Ipomcea. COXVOLVULACEJE. 213 



== = = = Calyx 3 to 6 lines long, thiunish, pilose or at least ciliate with some long and soft 

 hairs rising from a more rigid or papilliform base, more or less longer than the small and thin- 

 walled globular 2-cclled capsule, which is sparsely pilose but sometimes glabrate at the upper 

 part : seeds glabrous : stems freely twining : root annual. 



I. commutata, Roem. & Soh. Hirsute-pubescent or glabrate : leaves (2 or 3 inches 

 long), cordate, some entire, some strongly 3-lobed with middle lobe ovate-lauceolate and 

 acuminate ; the lateral usually shorter and broader, sometimes again 2-lobed : peduncles 

 slender, 1£ to 3 inches long, 1-3-flowered : sepals oblong, acuminate, 5 lines long : corolla 

 an inch or more long, purple or pink. — Syst. iv. 228 ; Choisy, 1. c. Convolvulus Carolinus, 

 L. Spec. i. 154 (Dill. Elth. 100, t. 84, fig. 98) ; Michx. Fl. i. 139. Ipomcea Carolina, Pursh, 

 Fl. i. 145, not L., which is W. Indian. /. Irichocarpa, Ell. Sk. i. 258, which slightly antedates 

 the name commutata, but is misleading, the fruit being not rarely glabrate or glabrous. — 

 Dry or low grounds, S. Carolina to Texas. 



I. lacunosa, L. Slightly pubescent or hirsute, or nearly glabrous : leaves as the pre- 

 ceding or less lobed, more commonly ovate-cordate and entire, conspicuously acuminate : 

 peduncles shorter : sepals commonly broader and mostly naked, except the long-ciliate 

 margins : corolla half inch or so in length, narrow-funnelform, white or with a purple 

 acutely 5-angulate border : globose capsule more turgid and pilose. — Spec. i. 161 (Dill. 1. c. 

 t. 87, fig. 102) ; Michx. 1. c. ; Ell. 1. c. Convolvulus micranthus, Riddell, Syn. Fl. W. States, 

 70. — River banks and low grounds, Penn. to Illinois, S. Carolina, and Texas. 



I. triloba, L. Stems slender, sparsely pubescent : leaves usually glabrous, very deeply 

 3-lobed or almost 3-parted ; the divisions mostly entire ; the middle ovate or lanceolate- 

 ovate with narrowed base ; the lateral semicordate : peduncles usually elongated : sepals 

 3 lines long, oblong-ovate : corolla narrow, two-thirds inch long, resembling that of the 

 preceding, but purple. — Choisy, 1. c. 383 ; Chapm. Fl. 343. — Key West, Florida ; perhaps 

 introduced. (Trop. Amer.) 



= = = = = Calyx only 2 lines long, naked and glabrous, shorter than the glabrous simply 

 2-celled thin-walled capsule : herbage glabrous throughout : root not seen. 



I. W right]!. Stems very slender : leaves all digitately divided into 5 narrowly lanceolate 

 entire leaflets (all 12 to 18 lines long, or the lateral shorter, obtuse or acutish and mucro- 

 nulate) : peduncles slender, 1-flowered, not exceeding the petiole : sepals ovate, very obtuse, 

 equal : corolla pink or purple, narrowly f unnelform, half inch long : capsule ovoid, 4 lines 

 long : seeds globular, minutely and densely puberulent. — Texas, Wright, probably from 

 the southern part of the State. Habit of /. quinquefolia, but leaves, corolla, &c, different. 

 A plant resembling it was collected by Dr. Palmer on the Yaqui River, in the north- 

 western part of Mexico, in which the leaves seem to be pedate, and the long filiform 

 peduncles coil in the manner of tendrils. 



I. cardioph^lla. Very glabrous : leaves broadly cordate and with basal lobes somewhat 

 incurved, entire, acuminate, an inch or two long : peduncles mostly 1-flowered and shorter 

 than the slender petiole : sepals ovate, acute, thickish but scarious-margiued, more or less 

 muriculate-glandular on the back : corolla purple, three-fourths inch long, campanulate- 

 funnelform above the narrow tube, which barely equals the calyx : capsule ovoid, half 

 inch long ; the thin valves finely lineolate : seeds oval, brownish-puberulent. — Western 

 borders of Texas, in the mountains near El Paso, Wright. In calyx and foliage considerably 

 resembling I. violacea. 



-! — H — -i — Stems erect or diffuse, feebly if at all twining, never creeping or even prostrate : leaves 

 or their divisions all linear or narrower and entire. 



■w- Leaves simple and entire: flowers large: root perennial, immense, weighing from 10 to 100 

 pounds. 



I. leptophylla, Torr. Very glabrous : stems erect or ascending (2 to 4 feet high), 'and 

 with recurving slender branches : leaves linear (2 to 4 inches long, 2 or 3 lines wide), short- 

 petioled, acute : peduncles short, 1-2-flowered : calyx 3 or 4 lines long ; the sepals broadly 

 ovate, very obtuse, outer ones shorter : corolla pink-purple, funnelform, about 3 inches 

 long : capsule ovate, an inch long : seeds rusty-pubescent. — Frem. Rep. 95, & Emory Rep. 

 148, t. 11. Convolvulus Caddoensis, Buckley in Proc. Acad. Philad. 1862. — Plains of Ne- 

 braska and Wyoming to Texas and New Mexico : a striking and showy species, first col- 

 lected, in Long's Expedition, by Dr. E. James, who singularly mistook it for an annual. 

 Torr. in Ann. Lye. N. Y. ii. 223. (Convolvulus.) 



