20 



Clavis Analytica of the Convokulaccas 



[Jan. 



Stems creeping, and throwing out roots 

 — b« (§ Erpipomoea.) 



prostrate, not creeping—/. (§< Or- 



thipomoea) leaves aurieled at base : 

 plants glabrous. 



^ S Leaves sagittate lanceolate, acute. 32 I. reptans. 



I obtuse or emarginate — c. 



c Glabrous ; sepals wrinkled : flowers pretty 

 \ large — d. 



J more or less hirsute : sepals not wrinkled : 

 , ' flowers small— c. 

 ^ fc-Leaves emarginate or 2 lobed 33 I. pescaprse. 



I cordate reniform obtuse 34 I. rugosa. 



r Leaves reniform obtuse, sinuately toothed : 



^ sepals ovate rounded, ciliately torn 35 I. reniformis. 



J cordate, reniform obtuse or emargi- 



' nate, entire: sepals linear lanceolate, hairy 36 I. venicifolia. 

 j. S Leaves usually truncate or 3 toothed 37 I. tridentata. 



1 linear or linear lanceolate 38 L filicaules, 



< Capsules and sepals large and showy — h. 



^ t moderate size or small — m. 



^ { Leaves cordate, entire or sinuate — L 

 i divided — k. 



r S tern angled or winged: sepals unequal, 



1 < densely pubescent 39 I. turpethum. 



t terete : sepals equal, glabrous 40 I. campanulata Ch„ 



^ < Leaves palmately 7 partiti — I. 



t cordate, palmately 5 cleftor 5 angled 41 I. vitifolia. 



2 5 Lobes of leaves quite entire 42 I. tuberosa. 



2 — sinuately toothed or pinnatifid. 43 I. dissecta. 

 ^ Flowers capitate or aggregated — n. 



m 1 not capitate {in I. Wightii approxi- 



* mated) — p. 



/Leaves palmate or lobed, peduncles as long 

 n < as the leaf 44 I. pestigrides. 



' — — cordate acuminated — o. 



^Peduncles a little shorter than the petiole : 

 o < flowers inclosed in a perfoliate involuere 45 I. pileata. 



C _ very short : flowers not involuered. 46 I. cessiliflora, Roth. 



r Leaves cordate entirely or slightly lobed — q. 

 P I digitate or pedate — y. 



c Leaves entire — r. 

 ^ i toothed, lobed — w t 



