生活型

herb

形態特徵

• Terrestrial herbs. Rhizome short creeping at base, ascending at top and forming a stem 10-15 cm tall, 0.4-0.5 cm in diameter.
• Leaves 3-6, spiral, distant, long petiolated; blade elliptic-ovate, 5-7 cm long, 2.6-3.1 cm wide, acute at both ends, entire but with a few waves at margins, light green, glabrous, 3-nerved, veinlets reticulated; petioles 2.9-3.5 cm long, sheathed at base.
• Inflorescence terminal; peduncle 15-24 cm long, nearly glabrous at base, hairy toward apex, with 4-5 sheathed bracts, lower bracts glabrous, upper ones with short hairs at back, ciliate at margins, 3-nerved; raceme bearing few to 14 flowers, 4-8 cm long, elongating during anthesis, rachis hairy, floral bracts up to 10 mm long, hairy outside, ciliate at margins. Flowers resupinate, half-opened; ovary hairy, 5-7 mm long; sepals free, unequal, hairy outside, red light brown below, turning white near apex, the dorsal one oblong, boat-shaped, 4.5-5.2 mm long, the lateral ones elliptic-ovate, oblique, 4.7-5.3 mm long; petals oppressed to the dorsal sepal and with it forming a hood, the inner margins jointed together at upper part or free from each other, falcate after flattened, 4.5-5.2 mm long, white; lip free from the column, 4.5-5.5 mm long, oblong in outline when flattened, light red-brown and saccate at base, bearing a short central keel and 2 continuous lateral keels or 2-6 discontinuous protruding within, 3-lobed and white at apex, the lateral lobes thickened, smooth inside, bearing short and erect prickles or reflexed stout hairs at outer surfaces, the middle lobe reflexed, triangular-semicircular, acute at apex; column erect, 3.3-3.8 mm long, adorned with 1-3 anthers, i.e., additional two or one stamens often present on the ventral side, rarely absent; dorsal anther lying on the clinandrium and sessile, larger, ca. 2.5 mm long, anthers on ventral side independent and distinctly stalked, smaller, ca. 2.2 mm long; pollinia from the dorsal anther 2, each in 2-partite, 3mm long, the tapered apex often attached to the viscidium, pollinia from ventral stamens smaller, 2.5 mm long; stigma single, on ventral side of column; rostellum straight; viscidium small, oblong.

物候

Flowering period: February to March.

分布

• 台灣 : in forest around Mt. Koto, Tienchi and Oubenlin, Lanyu (Orchid Island, Botel Tabago, Fig. 3), Taitung.

引證標本

Taitung Co.: Mt. Koto, C. R. Yeh 4068 (PPI) 2 Feb 2006 (HoloTYPE), Tienchi, C. R. Yeh 4069 (PPI) 22 Feb 2006, Oubenlin, 4070 (PPI) 2 Feb 2006. The holotype is deposited in the herbarium PPI.