198 
ANNALS NEW YORK ACADEMY OF SCIENCES 
Leaf-blades canescent, silvery or silky-white beneath at 
least when young. 
Sepals pilose; leaf-blades silvery-canescent beneath. 
Sepals glabrous or nearly so; leaf-blades silky-pubes¬ 
cent, glabrate above with age. 
Leaf-blades hispid-pubescent to glabrate. 
Tips of sepals caudate-spatulate, obtuse; corolla white. 
Tips of sepals caudate-acuminate; corolla blue. 
Foliage pubescent or hirsute. 
Sepals glabrous; 25-30 mm. long; leaf-blades 
hastately 5-7 lobed and cordate-hastate. 
Sepals pubescent or hispid. 
Leaf-blades entire, silky-pubescent. 
Leaf-blades 3-5-lobed or angled; hispid-pubes¬ 
cent. 
Tips of sepals linear-attenuate, hirsute or 
hispid at the base. 
Bases of the sepals conspicuously broad¬ 
ened; lobes of the leaf-blades con¬ 
tracted below; corolla 2.5-3 cm. long. 
Sepals densely hirsute; tips strongly 
spreading. 
Sepals sparingly barbate with whit¬ 
ish hairs, tips not strongly spread¬ 
ing. 
Bases of the sepals not conspicuously 
broadened, linear-lanceolate; lobes of 
the leaf-blades rarely contracted be¬ 
low; corolla 3-6 cm. long. 
Tips of sepals merely long-acuminate, erect, 
slightly pubescent. 
Bracts 4-8 mm. long; sepals puberulent 
or sparingly pubescent. 
Bracts 12-20 mm. long; sepals appressed 
pubescent with silvery hairs. 
Foliage and stems nearly glabrous or finely ap- 
pressed-pubescent; sepals glabrous or nearly so, 
veined and merely acuminate, 16-20 mm. long. 
35. 7. mutabilis. 
36. 7. villosa. 
37. 7. ampullacea. 
38. 7. thurberi. 
39. 7. barbigera. 
40. 7. hederacea. 
41. 7. desertorum. 
42. 7. Nil. 
43. 7. vahliana. 
44. 7. Learii. 
45. 7. cathartica. 
31. Ipomcea decasperma Hallier f. Bull. Herb. Boiss. 5: pi. 14- 386. 
1897. 
Trailing from a large woody root; finely pubescent; leaf-blades orbicular-reni- 
form, cordate-hastate, 2-4 cm. broad or sometimes 3- to 5-lobed; peduncles 1- to 
3-flowered; sepals ovate, acuminate, 10-12 mm. long, hirsute; corolla purple, 5-6 
cm. long; capsules globose, 10 mm. in diameter, 5-celled, 5- to 10-seeded, 5-valved. 
Type locality : Valley of Mexico. 
Distribution : Rocky hillsides, central Mexico. 
Specimens examined: Near Durnago, Palmer 591 &592 , 1896 (N,Y,G). 
