ASCLEPIADE^E. I. CEROPEGIA. 



109 



4. Stamineous tube or gynostegium naked. Corona wanting. 



69 METASTE'LMA. Throat of corolla campanulate, crowned 

 by 5 teeth, which run down the tube. 



70 MICROLOMA. Throat of corolla urceolate, naked. Scales 

 in the tube 5, inclosed, alternating with as many fascicles of 

 hairs. 



71 ASTE'PHANUS. Throat of corolla suburceolate, naked; 

 tube rather hairy. 



72 PEXTASA'CHME. Corolla rotate; throat crowned by 5 

 scales. Anthers free. Pollen masses fixed above the middle. 



73 HYBANTHE'RA. Corolla rotate. Anthers gibbous on the 

 back. Stigma mutic. 



TRIBE IV. 



SECAMONEX. Pollen masses 20, erect, smooth, that is 4 to 

 each anther, trhich are fixed to the tops of the 5 exsulcate cor- 

 puscles of the stigma. Filaments connate, appendiculate outside. 

 Corolla rotate. 



74 SECAMONE. Corona 5-leaved ; leaflets compressed later- 

 ally, fixed longitudinally by the margins, simple, averse. 



75 TOXOCA'RPUS. Corona 5-leaved ; leaflets flattish on the 

 back, and furnished with a little segment. 



76 GOSIOSTE'MMA. Corona tubular, 5-angled, 5-lobed, ad- 

 hering to the base of the gynostegium. 



TRIBE V. 



PERIPLOCE.E. Pollen masses 5-20, granular (each granule 

 composed of 4 sperules), applied singly or by fours to the dilated 

 free top of each corpuscle of the stigma. Filaments partly or 

 altogether distinct. Anthers connivent. 



77 HEMIDE'SMUS. Filaments combined at the base, but dis- 

 tinct at top, inserted in the tube. Anthers cohering, beardless. 

 Pollen ^nasses applied by fours to each corpuscle of the stigma. 

 Corolla rotate : having 5 mutic scales inserted in the throat, 

 under the sinuses. 



78 BRACHY'LEPIS. Filaments broad, short, distinct, inserted 

 in the upper part of the tube. Anthers cohering, beardless. 

 Pollen masses applied by fours to each corpuscle of the stigma. 

 Corolla rotate : having 5 short, mutic segments in the throat, 

 under the recesses ; tube clothed with a broad, fleshy scale 

 inside. 



79 STREPTOCAU'LON. Filaments distinct, inserted in the 

 tube. Anthers cohering by the base, but free and beardless at 

 top. Pollen masses fixed singly to each corpuscle of the stigma. 

 Corolla subrotate ; throat crowned by 5 short aristate scales 

 under the sinuses ; anthers flexuous, erect, filiform, straight at 

 the apex. 



80 DECA'LEPIS. Filaments distinct, inserted in the upper 

 part of the throat, along with the 5 upper scales, and com- 

 bined with them to tlie middle. Anthers cohering at the 

 base, but distinct at top and beardless, ending each in a sub- 

 dilated appendage. Pollen masses as in Streptocaulon. Corolla 

 subrotate, crowned by 5 oblong-oval, flat, mutic scales, in the 

 throat under the sinuses ; and furnished with 5 linear, obtuse 

 scales in the tube. 



81 FINLAYSONIA. Filaments distinct, inserted in the throat 

 inside tubercles. Anthers cohering at the base, each terminated 

 by a broad ovate point. Pollen masses as in Hemidesmus. 

 Corolla rotate ; having the throat crowned by 5 awned tuber- 

 cles, under the sinuses ; awns capillary, erect, hooked at apex. 



82 PERIPLOCA. Filaments distinct. Anthers combined, 

 bearded. Pollen masses applied singly to each corpuscle of the 

 stigma. Corolla rotate : having 5 aristate scales in the throat. 



83 PHTLLANTHE'KA. Filaments distinct. Anthers cohering, 

 beardless, ending each in a dilated, foliaceous membrane. 

 Pollen masses applied by fours to each corpuscle of the stigma. 

 Corolla deeply 5-parted ; throat naked ? 



84 LEPOSMA. Anthers inserted above the base of the tube 

 of the corolla. Pollen masses fixed by pairs to each corpuscle 

 of the stigma. Corolla rotate, furnished with 5 fleshy scales in 

 the throat, which cowjr the genitals. 



85 GYMNANTHE'EA. Filaments distinct. Anthers cohering, 

 beardless. Pollen masses fixed by fours to each corpuscle of 

 the stigma. Corolla salver-shaped. 



86 CRYPTOSTE'GIA. Filaments distinct, short, inserted in the 

 bottom of the tube of the corolla. Anthers cohering, inclosed. 

 Pollen masses fixed singly to each corpuscle of the stigma. 

 Segments of calyx long, lanceolate. Corolla campanulatelv 

 funnel-shaped ; tube furnished with 5 bipartite scales inside, 

 which cover the anthers, being opposite them. 



Tribe I. 



ORTHOPHURA'MI-E (from op6oe, orthos, straight, and 

 (jtvpofia, phurama, a mass ; in reference to the pollen masses 

 being erect). Asclepiadeae verae, part. R. Br. in mem. wern. 

 soc. 1. p. 21. Pollen masses 10, erect (f. 15. d.) or connivent, 

 smooth, waxy, fixed by pairs (f. 15. c.) to the 5 corpuscles of 

 the stigma ; that is 5 anthers, separable into 2 parts by a lon- 

 gitudinal furrow, (f. 15. c.) t 



SOBTRIBE I. STAPBLIE'JE. Pollen masses fixed by the base 

 or beneath the middle of the side, lying on the stigma. Anthers 

 simple at top, that is, not terminated by a membrane, (f. 15. d.) 



1. Column of fructification, or gynostegium inclosed. Sta- 

 mineous corona appendiculate outside. 



I. CEROPE'GIA (from fnpoe, wax, and mjyij, pege, a foun- 

 tain ; in reference to the waxy pollen masses). R. Br. in mem. 

 wern. soc. 1. p. 21. Wight and Arnott, contrib. ind. hot. p. 29. 

 Isaura, Comm. in Poir. encycl. 3. p. 185. Stephanotis, Pet. 

 Th. nov. gen. mad. no. 35. in Rcem. coll. p. 203. Juss. ann. 

 mus. 15. p. 347. Ceropegia species, Lin. and others. 



LIN. SYST. Pentdndria, Digynia. Calyx 5-parted. Corolla 

 funnel-shaped, more or less ventricose from the base ; segments 

 of the limb narrow, cohering at the apex. Column of fructi- 

 fication inclosed. Stamineous corona 5-10-1 5-lobed : the lobes 

 disposed in a single or double series, ligulate, placed in front of 

 the stamens. Anthers simple at the top : pollen masses erect, 

 fixed by the base, with simple edges. Stigma mutic. Follicles 

 cylindrical, smooth. Seeds comose. Usually twining herbs 

 or subshrubs, only sometimes lactescent. Leaves opposite. 

 Roots fibrous or tuberous. The corona in this as in most of the 

 genera in the present order consists of a single w horl of 5 leaves 

 opposite the stamina, and alternating with the segments of the 

 corolla. In Ceropegia the leaflets of the corona are mostly 3- 

 lobed ; the lobes are sometimes distinct to near the base, form- 



