HOUSE, THE GENUS 1P0MCEA 
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1. Argyrophyllse. Plants silvery-pubescent and more or less tomentose; 
sepals acuminate, lanceolate; corolla white. ( Ipomoea § Argyrophyllce 
Baker & Rendle, in T. Dyer, FI. Trop. Afr. 4 2 : 135. 1905.) 
One species in North America. 1. 7. ciervensis. 
1. Ipomosa ciervensis Painter; House, Bot. Gaz. 43:408. 1907. 
Shrubby below, 30-60 cm. high, densely silvery-pubescent throughout except 
the corolla; leaf-blades sessile or nearly so, oblong-lanceolate, acute or obtuse and 
somewhat 3-lobed, 4-6 cm. long; peduncles 1 cm. long; bracts linear-spatulate or 
subfoliaceous; sepals ovate-lanceolate, attenuate, about 15 mm. long; corolla 
white, about 6 cm. long, pubescent without in bud and strigulose on the plicse when 
expanded. 
Type locality: Placienda Ciervo, Queretaro, Mexico. 
Distribution: Known only from the type locality. 
Specimens examined: Rose, Painter & Rose 9660, 1905 (type — N, Y). 
Altamirano 1557, 1905 (N). 
2. Leptophyilse. Foliage pubescent or glabrous, not silvery; leaf- 
blades entire (divided in I. Pringlei & I. ancisa ); sepals coriaceous, ovate 
to ovate-laceolate, obtuse; corolla large, purple or white. ( Ipomoea § 
sufjruticosoe Choisy, in DC. Prodr. 9: 353. 1845.) 
Corolla white or cream-colored. 
Sericeous-pubescent; outer sepals much shorter than the 
inner. 
Glabrous or nearly so. 
Leaf-blades linear-lanceolate to oblong-lanceolate; sepals 
subequal. 
Leaf-blades pinnately divided, 5-10 cm. long, sepals very 
unequal. * 
Corolla purple, lilac or pink. 
Plant pubescent or hirsute. 
Leaf-blades subsessile, hastately toothed at the base. 
Sparingly pubescent; sepals 10-15 mm. long. 
Densely pubescent; sepals suborbicular, 8-10 mm. 
long. 
Leaf-blades not toothed at the base. 
Leaves 2 cm. long or more; sepals acute, 8-13 mm. 
long. 
Leaves less than 1 cm. long, woolly-white; sepals obtuse, 
5-6 mm. long. 
Plant glabrous or nearly so. 
Leaf-blades pinnately divided, 2-4 cm. long. 
Leaf-blades entire, linear-lanceolate. 
2. I. petrophila. 
3. I. longifolia. 
8. I. ancisa. 
4. 7. stans. 
5. 7. jaliscana. 
6. 7. durangensis. 
9. 7. Unis. 
7. 7. pringlei. 
10. 7. leptophylla. 
