158 



ASCLEPIADE^E. LXVIII. EUSTEGIA. LXIX. METASTELMA. LXX. MICROLOMA. LXXI. ASTEPHANUS. 



LXVIII. EUSTE'GIA (from tv, eu, well, and trrtyw, stego, 

 to cover ; in reference to the triple corona). R. Br. in mem. 

 wern. soc. 1. p. 51. Apocynum species of Thunb. 



LIN. SYST. Pentdndria, Digynia. Corolla rotate. Co- 

 rona triple, each composed of 5 leaves ; outer one inserted in 

 the throat of the corolla, having its leaflets opposite the seg- 

 ments of the limb ; the leaflets of the rest alternating with those 

 of the outer, but opposite the anthers ; leaflets of the middle 

 corona tripartite, of the inner one undivided. Anthers termi- 

 nated by a membrane ; pollen masses fixed by their tapering 

 apexes, pendulous. Stigma submutic. Follicles unknown. 

 Dwarf decumbent herbs. Leaves opposite, hastate. Flowers 

 subumbellate. Umbels interpetiolar. 



1 E. HASTA'TA (Roem. et Schultes, syst. 6. p. 119.) branches 

 decumbent ; leaves hastate, ciliated. If. . G. Native of the 

 Cape of Good Hope. Spreng. neue. entd. p- 268. t. 5. f. 5-10. 

 Apocynum hastatum, Thunb. prod. 1. p. 47. fl. cap. 2. p. 164. 

 act. nov. petrop. 14. p. 514. t. 9. f. 6. A. minutum, Lin. suppl. 

 p. 169. Branches and peduncles downy. Leaves glabrous. 



Hastate-\e&\ed Eustegia. Fl. June, July. Clt. 1816. PI. 

 dec. 



2 E. FILIFORMIS (Rcem. et Schultes, syst. 6. p. 120.) stems 

 decumbent; leaves linear-filiform. If. . G. Native of the Cape 

 of Good Hope, in sandy fields at Swartland. Apocynum fili- 

 forme, Thunb. prod. 1. p. 47. fl. cap. 2. p. 160. Stems, pe- 

 duncles, and pedicels downy. Leaves glabrous. 



/V7j/brm-leaved Eustegia. PI. dec. 



Cult. For culture and propagation see Ceropegia, p. 112. 



4. Stamineous tube or gynostegium naked. Corona wanting. 



LXIX. METASTE'LMA (from ^tra, meta, instead, and 

 <TTE\fj.a, stelma, a crown ; the throat is crowned by 5 exserted 

 teeth instead of a corona). R. Br. in mem. wern. soc. 1. p. 52. 

 Cynanchum species of authors. 



LIN. SYST. Pentdndria, Digynia. Corolla subcampanulate ; 

 throat crowned by 5 exserted teeth, which are opposite the 

 recesses between the segments, and running down the tube 

 inside. Stamineous corona wanting. Anthers terminated by a 

 membrane ; pollen masses compressed, fixed by their attenuated 

 apexe. , pendulous. Stigma mutic. Follicles unknown. A per- 

 ennial, twining, glabrous plant. Leaves opposite, membranous. 

 Umbels interpetiolar, almost sessile. Flowers small. 



1 M. PARVIFLORUM (R. Br. 1. c.). TJ. . ? ^. S. Native of 

 the West Indies, among bushes on the mountains. Cynanchum 

 parviflorum, Swartz, prod. p. 53. fl. ind. occ. 1. p. 537. Plum, 

 icon. 215. f. 1. Leaves ovate, subulate at top. Stems bluntly 

 tetragonal. Flowers small, whitish green. 



Small-lowered Metastelma. PI. tw. 



Cult. For culture and propagation see Pergularia, p. 133. 



LXX. MICROLO'MA (from micpos, micros, small, and 

 Xw/ia, loma, a fringe ; in reference to the fascicles of hairs in 

 the tube of the corolla). R. Br. in mem. wern. soc. 1. p. 53. 

 Ceropegia species, Lin. and Thunb. Lam. ill. t. 179. 



LIN. SYST. Pentdndria, Digynia. Corolla urceolate, with a 

 ventricose angular tube, a naked throat, and a short limb. 

 Scales 5, inclosed, inserted in the middle of the tube under the 

 recesses, alternating with as many fascicles of hairs. Sta- 

 mineous corona none. Anthers sagittate, terminated by a mem- 

 brane ; pollen masses compressed, fixed by their apexes, pendu- 

 lous. Stigma apiculated. Follicles unknown. Twining sub- 

 shrubs. Leaves opposite. Umbels interpetiolar. 



1 M. SAGITTA'TUM (R. Br. 1. c.) leaves sagittate, downy; 

 limb of corolla acutish. fj . r ^. G. Native of the Cape of 

 Good Hope, on sandy hills. Ceropegia sagittata, Lin. mant. 

 215. Thunb. prod. 1. p. 37. fl. cap. 2. p. 148. nov. act. 



petrop. t. 14. Jacq. hort. schcenbr. 1. p. 17. t. 38. -Burm. 

 afr. 36. t. 15. Stems villous or tomentose. Corolla scarlet, 

 ex Lin. ; purple, but green at the base and apex, ex Thunb. 



Sagittate-leaved Microloma. Fl. July, Aug. Clt. 1775. 

 Shrub tw. 



2 M. LINEA'RE (R. Br. 1. c.) leaves linear, glabrous ; limb of 

 corolla very blunt. J? . / "\ G. Native of the Cape of Good 

 Hope, on hills. Ceropegia tenuiflora, Lin. syst. 21 1. Thunb. 

 prod. 1. p. 37. fl. cap. 2. p. 147. Periploca tenuiflora, Lin. 

 spec. p. 310. Ceropegia tenuifolia, Pers. ench. 1. p. 277. 

 Burm. afr. 37. t. 16. f. 1.? Plukn. mant. 17. t. 335. f. 5. 

 Stems glabrous. Corollas blood-coloured, ex Thunb. 



Zz'near-leaved Microloma. Fl. July, Aug. Clt. 1823. Sh. 

 twining. 



Cult. For culture and propagation see Ceropegia, p. 112. 



LXXI. ASTE'PHANUS (from a priv. and artQavoe, ste- 

 phanos, a corona; corona none). R. Br. in mem. wern. soc. 1. 

 p. 54. Apocynum species, Lin. fil. and Thunb. 



LIN. SYST. Pentdndria, Digynia. Corolla subcampanulate, 

 having the throat and tube without scales. Stamineous corona 

 wanting. Anthers terminated by a membrane ; pollen masses 

 pendulous. Stigma cordate or mutic. Follicles unknown. 

 Perennial, usually twining plants. Leaves opposite. Umbels 

 interpetiolar. Flowers small. This genus differs chiefly from 

 Microloma in the want of scales within the tube of the corolla. 



1 A. TRIFLORUS (R. Br. 1. c. Schultes, syst. 6. p. 122.) 

 stems twining, pilose ; leaves lanceolate, villous beneath ; um- 

 bels generally 3-flowered. \i . r ^. G. Native of the Cape of 

 Good Hope. Cynanchum triflorum, Lin. fil. suppl. 169. 

 Thunb. prod. 1. p. 47. fl. cap. 2. p. 161. Corollas white. 

 Filaments and anthers connate. 



Three-flowered Astephanus. Fl. July, Aug. Clt. 1816. 

 Shrub tw. 



2 A. LINEA V RIS (R. Br. 1. c. Schultes, syst. 6. p. 123.) stems 

 twining, glabrous ; leaves linear-lanceolate ; umbels trichoto- 

 mous, lateral, and terminal. Tj . r> . G. Native of the Cape of 

 Good Hope, in Swartland. Cynanchum lineare, Lin. fil. suppl. 

 169. Thunb. prod. 1. p. 47. fl. cap. 2. p. 160. Leaves an inch 

 long. Corollas white. 



Zinear-leaved Astephanus. Fl. July, Aug. Clt. 1816. 

 Shrub tw. 



3 A. LANCEOLA'TUS (R. Br. 1. c. Schultes, 1. c.) stems twin- 

 ing, glabrous ; leaves lanceolate, glabrous ; umbels usually 3- 

 flowered. J; . r ^. G. Native of the Cape of Good Hope. 

 Apocynum lanceolatum, Thunb. prod. 1. p. 47. fl. cap. 2. p. 

 162. Corollas white. Leaves rounded at the base. 



Zaneeotoe-leaved Astephanus. Shrub tw. 



4 A. ? CORDA'TUS (R. Br. 1. c. Schultes, 1. c.) stems twin- 

 ing, hairy ; leaves ovate, rounded at the base, villous beneath 

 and glabrous above ; umbels interpetiolar. ^ . . G. Native 

 of the Cape of Good Hope, in woods. Apocynum cordatum, 

 Thunb. prod. 1. p. 47. fl. cap. 2. p. 163. Leaves more than 

 an inch long. Calycine segments laciniated, acute. Corolla 

 greenish, 5-parted to the base ; segments ovate, concave, obtuse. 

 Filaments distinct; anthers combined; stigmas obtuse. Folli- 

 cles 2, oblong. Styles 2, filiform. 



Cordate-leaved Astephanus. Shrub tw. 



5 A. MASSONII (Schultes, syst. 6. p. 124. ex R. Br. 1. c.) 

 shrubby ; branches spinescent ; leaves small, opposite, distant, 

 cordate ; corolla more urceolate than campanulate, the orifice 

 of the tube furnished with deflexed hairs. h . G. Native of 

 the Cape of Good Hope, where it was detected by Masson. 

 The pollen masses are fixed by their attenuated apexes. The 

 follicles are nearly cylindrical, and smooth, with the seeds of the 

 usual structure. 



