166 KEY TO SUB-CLASSES, ORDERS AND GENERA, 
LXXV—ASCLEPIADACE Ai—cont. 
(b) Flowers in umbelliform or racemose cymes ; coronal processes 
fleshy, adnate to the very short column :— ,.. dexxiii--Tylophora. 
(c) Flowers in axillary umbelliform cymes ; corona of 5 laterally 
compressed ecales, adnate vertically to the backs of the 
anthers, with free tipe and spurred bases:-- dcxxiii—Pentatropis. 
(2) Corolla campanulate, funnel-shaped, or salver-shaped ; climbers with 
opposite leaves :— 
(A) Flowers large (1 inch or more in Jength or diameter) :— 
(a) Flowers white, fragrant, salver-shaped with cylindric tube dila- 
ted both at the mouth and at the base, in umbelliform 
cymes ; coronal scales 5, erect, often free at tips :— 
dexxxli—Stephanotis. 
(b) Flowers white or rosy, with purple veins, campanulate or urceo- 
late (rarely rotate), solitary or in racemose or umbelliform 
cymes : corolla ciliate ; corona double, corolline annular at 
base of corolla, staminal of 5 scales, adnate to bases of sta- 
mens, base cordate and 2-keeled within :— ...  decxxi—Oxystelma. 
(B) Flowers medium sized :— 
(a) Flowers pale blue, changing through purple to lilac, campanu- 
late or sub-globular, with oblong spreading lobes and short 
tube, in few flowered umbelliform cymes :— dcexxv—Oxypetalum. 
(b) Flowers greenish white, ciliated, funnel-shaped, with ovate 
spreading lobes and short tube, in racemiform or corymbi- 
form axillary cymes ; corona double, an outer annular 5-lobed 
membrane, and 5-cumpressed scales, adhering to the anthers, 
free tipped and spurred behind ; follicle echinate ; fetid :— 
dexxiv—Demia. 
(c) Flowers yellow (whitish or greenish) or orange, salver-shaped, 
sometimes fragrant, with oblong or linear lobes, tube swol- 
len below, in subumbelliform cymes ; coronal scales membra- 
nous, largish, notched, at the back of the anthers :— 
dexxxi-—Pergularia. 
(C) Flowers small (under 3 inch diameter) :— 
(a) Flowers in axillary dichotomous cymes; corolla glabrous with 
narrow spreading recurved lobes and short tube ; coronal 
scales minute, adnate to column :— ... .. dexix-—Toxocarpus. 
(b) Flowers in crowded umbelliform cymes ; corolla with thick 
twisted lobes and usually a short tube; corona of 5 fleshy 
processes in the throat, or reduced to a double villous ridge 
below the Sinuses:—__... ae bc ... dexxix—Gymnema. 
(c) Flowers in umbelliform cymes ; corolla either minute cylindric 
shortly 5-cleft and mouth closed by a brush of hairs, or small 
subcampanulate with fleshy spreading lobes; coroual scales 
5 erect subulate, adnate dorsally to anthers :— dcxxx——-Marsdenia. 
(ii) Corolla lobes valvate in bud :-- 
(1) Shrubs ; leaves opposite :— 
(A) Flowers medium to large, purple, mauve or white, broadly 
campanulate, in umbelliform or subracemose cymes ; coronal 
scales 5-fleshy, laterally compressed, dorsally spurred, radiating 
from the large staminal column ; Jeayes ovate-cordate :— 
dexxii—Calotropis. 
(B) Flowers medium, white, rotate, on many flowered interpetiolar 
peduncles ; corona of 5 conduplicate scales radiating from the 
top of the column ; leaves linear-lanceolate : - 
aexlii—Gomphocarpus. 
(2) Climbers ; leaves opposite :— 
(A) Flowers funnel-or flask-shaped with tube dilated, or not, at base 
and mouth, and curved or straight, medium to large sized, white, 
yellow, greenish, purple, or spotted; corolla lobes broad or 
narrow, erect or incurved and cohering at the tips, often 
ultimately recurved or reflexed; inflorescence of umbelliform 
