212 CONVOLVULACEiE. 



Ipomcea. 



rubescens, Choisy, I.e., is merely a longer-flowered form, from Kentucky; and Convolvulus 

 ciliolatus, Michx. 1. c, from Knoxville, Tennessee, is probably the same. — Dry ground 

 Upper Canada to Florida and Texas. There is a double-flowered state. 



++ ++ Perennial with a thick root: leaves all sagittate: peduncle mostly 1-flowered: sepals as of 

 the preceding but barely half inch long : corolla proportionally very large. 



I. sagittata, Cav. Glabrous : stems slender : leaves deeply sagittate, otherwise entire 

 acute or acuminate ; some with linear-lanceolate lobes ; some (at least the earlier) larger 

 and broader, with ovate-lanceolate outline and oblong obtuse basal lobes : corolla pink- 

 purple, 2 or 3 inches long; the tube with the narrowish throat very much exceeding the 

 calyx : seeds somewhat villous on the back or sides. — Ic. ii. 4, t. 107 ; Desf. Fl. Atl. i. 177. 

 /. sagiuifolia, Ker, Bot. Reg. t. 437 ; Chapm. Fl. 344. Convolvulus Carolinensis, Sea., Catesb. 

 Car. i. 35, t. 35. C. speciosus, "Walt. Car. 93. C. sagittifolius, Michx. Fl. i. 138. — Salt 

 marshes on the coast, N. Carolina to Texas. (Cuba, Spain and Barbary.) 



++++++ Perennials with roots not very large and thick, or annuals : corolla an inch and a half 

 long or smaller. 



= Calyx almost an inch long, large for the size of the corolla. 



I. sinuata, Ortega. Boot perennial : stem (rather woody at base) and petioles hirsute 

 with long spreading hairs from a papilliform base : leaves nearly or quite glabrous, 7-parted ; 

 the divisions lanceolate or narrowly oblong, sinuately and Iaciniately pinnatifid or incised : 

 calyx equalling the throat of the open-funnelform corolla (white with purple eye) : seeds 

 glabrous. — Dec. vii. 84 ; Choisy, 1. c. ; Chapm. 1. c. /. dissecta, Pursh, not "Willd. Convol- 

 vulus dissectus, L. Mant. 204; Jacq. Obs. iv. t. 28, & Vind. ii. 1. 159. — Near the coast in 

 Georgia to Texas. (Trop. Amer.) 



= = Calyx in fruit over half inch long, setose-hispid. 



I. barbatisepala. Apparently annual, glabrous except the calyx : leaves pedately 5-7- 

 parted ; the divisions lanceolate with narrowed base, an inch or two long, or the lateral 

 ones mostly short, entire : peduncles 1-2-flowered, not longer than the petiole : sepals 

 attenuate-linear from a broader base, nearly equal, in fruit 7 or 8 lines long, a third longer 

 than the 2-celled 4-seeded globular capsule, the back strongly hispid with long and stout 

 spreading bristles : corolla purple, less than an inch long : stigmas 2, globose : seeds gla- 

 brous or minutely scurfy. — W. borders of Texas ; declivity of mountain near EI Paso, 

 Wright (1849, no. 507). Calyx nearly as of I. hedemcea, Jacq., but withstiffer beard. 

 = ==== Calyx 5 to 9 lines long, completely glabrous : root perennial. 



I. Thurberi. Glabrous throughout, apparently with only low twining stems from a thick- 

 ened root or tuber : leaves palmately or pedately and deeply 5-7-clef t (an inch or more in 

 diameter) ; the widely divergent lobes triangular-lanceolate, or the one or three middle 

 ones somewhat caudately prolonged, the narrow tip obtuse : peduncle short, 1-flowered, 

 clavate in age : corolla, &c, not seen : sepals in fruit 8 or 9 lines long, lanceolate-attenuate 

 from a broader base, nearly twice the length of the 4-celled 4-valved globular coriaceous 

 capsule : seeds clothed with fine brownish somewhat furf uraeeous pubescence. — South- 



. eastern border of Arizona, near Santa Cruz, Thurber (no. 966), Wright. 



I. triflda, Don. Much resembles 2". commutata ; but the root perennial, the pubescence 

 shorter and softer, peduncles longer, and calyx glabrous. — Convolvulus trifidus, HBK. Nov. 

 Gen. & Spec. iii. 107. (Trop. Amer.) 



Var. Torreyana. Nearly glabrous throughout, freely twining : leaves cordate, about 

 2 inches long ; some entire or merely angulate : most 3-cleft, with ovate lobes, .the lateral 

 externally rounded : peduncles surpassing the leaves, umbellately 3-10-flowered : pedicels 

 in age muriculate-scabrous : sepals oblong-ovate or ovate-lanceolate, mucronate-acuminate, 

 chartaceous, 5 lines long, not at all ciliate : corolla f unnelform, pink or lilac-purple, over 

 an inch long : capsule globular, chartaceous, simply 2-celled, either glabrous or sparingly 

 pilose at tip, about equalling the calyx: seeds glabrous and very smooth. — /. commutata, 

 Torr. Bot. Mex. Bound. 149, not Roam. & Sch. /. fastigiata ? Torr. 1. c, not Sweet. — W. 

 and S. Texas, Wright, Bigelow, Lindheimer, Schott. 



Var. Berlandieri. Perhaps only a depauperate form : leaves smaller and deeper 

 cleft, some almost 3-parted ; the middle lobe lanceolate or ovate-lanceolate and longer, 

 giving a somewhat hastate outline ; the lateral divisions often 2-lobed or 2-3-cIeft and 

 their lobes acute: peduncles only an inch long. — Bejar, Texas, Berlandier. Referred by 

 Choisy to I. commutata. 



