CONVOLVULACEAE 961 



4. CALONYCTION Choisy. 

 Perennial twining vines, often with a milky sap. Leaves alternate : blades broad. 

 Flowers fragrant. Calyx pedicelled : sepals 5, herbaceous, becoming leathery, the outer 

 sometimes horned at the apex. C orolla white, expanding in the evening, salverform : 

 tube elongated, not dilated at the throat : limb ample, contorted. Stamens 5. Ovary 2-4- 

 celled. Styles united to the capitate-didymous stigma. Ovules 4, 2 in 2 cavities, or soli- 

 tary in four cavities. Capsule longer than broad. 



1. Calonyction Bona-nox ( L. ) Small. Foliage glabrous. Stems extensively twin- 

 ing, 3-2o m. long, with a milk-like sap : leaf-blades ovate or suborbicular, 5-15 cm. long, 

 entire or hastately 3-5-lobed, acuminate, cordate ; petioles as long as the blades or longer : 

 peduncles stout, 1-7-flowered : sepals appressed to the corolla-tube, about 1 cm. long, oblong 

 or ovate-oblong, the outer ones with infraterminal tail-like or horn-like appendages : corolla 

 salverform ; tube slender, 10-12 cm. long ; limb 10-13 cm. broad, the externally green ribs 

 ending in short cusps : capsules ovoid or oblong-ovoid, 2 cm. long, acute : seeds glabrous 

 or nearly so. [Ipomoen Bona-nox L.] 



In swamps and thickets, peninsular Florida and the Kevs. Throughout the tropics. Spring to 

 fall. 



. 5. QUAMOCLIT Moench. 

 Annual or perennial twining vines, with often glabrous foliage. Leaves alternate : 

 blades entire, lobed or pinnately parted. Flowers in axillary cymes, or solitary. Sepals 

 5, membranous or herbaceous, equal or nearly so. Corolla often scarlet, salverform, ex- 

 panding during the daytime : tube narrowly funnelform : limb spreading, shorter than the 

 tube, 5-lobed. Stamens 5, exserted : filaments filiform. Ovary 2-celled or falsely 4-celled. 

 Styles united. Stigma capitate. Ovules 4. Capsules subglobose or somewhat elongated, 

 usually 4-celled. Seeds 4. Our species annual. The plants bloom in the summer and fall. 



Leaf-blades pinnately parted into narrow segments : sepals obtuse or mucronate. 1. Q. QuamocUt. 



Leaf-blades entire : sepals acuminate. 2. Q. coccinea. 



1. Quamoclit QuamocUt (L. ) Britton. Stems twining, several ni. long: leaf- 

 blades 2-10 cm. long, pinnately-parted ; segments narrowly linear : peduncles 1-3-tiowered : 

 pedicels club-shaped : sepals appressed to the corolla-tube, oblong, 3-5 mm. long, obtuse 

 or mucronate, without appendages : corolla scarlet-red ; tube club-shaped, 2.5-3 cm. long ; 

 lobes ovate or triangular : capsules ovoid, 8-10 mm. long. \_Tpomoea (^iiamodit L. ] 



In waste places and cultivated grounds, Virginia to Kansas. Florida, Texas and tropical America, 

 whence naturalized. Cypress Vine. 



2. Quamoclit coccinea (L. ) Moench. Stems climbing, several m. long, branching : 

 leaf-blades ovate, 3-10 cm. long, acuminate, entire, cordate ; petioles as long as the blades, 

 or shorter : peduncles 2-several-fiowered, commonly stouter than the i^edicels : sepals ap- 

 pressed to the tips, oblong, with infraterminal appendages, outer as broad as long : corolla 

 scarlet or orange-tinged ; tube 2-4 cm. long ; limb cup-like, 1.5-2 cm. broad : capsules sub- 

 globose, 7-8 mm. in diameter : seeds nearly glabrous. [Ipomoea coccinea L. ] 



On banks and in thickets, Pennsylvania to Missouri, Florida, Arizona and tropical America. 

 Naturalized eastward. Red Morning-glory. 



6. IPOMOEA L. 



Annual or perennial climbing or trailing vines, or rarely upright plants. Leaves 

 alternate : blades entire, angled or lobed. Flowers solitary on axillary peduncles, or in 

 cymes. Sepals 5, membranous or rather fleshy sometimes becoming leathery, closely im- 

 bricated, not elongated. Corolla white, pink, blue, purple or crimson, funnelform : limb 

 usually spreading. Stamens 5, included. Ovary 2- or 4-celled, the cavities more or less 

 completely divided between the ovules. Styles united. Capsule mostly septifragally 2 or 

 4-valved. Seeds often pubescent. The plants flower mainly in the summer, or throughout 

 the year in the south. Morning-glory. 



A. stems prostrate and creeping or climbing. 

 Stems creeping. 



Corolla-limb white : leaf-blades oblong to ovate in outline, mainly lobed. 1. I. littoralit:. 



Corolla-limb purple : leaf-blades suborbicular or broader than long, notched 



at the apex. 2. /. Pe^-Caprae. 



Stems twining or rarely trailing but never creeping. 

 a. Leaf-blades entire or S-lobed. 

 Sepals obtuse or mucronate. 



Leaf-blades never sagittate : inner sepals over 1 em. long. 

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