HOUSE, THE GENUS IPOMCEA 
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5. Ipomoea jaliscana House, Muhlenbergia 3: 39. 1907. 
Ipomoea stans var. hirsuta Robinson, Proc. Am. Acad. 29: 319. 1894. 
Differs from I. stans by its more conspicuously hirsute stems and leaves, the 
sessile leaf-blades which are relatively broader and more deeply lobed at the base; 
sepals suborbicular, 6-8 mm. long. 
Type locality: Rio Blanco, Jalisco. 
Distribution: Jalisco. 
Specimens examined: Palmer 324, 1886 (type—G, N, C). Pringle 
4488 , 1893 (G, N). 
6. Ipomoea durangensis sp. nov. 
Stems erect, 50 cm. tall, finely sericeous-pubescent, densely so above, silvery on 
young parts; leaf-blades elliptical-oblong, 2-3 cm. long, 5-15 mm. wide, obtuse; 
peduncles 1 cm. long or less, 1-flowered; sepals subequal, lanceolate, acute, 8-13 
mm. long, densely silky-pubescent; corolla slender funnelform, 6-7 cm. long, violet- 
purple with a white tube, plicse pubescent without, the limb 5-6 cm. broad; sepals 
enlarged in fruit with subspatulate tips (not accrescent); capsules globose-ovoid, 
subacute, 15 mm. high, thick-walled, 2-celled; seeds minutely pubescent with a 
short coma of hairs on the dorsal angles. 
Mexico; Durango, E. W. Nelson 4639 , 1898 (type, sheet No. 332692 
— N, dupl. G), 4664, 1898 (N — 332718 , G). Palmer 366, 1896 (N, Y, G). 
7. Ipomoea pringlei A. Gray, Proc. Am. Acad. 22 : 307. 1887. 
? Ipomoea sescossiana Baillon, in Bull. Soc. Linn. Par. 1: 385. 1883. 
Tall, erect and rigid; leaf-blades pinnately divided into 5-8 linear or filiform 
segments, 15-30 mm. long; peduncles stout, 1-flowered, as long as the leaves; sepals 
oblong, rounded, 7-8 mm. long; corolla blue or purple, 6-7 cm. long; capsules ovoid, 
12-14 mm. high on reflexed pedicels, 2-celled; seeds tomentulose with an incon¬ 
spicuous coma on the dorsal angles. 
Type locality : Chihuahua. 
Distribution: Hilly regions of northern Mexico. 
Specimens examined: Chihuahua, Pringle 782, 1886 (type—G, N, 
Y). 679, 1885 (G). E. W. Nelson 6276, 1899 (N). Durango, E. W. 
Nelson 4729, 1898 (N). 
8. Ipomoea ancisa sp. nov. 
Resembling I. Pringlei', leaf-blades 5-10 cm. long, the segments filiform, 2-5 
cm. long, .5-1.5 mm. wide; peduncles very stout, 6-11 cm. long, 1-flowered; sepals 
very unequal, orbicular-ovate, obtuse, with scarious margins; corolla slender- 
funnelform, white, 7-8 cm. long, the limb 6-7 cm. broad. 
