Cynanchum.'] lxxxv. asclepiade.-e (brown). 301 



ing difference also occurs in Asclepias, so tliat it appears to be a cljaracter of 

 spt-eific importance only. 



Plant with stems and brandies several inches or feet in 

 length, twinino or straight. 

 Stems with well de-^eloped leaves. 



Leaves linear ]6. C. defuliasrenft. 



Leaves obtusely hastate at the base. 



Coroua 2 lin. long ; style shorter than the 



corona 10. C hastifullum. 



Corona 1 lin. long; style longer than the corona 11. C. clavid,',i.s. 

 Leaves cordate, subtruncate or rounded at the 

 base 

 Stems twining, slender, ^-1^ lin. tliiclc. 

 Corolla-lobes 2-4 lin. long. 



Corona with 5 subulate teeth within the 



tube in front of its 5 longer teeth . I. C. abyssininnn. 

 Corona with 5 slightly hooded lobes within 

 the tube, folded in the bases of tlie 



longer teeth 2. C. nwssnnihicense. 



Corona with 5 long and 5 short teeth at the 

 top, without teeth or lobes within i;s 

 tube. 

 Petioles 1-2 in. long ; coronal-teeth 



erect or recurved . . . .3. C. polyanihum. 



Petioles 3-3^ in. long; coronal-teith 



strongly inarched . . . . 4. C lonjipes. 



Corolla-lobes §-2 lin. long. 



Anther-appendages long and narrow, con- 

 nivent-erect over the conical or terete 

 apical part of the style. 

 Peduncles f-l^ in. long . . . 5. C ATannii. 



Peduncles 0— j in. long. 



Corona tubular, distinctly 10-toothed 



at the apex . . . . 6. C. Adali„te. 

 Corona tubular, 5-lobed or toothed at 



the apex 9. C. alfiscar.denf. 



Anther-appendages suborbicular or sub- 

 quadrate, inflexed over the truncate or 

 dome-shaped apex of the style. 

 Corolla-lobes 1 lin. long; corona 1^ lin. 



long . , . . • .7. C.frafernuw. 



Corolla-lobes f-g lin. long; corona 



i-§ lin. long . . . . 8. r. sc/nstofjlossuw. 



Stems not twining, 2-3 lin. thick in the lowi r 

 part;. 

 Corona tubular, 10-toothed, with the alternate 



teeth entire or bifid . . . -12. C. validum. 



Corona of 5 cuneate trifid lobes . . .13. C. soimtliense. 



Stems fleshy, leafless, or with very minute rudinien- 



tarv leaves \o. C. sarcostemma- 



^ ' toides. 



Plant 1-2 in. high, erect, leafless at the time of flow, r- 



jnr 14. C. prnros. 



