ORCHIDACEAE 
Anther posterior, borne on the back of the column. 
Inflorescence simple, the rachis not branched. 
ip posterior, forming the upper member of the 
eria h. 
Lip Borne Fus the base of the column or be- 
Editora donas oiu. at the e and ad- 
Lip bo rne above the base of the column. 
Lip ene the lower member of the 
per 
Flower-stem arising from a fleshy root or 
cluster of fleshy roots: rootstock ane 
ing or not obvious. 
" SON foot short or obsolete: lateral 
s als borne obliquely on the hy- 
pandhium: scarcely, if at all, decur- 
rent. 
Anther acute, not lobed: lip with basal 
callosities. 
nen zd eleft: lip free from the 
stigma. RR lip adnate to the 
Anther notched at the apex, thus 2- 
: lip without callosities. 
Column- feet elongate: lateral sepals de- 
urrent on the hypanthium 
Lateral sepals forming a pom like 
spur at the base of the hypanthium. 
Flower-stem arising from elongate horizontal 
rootstocks. 
Foliaceous leaves alternate on the flower- 
diat lip spurless, or with only a short 
which is surrounded by the lateral 
pals 
Foliaceous leaves clustered at the base of 
n. Eg stem: lip with an extended 
r or sae between the SP sepals. 
lndorescenés. canon: the rachis bran 
V. pir 
I 
Foliage leaves, when developed, Pune n 
D “appendages, Soie ally in young plants 
a 2 ria and Aplectrum: some leaves foli- 
Foliage m always present at E time. 
Column short: lip 3-lobed at the apex 
Co elongate: lip dilated at the apex. 
Foliage prone absent A. flowering time, or some- 
times represented by mere withered a 
Lip prolonged posteriorly into an eľongate slen- 
der spur. 
Lip not prolonged into a slender spur. 
Roots or a coralloid. 
E Bor : ith a crest of about 5 longitudinal 
Pollini a de lip with a callus on each side of the 
rib near ue base 
Foliage joi vos coriaceous or firm-fleshy, always present on 
the flower-stems. 
Column without a foot, or with a very T one: lat- 
eral sepals various, but not T? ngular 
Pollinia 2-4 : evergreen epiphyte 
Petals searcely half as lene as the sepals. 
Petals nearly or quite as long as the sepals, 
19. PRESCOTTIA. 
20. CRANICHIS. 
21. PONTHIEVA. 
22. IBIDIUM. 
25. 
26. 
36. 
. CYCLOPOGON, 
. MESADENUS. 
STENORRHYNCHUS. 
PELEXIA. 
PERAMIUM. 
PHYSURUS. 
. TROPIDIA 
. MALAXIS. 
. LIPARIS 
. TIPULARIA. 
. APLECTRUM. 
. HEXALECTRIS. 
. CORALLORRHIZA. 
PLEUROTHALLIS. 
