OBDEE 93. CONYOLVULACB^E. 571 



a Ovary 3-celled. Stigma capitate, granulate, not lobecL PHARBITIS. 8 



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



Stamens exserted. Corollas rather small QCAMOCMT. 1 



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

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

 serted ; style 1, stigma capitate, 2-lobed; ovary 4-celled, cells 1-seeded. 

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



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

 linear, parallel, acute ; {ted. 1-flowered ; sep. ovate-lanceolate. (D An exceed- 

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

 glabrous, very slender, twining and climbing to the height of 5 IOC 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 Moencb. Lvs. cordate, acuminate, entire or angular at base ; ped. 

 elongated, about 5-flowered ; cal. awned. 3) 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, Rumph. 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, petiolate, 

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

 cordate; ped. \-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 tnbe of the yellowish white corolla. Sty. with 2 capitate 

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



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

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

 shorter than tke leaves; sep. ovate, obtuse; seeds villous with long hairs. 2 

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

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

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

 Jalapa (?) Chois. Convolvulus E1L) 



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

 to ^-palmate or pedate-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. 11 

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

 Lvs. 2 to 5' long, on petioles 2 to 6'. Fls. showy, rose-purple. \ 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. - 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, Ac. A well known and' favorite climber and free flower, of the easiest 

 culture. Jn. f (Fig. 49, 333.) (P. hispida Chois. Convolvulus L.) 



