HOUSE, THE GENUS IPOMCEA 
203 
Convolvulus hedercefolius Salisb. Prodr. 123. 1796. 
Ipomoea scabra Forsk. FI. Aegypt.-Arab. 44. 1775. 
Ipomcea barbata Roth. Catal. 1: 37. 1797. 
Ipomoea nil Pers. Syn. 1: 184. 1805.— Pursh, FI. Am. Sept. 1: 146. 1814. Not 
I. nil Roth, 1797. 
Ipomoea avicularis Raf. FI. Ludov. 47. 1817. 
Ipomoea scabrida Roem. & Schult. Syst. 4 : 223. 1819. 
Ipomoea phymatodes Spreng. Nov. Prov. 24. 1819. 
Ipomoea ccerulea Koen. in Roxb. FI. Ind. 2: 91. 1824. 
Cleiemera hederacea Raf. FI. Tellur. 4 : 77. 1838. 
Pharbitis hederacea Choisy in Mem. Soc. Phys. Genev. 6: 440. 1833.— In DC. 
Prodr. 9: 344. 1845.—Small, 1. c. 964. 
Pharbitis variifolia Decne. Nouv. Ann. Mus. Par. 3 : 390. 1834. 
Pharbitis forskalii, barbata, purshii & scabrida G. Don, Gen. Syst. 4 : 263. 1838. 
Pharbitis coerulescens Sweet, Hort. Brit. ed. 3, 482. 1839. 
Type locality: Virginia, Carolina (Dill.). 
Distribution : Dry or sandy soil, fields and thickets, Virginia to Kansas, 
Texas, Florida and tropical America. Adventive northward to Connecticut, 
central New York, Ontario and Illinois. 
Illustrations: Dill. Hort. Elth. pi. 80. f. 92. Bot. Mag. pi. 188. 
Plukn. Phytogr. 1. c. Bot. Reg. pis. 85 & 276. Britton & Brown, Illus. 
FI. 3: /. 2950. Jacq. Ic. Rar. 1: pi. 36. Knorr. Thes. Hort. pi. 190. 
41. Ipomcea desertorum sp. nov. 
Closely related to the preceding; pale-green; stems scabrous and sparsely 
pilose with loosely reflexed hairs; leaf-blades 3-lobed, lobes rarely contracted below, 
usually triangular-lanceolate and acuminate, appressed-hirsute above, stiffly hirsute 
beneath and on the petioles; peduncles 1-few flowered; bracts filiform, 4-6 mm. 
long; sepals linear-lanceolate, 18-26 mm. long, tips scarcely spreading, margin ciliate 
and base not conspicuously broadened, sparingly barbate with stiff, whitish hairs 
arising from conspicuously white prominent papillise; corolla 3 cm. long, blue with 
a white tube; seeds finely rough-pubescent. 
Arizona: Tuscon, Thornber 29, 1903 (type — Y). New Mexico: 
Florida Mts., Mulford 1088, 1895 (Y). Sonora: Guaymas, Palmer 295, 
1887 (N, Y, G). St. Magdalena, Schott, 1851 (C). Canon de los Guerryos, 
C. E. Lloyd (Lumholtz Exped.) 4 32, 1894 (G). Chihuahua: South¬ 
western part, Palmer 105, 1885 (N, G). 
42. Ipomcea nil (L. in part) Roth, Catal. Bot. 1: 36. 1797.— Hallier 
f. in Jahrb. Hamb. Wissensch. Anst. 15 : 44. 1898; 16 : 42. 
1898.— Bull. Soc. Roy. Bot. Belg. 37: 94. 1898. 
Convolvulus coeruleus major, folio hederacea, Dill. Hort. Elth. 97. 
C. annuus, folio cordatis rarius trilobis, calycibus tuberculato pilosis, L. Hort. Cliff. 
67 . 
