KEY TO SUB-CLASSES, ORDERS AND GENERA. 189 
CXIV--ORCHIDACE Ai— cont. 
(**) Lip spurred, adnate to the colamn or its foot :— 
(t) Column prolonged into a long foot ; lip not jointed to the 
foot, spur with no callus or septum within, ascending or 
recurved :— a fas » ae sy omxxxiv—Aerides. 
(tt) Column with little or no foot :— 
(§) Spur single, with neither calli nor septum within ; 
lip not jointed :-— 
(|) Spur compressed laterally, deep, pubescent at the 
mouth, side-lobes none:— ... cemxxxii—Rhynchostylis, 
(|) Spur not compressed, long, narrow and cylindric, 
or wide funnel shaped, or short and saccaté 
(rarely-one Vanda-reduced to a gibbous swelling, 
and then the leaves flat) :— 
(t) Side-lobes of lip usually large; spur wide funnel- 
shaped, glabrous at the mouth (if side-lobes small, 
® then spur subobsolete); flowers large; caudicle 
of pollinia very broad:— ... ..  nxxxv—Vanda. 
(tt) Side-lobes of lip small or none; spur narrow 
cylindric, or short and wide saccate, mouth 
~ naked or fimbriate; flowers small; caudicle 
very narrow :— “oe ..  emxxxvy—Saccolabium. 
(§§) Spur single, partially or completely occluded by calli 
within ; lip not jointed :— 
(||) Spur partially occluded by ealli within, and divided 
by a vertical antero-posterior septum into 2 
lateral chambers :— sis emxxxvii—Sarcanthus, 
(|||) Spur oceluded by a dorsal scale or by callion the 
anterior and posterior walls, but without a 
septum :— vis oes emxxxviii—Cleisostoma, 
(§§§) Spur double, short; lip jointed to the base of the 
very short 2-auricled column ; flowers’ small, in 
spiciform racemes :— =e .» ¢emxl—Diplocentrum. 
(RB) Anther dorsal (except Teniophyllum) ; pollinia 4:— 
(a2) Stem pseudobulbous, 1-leaved; flowers minute in terminal 
racemes ; sepals and limb erect ; column without a foot :—- 
crxli (bis.).—Thelasis. 
(b) Stem not pseudobulbous :— 
(a) Dwarf, stemless, leafless when flowering ; leaves linear ; roots 
flattened ; flowers minute, spicate; sepals, petals, and lip 
connate at base, latter spurred :— .s  omxxxix—Tniophyllum. 
(8) Stems tufted, fleshy; leaves equitant, laterally compressed, 
distichous ; flowers small interminal racemes; sepals erect ; 
lip jointed to foot of column, clawed, erect, and with a basal 
appendage :— ... ee Bie ae Bae cmxli—Podochilus. 
(ii) Pollinia granular or in small masses, 2—4-cohering by their sides 
without gland or caudicle; anther terminal ; climbers; leaves coriaceous to 5 
fleshy, or none ; flowers large axillary; sepals spreading or broadly concave ; 
lip with claw aduate to, and limb broad: concave and embracing, the column, 
whick is elongate :— es ee Ba at aaa ae ... ¢emxlii—Vanilla. 
CX V—SCITAMINACE A-— 
(I) Stamens, 1 only perfect, 4 others reduced to staminodes or wanting :— 
(i) Anther 2-celled; calyx tubvlar or spathaceous; style slender, embraced 
below the stigma by the anthers; placentas many-ovuled, embryo central 
straight :— 
(1) Ovary 1-celled, placentas 3 parietal; stigma turbinate ; flowers 
yellow or orange, in terminal panicles ; corolla tube long; stem leafy :— 
. a cmxliii—Globba, 
(2) Ovary 3-celled, placentas axile :— 
(A) Lateral staminodes broad, filament long narrow, connective not 
crested, nor spurred at base; corolla tube long, slender; stigma 
subglobose ; flowers yellowish or white in terminal spikes at top 
of leafy stem:— ... see i: ia .. emxliv—Hedychium, 
