HOUSE, THE GENUS IPOMCEA 257 



Type locality: Oak woods, Juquila, Mexico {Galeotti 1375). Not 

 known by any recent collections. 



165. Ipomcea curtissii sp. nov. 



Slender, twining, 1-2 m. long, finely and densely pubescent or canescent; leaf- 

 blades ovate, entire, cordate, acute, 2-5 cm. long and as broad, or broader, glabrous 

 or nearly so; petioles usually shorter; peduncles rarely longer than the petioles, 

 1- to 5-flowered; pedicels 15-20 mm. long and slightly thickened, recurved in fruit; 

 sepals subequal, greenish, puberulent, scarious-margined, ovate, acute, 5-6 mm. 

 long; corolla yellowish with a magenta base, funnelform, about 4 cm. long, the sub- 

 entire limb as broad; capsules ovoid, acute, about 12 mm. long, 2-celled; seeds 

 glabrous. 



Cuba: Havana, Curtiss 562, 1904 (type — Y, G). Panama; Santa Rita 

 Trail, Cowell 166, 1905 (Y). 



Apparently differing from /. obscura Ker. only by its larger sepals and 

 larger corolla of a more decided yellow. 



' 166. Ipomoea robinsonii sp. nov. 



A slender, glabrous, twining vine with zig-zag leafy branches; leaf-blades ellipti- 

 cal-oblong, rounded at base, apex obtuse or subacute, 6-8 cm. long, 2-4.5 cm. broad, 

 punctate; petioles 1-2 cm. long; peduncles 1-flowered, less than 2 cm. long, the 

 two large yellowish-green bracts elliptical-lanceolate and acute, tapering to the 

 base; sepals orbicular-ovate, rounded at apex, 7-9 mm. long; corolla slender funnel- 

 form, 6-8 cm. long, white, the limb 3.5-4 cm. broad, with 5 rounded lobes; stamens 

 nearly as long as the corolla; capsules ovoid, 1 cm. long, apiculate. 



Mexico: Morelos; Lava beds near Cuemavaca, Pringle 7338, 1896 

 (type — G). 



Named in honor of Dr. B. L. Robinson, curator of the Gray Herbarium 

 of Harvard University, 



'-^167. Ipomcea dimorphophylla Greenm. in Proc. Am. Acad. 33: 482. 



1898. 



Slender, perennial below, more or less pubescent with fine hairs; leaf-blades 

 ovate-oblong, 4-10 cm. long, 3-8 cm. broad, shallowly cordate, acuminate, entire or 

 variously 3-lobed, more or less pubescent beneath; peduncles shorter than the peti- 

 oles, 1-several flowered; sepals thick and coriaceous, obtuse, 6-7 mm, long; corolla 

 white, 6-8 cm. long. 



Type locality: Near Cuemavaca, Morelos, Mexico, 



Distribution: Morelos and Oaxaca, Mexico. 



Specimens examined: Cuemavaca, Pringle 6658, 1897 (type — G, N, 



