ORDER 93. CONVOLVULACEJE. 571 



a Ovary 3-celled. Stigma capitate, granulate, not lobed PIIARBITIS. 3 



a Ovary 4-cclled. Stamens included. Corollas, large BATATAS. -2 



Stamens exserted. Corollas rather small QUAMOCLIT. 1 



1. QUA'MOCLIT, Tourn. CYPRESS-VINE. Sepals 5, mostly mucron- 

 ute; corolla tubular-cylindric, with a salver-form border; stamens ex- 

 scrted ; style 1, stigma capitate, 2-lobecl ; ovary 4-celled, cells 1-seeded. 

 Twining herbs, mostly American. (Fig. 303.) 



1 Q. vulgaris Choisy. CYPRESS-VINE. Lvs. pinnatifid to the midvein, segment* 

 linear, parallel, acuto; ped. l-flo\vered; sep. ovate-lanceolate. (D An exceed- 

 ingly delicate vine, Penn. (Eaton) and S. States generally cultivated. Stems 

 glabrous, very slender, twining and climbing to the height of 5 lOf. Fls. much 

 smaller than those of the common morning glory, scarlet, varying to crimson and 

 rose-color. Trained upon twine it forms an exquisite awning. July, Aug. f 

 E. Ind. 



2 Q. coccinea Moench. Lvs. cordate, acuminate, entire or angular at base ; ped. 

 elongated, about 5-flowered ; cal awned. X> S. States, rare in the Western, 

 along rivers, frequent in gardens. Fls. very delicate, 1' long, limb spreading 9", 

 light scarlet, nearly entire. Jn. Aug. (Ipomaea L.) 



2. BATATAS, Humph. SWEET POTATO. (The original Indian name 

 of the common potato, transferred.) Calyx of 5 sepals ; corolla cam- 

 panulate, with a spreading limb ; stamens 5, included ; style simple; 

 stigma capitate, 2-lobed ; capsule 4-celled, 4-valved, with 4 erect seeds. 

 Herbs, or shrubby, chiefly American. Juice milky. 



1 B. littoralis Chois. Creeping, sending out runners; Ivs. smooth, petiolatc, 

 thick, sinnate, with 3 to 5 rounded lobes, or somewhat panduriform, emarginate. 

 cordate; ptd. l-flowered, as long as the leaf; sepals ovate, abruptly acuminate ; 

 seeds tomentous. U Sand hills near the coast, S. Car. to Fla. Fls. large. Stam. 

 much shorter than the tnbo of the yellowish white corolla. Sty. with 2 capitate 

 stigmas. Aug. Oct. (Convolvulus L. C. obtusilobus MX.) 



2 B. macrorhiza. Creeping or twining ; Ivs. cordate, entire, sinuate or lobed, 

 tomentous-pubescent beneath ; ped. 1 to 5-flowered, longer than the petioles but 

 shorter than the leaves; sep. ovate, obtuse; seeds villous with long hairs. 11 

 Sandy soil, islands of S. Car. and Ga. (Elliott). Rt. fusiform, attaining a larg<> 

 size. Sts. several feet in length, pubescent. Ped. 2 to 3' long. Cor. largo, 

 purplish, white. Stam. barely included. Stig. 2, capitate. Jn. Oct. (B. 

 Jalapa (?) Chois. Convolvulus Ell.) 



3 B. edulis Chois. SWEET POTATO. Creeping, or twining ; Ivs. variously 3 

 to ^-palmate or pedatt-lobed or angled, lobes acute, base cordate with a broad sinus, 

 5-veined, smoothish; ped. 3 to 5-flowered, as long or longer than the petioles. U 

 Root bearing oblong, terete tubers which taper to both ends. Sts. 4 to 8f long. 

 Lvs. 2 to 5' long, on petioles 2 to G'. Fls. showy, rose-purple. J E. India. (Con- 

 volvulus Batatas L.) Extensively cultivated West and South for its rich, nu 

 tritious tubers. (Fig. 56.) 



3. PHAR'BITIS, Chois. MORNING GLORY. (German farbe, color ; 

 in reference to the brilliant flowers.) Calyx 5-sepaled ; corolla cam- 

 panulate or inclining to funnel-form ; style single ; stigma capitate, 

 granulate ; ovary 3 (rarely 4)-celled, cells 2-seeded. Beautiful climb- 

 ing and twining herbs, everywhere cultivated for ornament. 



1 P purpurea. St. climbing and twining, retrorsely pilous ; Ivs. cordate, entire; 

 fl. nodding; ped. 2 5-flowered; pedicels thick; cal. hispid. OD In fields, Mid. 

 and W. States. Stems climbing many feet. Leaves roundish, heart-shaped. 

 Flowers large, beautiful, generally of a dark purple, sometimes blue, flesh-colored, 

 striped, &c. A well known and favorite climber and free flower, of the easiest 

 culture. Jn. f (Fig. 49, 338.) (P. hispida Chois. Convolvulus L.) 



