Rupr. —— LR h.S-NSus. 1928. Sa: 65d. 
ORCHIDACEAE. il 
Corysanthes. | Fst stretch iz 363 
Dot okey, , ) &'34 La 
20. CORYSANTHES R. Br. 
Dwarf very delicate succulent terrestrial herbs. Root of small rounded 
tubers on fleshy caudicles. Leaf solitary, ovate-cordate or orbicular or 
reniform. Flower solitary, large for the size of the plant, at first almost 
sessile on the leaf, but peduncle elongating considerably in fruit. Upper 
sepal large, erect and incurved, helmet-shaped ; lateral free, small and 
linear, or long and filiform. Petals similar to the lateral sepals but smaller, 
sometimes wanting. Lip large, the lower portion tubular, the margins 
meeting behind the column and enclosing it: base with a rounded auricle 
on each side of the column or with a hollow conical spur; upper part 
truncate or expanded into a broad abruptly reflexed limb; margins entire 
or denticulate or fimbriate. Column short, straight, 2-winged at the top ; 
stigma broad, placed just under the rostellum. Anther large, terminal, 
erect, 2-celled ; pollinia 4, powdery, free. 
sh 754 BOT of Wh SI, 
A very curious genus of about 20 species, found in Malaya, Australia, and New 
Zealand, the species of each country being endemic. 
A. Lip produced downwards into 2 conical spurs at the base. Lateral sepals and petals 
minute. 
Leaf +-4in., sessile, ovate-cordate .. 7. m .. L. C. Cheesemani. 
B. Lip with 2 rounded orifices at the base. Lateral sepals and petals filiform, longer than 
the lip (except in C. Carsei and Matthewsii). 
Leat 1-3 in., ovate-cordate. Lateral sepals and petals small. Lip 
produced into a projecting lamina, not truncate oF .. 2. C. Carser 
Leaf 4-lin., sessile, ovate- or orbicular-cordate. Lateral sepals 
and petals about $ as long as the lip. Lip truncate, entire 
or minutely denticulate 
Pe hs We .. 3. C. Matthewsn. 
Leaf 2-14 in., sessile, ovate-oblong, rounded or cordate at the base. 
Lip truncate, coarsely toothed or fimbriate .. =! .. 4, C. oblonga. 
Leaf 4—2in., sessile, oblong-ovate, acuminate. Upper sepal acu- 
minate. Lip bent forwards and downwards, acuminate .. 5. C. rivularis. 
Leaf 4-14 in., sessile or shortl tiolate, broadly oblong or orbicu- 
lar, apiculate. ~ Upper ml acute. Lip abruptly reflexed and 
expanded, apex acute i A A > .. 6. C. rotundifolia, 
Leaf 4-2 in., petiolate, orbicular or reniform, 3-lobed at the tip. 
Upper sepal obtuse. Lip abruptly reflexed and expanded, apex 
rounded ~ Pe 7 be ne .. 7. QC. triloba. 
Large and stout, 2-8in. high. Leaf on a pepiqle 3-3 in. long ; 
lamina 3-3 in., broadly oblong or orbicular. Upper sepal acute. 
Lip large, abruptly reflexed and much expanded s . 8. C. macrantha. 
1. ©. Cheesemanii Hook. f. ex T. Kirk in Trans. N.Z. Inst. 11 (1871) te 
180.—A very small species, }-lin. high when in flower, rarely more. 
Leaf sessile, +-4in. long, ovate-cordate or orbicular-cordate, apiculate, 
membranous, veins conspicuous when dry. Flower sessile or shortly 
peduncled, about 2in. long, dull-purple; bract short, sheathing. Upper 
sepal very large, helmet-shaped, curved over the lip, obtuse. Lateral 
sepals minute, subulate, erect, placed between the basal spurs of the lip. 
Petals frequently wanting, when present very minute, deflexed, placed 
under or behind the basal spurs of the lip. Lip very lagge, tubular, the 
margins involute and meeting behind the column and enclosing it, the 
base produced downwards on each side into a short conical spur; the 
mouth expanded and abruptly recurved; margins entire. Column short, 
stout, erect, with a large fleshy gland at the base. Anther terminal, very 
= C. Rrericeo® avn & Be, 1919 
Ryn « Oa ~eb, RKHS GD. gs. 7S: 
