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ANNALS NEW YORK ACADEMY OF SCIENCES 
145. Ipomcea purpusi sp. nov. 
Stems stout, perennial below, 1-several m. long, densely pilose; leaf-blades 
broadly ovate, 5-8 cm. long, cordate, deeply 3-lobed, acuminate, densely appressed- 
hirsute and green above, paler and densely pubescent beneath with less appressed 
hairs; petioles shorter than the blades; peduncles longer than the petioles, 4-10 cm. 
long, lanate above, 1- to 5-flowered; sepals oblong-lanceolate, acute and apiculate, 
inner ones 8-10 mm. long, glabrous but ciliate near the apex, outer ones shorter, 
pubescent and ciliate; corolla broadly campanulate-funnelform, about 3 cm. long 
and the limb as broad. 
Mexico: Zucuapan, Purpus 2213, 1906 (type — Y, N). 
146. Ipomcea collina House, Bot. Gaz. 43: 412. fig. 2. 1907. 
Petioles as long as the blades or shorter; peduncles stout, 1- to 5-flowered, 13-25 
cm. long; sepals 8-14 mm. long, lanceolate, outer ones sparingly pubescent, inner 
cuspidate-acute, glabrous; corolla purple, 5-7 cm. long. 
Type locality: Near Saltillo, Coahuila, Mexico. 
Distribution: Known only from the type locality. 
Specimens examined: Palmer 396, 1904 (type — N, Y). 
147. Ipomcea gracilis R. Br. Prodr. 484. 1810. House, Torreya 7: 
37, 38. 1907. 
Convolvulus denticulatus Desr. in Lam. Encyc. 3: 540. 1789. 
Convolvulus gracilis Spreng. Syst. 1: 604. 1825. 
Ipomcea denticulata Choisy in Mem. Soc. Phys. Genev. 6: 467. 1833.— G. Don, 
Gen. Syst. 4: 276. 1838.— Choisy in DC. Prodr. 9: 379. 1845. 
Not I. denticulata R. Br. 1810. 
Ipomcea littoralis Blume, Bijdr. 713. 1826.— G. Don, 1. c. 265. 
Ipomcea cymosa, Baker, FI. Maurit. 208. 1877. 
Ipomcea nicobarica Kurz, Jour. As. Soc. Beng. 45: 141. 1876. 
Ipomcea choisiana W. F. Wight, Contr. U. S. Nat. Herb. 9: 298. 1905. 
Ipomcea roseana House, Muhlembergia 3: 43. 1907. 
Perennial, glabrous, stems dark; leaf-blades ovate, cordate or cordate-hastate, 
obtuse or acute, mucronulate, 3-8 cm. long; peduncles 1- to 5-flowered, rarely many- 
flowered; sepals ovate, inner slightly longer, broad and rounded but minutely cuspi¬ 
date at apex, outer ones narrower, lanceolate-oblong, acuminate-cuspidate, 6-8 mm. 
long; corolla purplish-pink, 4-5 cm. long. 
Type locality: Cette espece a 6t6 trouvee par Commerson dans les 
Isles Mahe, Sechelles & des trois Freres. (Desr.) 
Distribution : Circumtropical. 
Specimens examined: Mexico: Colima, Palmer 978, 1890 (N); Costa 
