeh s. n. (PPI).