ORDER 95. CONVOLVULACE.E. 259 



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

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

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

 or shrubby, with milky juice. 



1 JEt. littoralis Chois. Creeping, sending ont runners ; 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. U Coast sauds, 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. if. Sands, S. C. to Fla. Root very large. (Ipomcea Michauxii Svvt.) 



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



as long as the petioles, v 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. b Beautiful, cultivated and spontaneous. 



1 P. pnrpurea 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. HEDERACEA, from S. Am., differs from P. Nil in the middle lobe of its Ivs., which ia 



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. 



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



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



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

 St} 7 le 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. 6 8 



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



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



2 I. oommutata 11. & S. Smoothish ; Ivs. cordate, entire or 3-lobed ; ped. as long 



as the petioles ; flowers 2 5, purple to pink, 18" ; sep. 5''. (T) Fields, S. July Oct. 



3 I. lacuiiosa. 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. (T) Dry 

 fields and hills, Penn. to 111., and S. 2 (if. August, September. 



4 B. Pes-Caprae Sw. Roughish ; leaves roundish, emarginate or 2-lobed. thick ; ped. 



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

 6 I. sagittli'olia. (Mx. 1 ) Glabrous; Ivs. cordate-sagittate; ped. as long as the pctiolu, 

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



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



tifid ; ped. 1- or 2-flowered ; corolla white, 1'. ii Ga., Fla. 20f. July October. 



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



above ; corolla large, yellow ; sepals S' 7 long, n N. Car. and Tenn. 



8 I. paudurata Meyer. Wild Potato. Leaves broad-cordate to panduriforin ; ped 



