ORDER 95. CONVOLVULACE^E. 259 



2. BATATAS, Rurnpk. SWEET POTATO. Cal. of 5 sepals. Cor. cam- 

 panulate, with a spreading limb. Stam. 5, included. Style simple, stigma 

 capitate, 2-lobed. Capsule 4-celled, 4-valved, with 4 erect seeds. ^ Herbs, 

 or shrubby, with milky juice. 



1 St. littoralis Chois. Creeping, sending ont ranners ; Ivs. smooth, thick, sinuate 



with 35 rounded lobes and cordate at base ; ped. 1-flowered, as long as the leaf; sep. 

 abrupt-pointed ; seeds tomentous ; corolla white, if. Coast sands, S. Aug. Oct. 



2 B. macrorliiza Wood. Creeping or twining; Ivs. cordate, lobed or entire, soft- 



downy beneath ; ped. 1-5-flowered, shorter than the leaves ; cor. purple ; seeds vil- 

 lous. 11 Sands, S. C..to Fla. Root very large. (Ipomcea Michanxii Swt.) 



3 B. edulis. Sweet Potato. Lvs. 3-5-lobed or angled, lobes' acute ; ped. 3-5-flowered, 



as long as the petioles, y. W. Indies. Extensively cult, for its sweet tubers. Purple. 



3. PHARBITIS, Chois. MORNING GLORY.^Calyx 5-sepalled. Cor. bell- 

 funnel-form. Sty. single, stig. capitate, granulate. Ov. 3-(rarely 4-)celled, 

 cells 2-seeded. J? Beautiful, cultivated and spontaneous. 



1 P. purpurea Wood. Twining stem clothed with reversed hairs; Ivs. cordate, en- 



tire ; ped. 2-5-flowered ; corolla large, dark purple, varying to blue, flesh-color, &c., 

 appearing in long succession, in fields and gardens. June, July. 



2 P. Nil Chois. Some hairy ; leaves cordate, 3-lobed ; ped. 1-3-flowered, shorter 



than the petioles ; sepals ovate, long-pointed, corolla tube white, border indigo (nil) 

 blue. Gardens, and in fields. July, Aug. 



3 P. HEBERACEA, from S. Am., differs from P. Nil in the middle lobe of its Ivs., which is 



ovate, and contracted at base ; ped. 1-flwd. ; cor. 2' or more broad, varying in purple 

 and blue, blue and white, pink and white, &c. The hybrid P. LIMBATA has a purple 

 star with a white border and leaves scarcely lobed. (T) 



4 P. LEARII, from Mexico, has ped. longer than the cordate, velvet-silky leaves, each 



bearing a cluster of magenta-blue-red flowers. Greenhouse, y.. 10 15f. 



4. IPOMCEA, L. Cal. 5-sepalled. Cor. bell-funnel-form. Sta. included. 

 Style 1, stigma capitate. Ov. and capsule 2-celled, cells 2-seeded. Herbs, 

 shrubs, or trees. Our species are herbs creeping or climbing. 



* Flowers capitate, involucrate, small, blue. Sepals hairy No. 1 



* Flowers separate. a Sepals bristly ciliate, capsules somewhat hairy Nos. 2, 3 



a Sepals glabrous. b Flowers purple. Maritime Nos. 4, 5 



b Flowers white, rarely yellow. . .Nos. 68 



1 1. tamnifolia L. Hairy; leaves ovate, cordate, acuminate, large, equalling the 



peduncles ; fls. crowded, 9", with linear bracts and sepals, d) Ga. to La. Jl. Sept. 



2 1. commutata II. & S. Smoothish ; Ivs. cordate, entire or 3-lobed ; ped. as long 



as the petioles ; flowers 25, purple to pink, IS" ; sep. 5". (I) Fields, S. July Oct. 



3 I. lacunosa. L. Puberulent ; Ivs. cordate, entire or angular-lobed ; ped. ^ as long 



as the petioles ; flowers 1 3, white, with a purplish rim, 1', sepals as long. Dry 

 fields and hills, Penn. to 111., and S. 2-6f. August, September. 



4 I. Pes-Caprie Sw. Ronghish ; leaves roundish, emarginate or 2-lobed, thick; ped. 



as long as the petioles ; fls. 1 5, purple, 3' long. Coasts of Ga. and Fla. June + . 



5 I. sagittifolia (Mx.) Glabrous ; Ivs. cordate-sagittate ; ped. as long as the petiole, 



much shorter than the one large (3') purple flower. 11 Marshes, S. June-K 



6 I. sinuata Ort. Lvs. palmately 7-cleft, varying to sinuate-lobed ; segments pinna- 



tifid ; ped. 1- or 2-flowered ; corolla white, V. "n Ga., Fla. 20f. July October. 



7 I. ciliolata Pers. .Leaves cordate, entire, acuminate ; ped. 1-flowered, 2-bracted 



above ; corolla large, yellow ; sepals S" long. 11 N. Car. and Tenn. 

 $ I. paudurata Meyer. Wild Potato. Leaves broad-cordate to panduriform; ped. 



