HOUSE, THE GENUS IPOMCEA 203 



Convolvulus hedercefolius Salisb. Prodr. 123. 1796. 



Ipomeea scabra Forsk. Fl. Aegypt.-Arab. 44. 1775. 



Ipomoea barbata Roth. Catal. 1: 37. 1797. 



Iponioea nil Pers. Syn. 1: 184. 1805.— Pursh, Fl. Am. Sept. 1: 146. 1814. Not 



I. nil Roth, 1797. 

 Ipomoea avicularis Raf. Fl. Ludov. 47. 1817. 

 Ipomoea scabrida Roem. & Schult. Syst. 4: 223. 1819, 

 Ipomoea phymatodes Spreng. Nov. Prov. 24. 1819. 

 Ipomoea ccerulea Koen. in Roxb. Fl. Ind. 2: 91. 1824. 

 Cleiem£ra hederacea Raf. Fl. Tellur. 4: 77. 1838. 

 Pharbitis hederacea Choisy in M^m. Soc. Phys. Genev. 6: 440. 1833. — In DC. 



Prodr. 9: 344. 1845.— SmaU, 1. c. 964. 

 Pharbttis 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. p/. 188. 

 Plukn. Phytogr. 1. c. Bot. Reg. ph. 85 & 276. Britton & Brown, Illus. 

 Fl. 3: /. 2950. Jacq. Ic. Ear. 1: pi. 36. Knorr. Thes. Hort. pi. 190. 



, 41. Ipomoea deserfcorum 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, SchoU, 1851 (C). Canon de los Guerryos, 

 C. E. Lloyd (Lumholtz Exped.) 432, 1894 (G). Chihuahua: South- 

 western part. Palmer 105, 1885 (N, G). 



; 42. Ipomoea 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 cceruleus major, folio hederacea, Dill. Hort. Elth. 97. 

 C. annuus, folio cordatis rarius trilobis, calycibus tuberculato pilosis, L. Hort. Cliff. 

 67. 



