264 SYSTEMATIC BOTANY. 



above ; flowers very small, in leafy, bracteate, forking racemes ; pedicels 

 nodding in fruit ; corolla minute ; achenia convex with hooked prickles. 

 In thickets, 2-4 feet high. July. 



Order LVI. CONVOLVULACE^: (Convolvulus Family). 



Herbs, or shrubs ; often with a milky juice. Stems trailing or 

 climbing", rarely erect. Leaves alternate, sometimes none. Stip- 

 ules none. Flowers often showy. Sepals 5, usually more or less 

 united at base, persistent. Corolla regular, limb 5-cleft or entire, 

 twisted and plaited in prefloration. Stamens 5, inserted at the 

 base of the corolla, alternate with its segments, when lobed. 

 Ovary 2-4, rarely I -celled, free from the calyx. Style I, rarely 

 more. Fruit a capsule, 2-4-celled, opening by septifragal dehis- 

 cence. Seeds few, large. 



f Stamens included, stigmas 

 2, linear Ipomoea. 

 Stamens protruded Qua- 

 moclit. 

 CONVOLVULACE^E. 



[Calyx inclosed in bracts Calystegia, 



Without green herbage Cuscuta. 



I. Ipomcea. Calyx 5-parted, naked. Corolla campanulate, fun- 

 nel-form ; limb with 5 plaits, and the border entire, or 5-lobed. Style 

 i, often 2-cleft at apex. Capsule 2-4-celled, 4-6-seeded. 



1. PURPUREA (Common Morning-glory). Stem twining, rough with re- 

 flexed hairs; leaves cordate, entire; peduncles elongated, 2-5-flowered ; 

 pedicels thickened ; sepals hispid, ovate-lanceolate, acute ; corolla funnel- 

 form, large, 2' long, with a spreading, entire border. June-September. 



2. Calystegia. Calyx 5-parted, included in 2 large, leafy bracts. 

 Corolla funnel-form. Stamens nearly equal, shorter than the limb. 

 Style i. Stigmas 2. Ovary imperfectly 2-4-celled. Capsule i-celled, 

 4-seeded. y. 



C. SEPIUM (Wild Morning-glory). Stem twining, mostly smooth ; leaves 

 sagittate ; peduncles sharply 4-angled, i-flowered ; bracts cordate, much 

 longer than the concealed calyx ; flowers large, 2' long, white, varying to 

 pale rose-color. In low thickets, 5-10 feet long. June-July. H. 



3. Quamoclit. Sepals 5, mostly mucronate. Corolla tubular 

 cylindric. Stamens exserted. Style i. Stigma capitate, 2-lobed. Ovary 

 4-celled ; cells i-seeded. 



Q. VULGARIS (Cypress Vine). Smooth; stem very slender, twining; 

 leaves deeply pinnatifid ; segments linear, parallel, acute ; peduncles i-flow- 

 ered ; flowers small, brilliant, scarlet. In cultivation. July-August. 



