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BOTANY. 



149 



corolla (2^ unciali) tubulosa^ "brevi-S-loba ; capsula globosa glabra. Hills and>ocliy places near 

 Puerto de Paysano, ^vGstern Texas, September; Bigdoio, (No- 1617; Wright^ is a variety 

 with the segments of the leaves broader.) Stem several feet long, twining around other plants. 

 Segments of the leaves 1-2 inches long, usually not more than half a line wide. Peduncle 

 with 2 subulate bracteoles at the summit^ thick and mostly recurved ; the pedicel about the 

 length of the peduncle. Tube of the corolla trumpet- shaped, more than two inches long ; the 



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limb rose color. 



IpoMCEAHETERorHYLLA, Orteg. Pharbitis heterophylla, CJiozs. in DC. Prodr. 9, p. 344. Rocky 

 hills and prairies along the Rio Grande ; also on the Rio Limpio and Devil's river. (Nos. 508, 

 509, a very hairy form, and 1613, Wright.) Sepals an inch long. Corolla more than three 

 inches long, pale rose color. 



Ipom(ea Nil, Roth. Pharbitis Nil, Chois. I. c. Western Texas ; Wright^ Nos. 103T and 1612. 



Magdalena, Sonora, October ; Thurber. 



Ipomcea longifolia, Benth. PI. Hartio. p. 16 cfc 345, I. Shumardiana, Torr, in Bot. Marafs 

 Bejp. jp. 291. Santa Cruz valley, Sonora, July; Thurber. "The prostrate branches are 6-10 

 feet long, forming large patches which are very conspicuous in the prairies. Flowers opening 

 in the morning, w^hite with a purple throat,'' {Thurher^) limb nearly three inches in diameter. 

 This differs from Captain Marcy's plant in the larger flowers, but not in other respects. After 

 comparison with an original specimen of I. longifolia^ I think it must be united with that 



I species 



Ipomcea Pes-Capb^, Stveet; Choisy^ I. c. p. 849. I. orbicularis, EIL Sk. 1, p. 257. Sandy 

 shores, Brazos Santiago, Texas, May ; Schoit. 



Ipomgea co:vdiutata, Poem, d Sch. Syst. 4, p. 228. I. trichocarpa. Ell. Bk. l^p. 258? In 

 cultivated grounds. Rancho San Christobel, lower Rio Grande, May ; Schoit, Our specimens 

 agree with Berlandier's No. 1931, quoted by Choisy. The species seems to be perennial. 



The capsule is smooth. 



Ipom(EA sinuata, Orteg. ; Choisy^ I. c. p. 362. I. dissecta, Pursh^ non TVillcL Convolvulus 

 dissectus, Linn.; Michx. FL l,p. 139. In shady places along the Rio Grrande, from the Pre- 

 sidio down to Eagle Pass ; August^ — November. A widely spread species. We have it from 

 Monterey, Mexico, collected by Dr. Edwards and Dr. Gregg. It occurs also in the West Indies 

 and as far south as Brazil. 



Ipomoea lagunosa, Linn. ; Choisy y I. c, p. 378. Alluvions of the Rio Grande, September, 



October. 



Ipom(EA costellata (n. sp.) : herbacea, glabrluscula, ramosa; foliis petiolatis pedatim 7-9- 

 partitisj segmentis linearibus vel spathulato-linearibus integris ciliolatis ; pedunculis 1-3- 

 floris petiolum paullo superantibus ; sepalis oblongis acutis exterioribus medio subcarinatis vel 

 ruguloso-muricatis ; corolla (semi poUicari) tubulosa brevilobata ; capsula glabra. On the Rio 

 Grande, from the mouth of Pecos to El Paso, and near the Copper Mines of New Mexico ; July— 

 October. (Nos. 505 and 1615, Wright.) Annual. Stems, 1-5 feet long, prostrate or climbing, 

 slender. Leaves 1-1| inch long, divided nearly to the base into 7-9 mostly very narrow lobes ; 

 petiole about as long as the limb. Pedicels thickened. Calyx glabrous, the exterior sepals 

 more or less conspicuously carinate or even winged ; the keel rugose-undulate, or sometimes 

 muricul tte. Corolla scarcely half an inch long, pink, the border with 5 short lobes. Style 

 undivided ; stigma capitate, two-lobed, and granulate. Capsule sub-globose, two-celled, the 

 cells two-seeded. Seed hairy. This species is allied to I. Coptica. 





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