Thunia.] 
CXXXVI. ORCHIDE^. 
125 
34 . THUNIA, Rchb. fil. 
Stems tall, leafy. Leaves distichous, narrow acuminate. Flowers 
large in a pendulous terminal short raceme large white (or purple). 
Bracts nearly as long as flowers, persistent. Sepals and petals 
narrow acuminate. Lip convolute spurred, margin fimbriate. 
Column tall, no foot. Pollinia 8, two outer pairs longer than 
inner ones. Species 4 or 5, Indian, Siamese and Chinese. 
(1) Th. alba Rchb. fil. Bot. Zeit. 1852, 764. Phaius albus Lindl . 
Wall. Cat. 3749; Bot. Mag. 3991. 
Stems 18 in. tall or more, fleshy, glaucous. Leaves linear- 
lanceolate acuminate glaucous, 6 in. long, 1 in. wide. Raceme 
3 in. long. Flowers 4 to 8. Bracts 1-5 to 2 in. long, narrow boat¬ 
shaped. Sepals and petals oblong-lanceolate acuminate, 2-5 to 
3’5 in. long, white. Lip much shorter, white with purple pink 
veins, edge crisped fimbriate. Column long, straight, wings rather 
large. Hab. Setul, Bukit Rajah Wang (Haniff). Distrib. Sikkim, 
Burma, Siam. 
35 . ARUNDINA, Bl. 
Terrestrial woody herbs with narrow grassy leaves. Flowers 
showy in a short simple or sparingly branched terminal raceme. 
Bracts ovate persistent. Sepals lanceolate. Petals wider. Lip 
3-lobed convolute round column, midlobe round, crisped, 2 or more 
raised nerves on disc. Column tall dilate above winged; anther 
helmet-shaped. Pollinia 8, in pairs on a disc. Capsule oblong. 
Species 5 or 6; Indo-Malaya, China. 
Flowers large pink; petals ovate very broad; no 
yellow on lip or very faint . . . . (1) A. bambusifolia 
Flowers smaller; sepals and petals white, or tinted 
rose, a yellow patch on lip . . . (2) A. speciosa 
Flowers very small, pink; leaves very narrow, 
revolute when dry . . . . . {3) A. revoluta 
(1) A. bambusifolia Lindl. Gen. and Sp. Orch. PI. 125. A. 
speciosa Ridl. Mat. i. 124 (not of Blume). A. densa Lindl. Bot. 
Reg. xxviii. t. 38. 
Stems 3 to 7 ft. tall. Leaves linear acuminate, 2 to 8 in. long, 
•3 to *5 in. wide. Raceme not or rarely branched, 6 to 8 in. long, 
few-flowered. Bracts ovate acuminate. Flowers very large; pedicel 
x in. long. Sepals lanceolate rose pink, 1 in. long. Petals broader, 
1*75 in. long, 1 in. wide, ovate cuspidate. Lip as long, deep pink 
(not yellow in centre), keels on lip 3. Capsule 3 in. long. Hab. 
Rocky spots in mountains, especially in gravelly islands in streams. 
Common. Johor, Gunong Janeng (Kelsall); Endau River. Pahang, 
Talian River; Gunong Tahan (Ridley), Malacca, Mt. Ophir (all 
collectors). Perak, Gunong Kerbau (Robinson); Batang Padang 
valley (Wray). Distrib. Himalayas. 
The lowland and gravelly island forms have often smaller flowers with 
occasionally some yellow in the lip and narrower leaves. The Ophir and 
Kerbau flowers are very large and deep coloured. 
