210 COXVOLVULACE^E. Ipomcea. 



-t Root annual : flowers opening early in the morning, soon closing under sunshine. (All in- 

 cluded under Conculrulus he.de.ra.ceus, L., Hort. Cliff. & Spec. ed. 1.) 



I. hederacea, Jacq. Leaves deeply 3-lobed and deeply cordate; the lobes ovate or 

 ovate-lanceolate, and the middle one narrowed at base, lateral ones sometimes repand - 

 2-lobed : peduncles either short or very short, 1-3-flowered : pedicels none or hardly any : 

 sepals (two-thirds to near an inch long) linear-attenuate from a dilated and densely long 

 villous-hirsute base, in age the upper part recurved-spreading : corolla short-funnelform, 

 sky-blue with whitish tube, less than 2 inches long. Ic. Rar. t. 30 ; Bot. Reg. t. 85 ; Meissn. 

 I.e. 228; but not the Convolvulus hederaceus, L. Spec. ed. 2, 219, at least as to the cited 

 figures of Dill. Elth., but clearly C. Nil, L. 1. c., as to the lower figure cited (fig. 02), and 

 therefore of Amer. authors. /. barbata, Roth, Cat. i. 37. Pharbitis hederacea, Choisy, 1. c. 

 Waste and cult, grounds, Penn. to Florida and Louisiana, barely naturalized northward, 

 perhaps indigenous far southward. (Trop. Amer. and now widely dispersed.) 

 I. NIL, Roth, Cat. i. 16, and of most botanists who distinguish /. hederacea, ( Convolvulus Nil, 



L. 1. c., only as to fig. 91 in Dill. Elth., & Bot. Mag. t. 188, and doubtless C. hederaceus, L., as 



to Dill. Elth. t. 81, fig. 93), is an Old World species with larger and longer corolla (2 or 3 



inches long), attenuate and erect calyx-lobes an inch long, the peduncle and pedicels short 



but distinct, the leaves less lobed, &c. To this belongs Pharbitis triloba, Miq., and P. Nil, var. 



limbata, Hook. f. Bot. Mag. t. 5720, a cultivated plant. To it properly belongs the Oriental 



name 2V//. 



I. Mexicana. Slender : earlier leaves angulate-3-lobed or some entire ; the others as in 

 I. hederacea, or the middle lobe often broadest at base: peduncles slender (from half inch 

 to 3 inches long), commonly equalling or even surpassing the petiole : fruiting pedicels (1 to 

 3) as long as the calyx : sepals (only half inch long) lanceolate, rather sparsely hirsute or 

 hispid with comparatively short hairs, erect : corolla violet-purple, only an inch long, and 

 limb an inch or so in diameter. Convolvulus flore pur/mreo, &c., Dill. Elth. t. 83, fig. 9G, 

 therefore in part C. hederaceus, L. : it might have taken this specific name had not another 

 of the confused species been early taken up by Jacquin in Ipomoea. I. Nil, var. diversifolia, 

 Choisy in DC. Prodr. ix. 3~43, viz. Pharbitis diversifolia, Lindl. Bot. Reg. t. 1988. /. Nil, 

 Meissn. in Fl. Bras. 1. c. 228, in part, & t. 79, fig. 1. New Mexico and Arizona, Fendler, 

 Wright, Thurber, &c. (Mex., &c.) Nearer to the following than to the preceding. 



I. purpurea, Lam. (COMMON MORNING GLORY.) Leaves cordate, entire: peduncles 

 elongated (2 to 5 inches long), 1-5 flowered : umbellate pedicels fully twice the length of 

 the calyx, thickened and usually refracted in fruit : sepals lanceolate, half inch long, less 

 hirsute : corolla about 2 inches long, violet, purple, or pink, varying to white and diversely 

 variegated. Conrolrxlns purpureus, L. ; Sims, Bot. Mag. t. 113, 1005, 1682. Pharbitis his- 

 pida, Choisy, 1. c. Cult, grounds, an escape from cultivation in the Atlantic States. 

 Texas, Berlandier. San Diego Co., California (Cleveland), where it may be indigenous. 

 (Mex., &c., and widely dispersed.) 



* H Root perennial : flowers more diurnal? 



I. Liindheimeri. Finely appressed-pubescent (the stem retrorsely so), when young 

 canescent : leaves deeply 5-clef t or 5-parted, all or the 3 interior lobes ovate or ovate-lan- 

 ceolate with a much contracted base, the contracted portion often half the length of the 

 dilated lobe: peduncle slender, 1-2-flowered (1 to 3 inches long) : pedicels a quarter to half 

 inch long : sepals lanceolate-linear from an at length broadish base, fully an inch long, 

 erect, sparsely hirsute (all alike) : corolla light blue, clongated-funnelform with narrow 

 tube, about 31 inches long. /. heterophijUa, Torr. Bot. Mex. Bound. 149, not Ortega. 

 Rocky soil, W. Texas to New Mexico, Lindheimer, Wright. (Adjacent Mex., Gregy.) 



I. cathartica, Poir. Glabrous or nearly so, even to the calyx : leaves cordate, acu- 

 minate, entire, or some of them 3-lobed or deeply clef t : peduncles equalling the petiole, 

 1-5-flowered : outer sepals larger and ovate-lanceolate, the inner narrowly lanceolate, all 

 long-acuminate : corolla 2| or 3 inches long, pink-purple or crimson. Diet. Suppl. iv.633; 

 Griseb. Fl. W. Ind. 473. /. fastirjiata, Chapm. Fl. 433, not Sweet. Convolvulus pudibimdus, 

 Lindl. Bot. Reg. t. 999. Pharbitis cathartica, Griseb. 1. c. S. Florida, Blodyett, Palmer. Per- 

 haps introduced. (Bahamas to Brazil.) 



* * Stigma 2-lobed or entire: ovules only 4 and proper cells of the ovary only 2 , but these in 

 some divided by cellular matter forming an additional partition between the two seeds: sepals 

 membranaceous, or rather fleshy, or becoming coriaceous, mostly very much imbricated. 



