152 CONVOLVULACEAE. 



cent base and a narrow tip. Corolla white, blue, or purple, funnelform. 

 Seeds glabrous. MORNING-GLORY. 



Calyx minutely or obscurely pubescent; lobes 2 cm. long or less. 1- P. cathartics 

 Calyx bristly-pubescent ; lobes 2.5 cm. long or more. - P. Ml. 



1. P. cathartica (Poir.) Choisy. Perennial, minutely strigillose or glabrate: 

 leaf-blades broadly ovate, 5-9 cm. long, entire or 3-lobed: sepals ovate-lanceo- 

 late, 1-2 cm. long, acuminate: corolla-limb pink-purple to white, 6-8 cm. \vi>ie. 

 Hammocks. F. K. (Ber., Bah., Cuba, Ant.) 



2. P. Nil (L.) Choisy. Annual, hispid or hirsute: leaf -blades broadly ovate 

 to suborbicular in outline, 6-16 cm. long, 3-angled or 3-lobed, the lobes acute: 

 sepals 2.5-4 cm. long: corolla- limb deep-blue, 4-6 cm. wide. Hammocks. 

 Nat. of Africa, and cultivated. (Ant.) 



5. IPOMOEA L. Climbing or trailing vines or rarely upright plants. 

 Leaf-blades entire, angled, or divided. Flowers solitary on axillary peduncles, 

 or in cymes. Calyx-lobes coriaceous or membranous, or rarely fleshy. Corolla 

 funnelform, the limb usually spreading. Capsule mostly septifragally 2- or 

 4-valved. Seeds often pubescent. MORNING-GLORY. 



Stem and branches creeping. 



Corolla-limb white: leaf-blades several-lohed. 1. /. stolonifcra. 



Corolla-limb purple : leaf-blades not lobed, notched at the apex. 2. /. I'cs-C'aprat. 

 Stem and branches twining or trailing. 



Leaf-blades sagittate or hastate : Inner sepals less than 1 cm. 



long. 

 Sepals equal, about 6 mm. long: corolla-limb less than 3 



cm. wide. ' ' t.in,i**tma. 



Sepals unequal, 7-0 mm. long : corolla-limb over 5 cm. wide. 4. /. tapitlata. 

 Leaf-blades ovate, entire or angulately lobed. 5. /. Batatat. 



1. I. stolonifera (Cyrill.) Poir. Leaf-blades 2-5 cm. long, the early ones 

 ovate to oblong, the later ones pandurate or more deeply lolu-il. mostly trun- 

 cate or cordate at the base: sepals oblong to oval, 1-1.5 cm. long, mucronate 

 or acuminate: capsules subglobose, 1.5 cm. long. Coastal sand-dunes. (Bah., 



int.) 



2. I. Pes-Caprae (L.) Sweet. Leaf-blades 6-10 cm. long and as broad, rounded 

 or cordate at the base: sepals oval or suborbicular, obtuse: corolla 4-5 cm. 

 long: capsules globose-ovoid, 1.5 cm. long. Coastal sand-dunes. F. K. (Ber., 

 Bah., Cuba, Ant.) 



3. I. tenuissima Choisy. Stems twining: leaf-blades lanceolate or linear- 

 lanceolate, 2-5 cm. long, obtuse and mucronulate: sepals ovate-lanceolate, 

 obtuse, ciliate: corolla purple, 3-4 cm. long: capsules globose. Pinelands. 

 F. K (Cuba.) 



4. I. sagittate Cav. Stems twining: leaf-blades 3-10 cm. long, sagittate or 

 hastate-sagittate, the segments linear or lanceolate, the basal ones about half 

 as long as the terminal one: sepals 6-9 mm. long: corolla 5-6 cm. long. 

 Everglades. F. K. (Ber., Bah., Cuba.) 



6. I. Batatas (L.) Lam. Stems from tuberous edible roots, the branches trail- 

 ing: leaf-blades ovate, 5-11 cm. long, entire or angulately lobed, cordate: 

 sepals unequal, ovate-lanceolate or lanceolate, acuminate: corolla 3-5 cm. long, 

 white varying to shades of pink or purple. Pinelands, hammocks and waste 

 places. Nat of the E. Indies, and cultivated. (Ber., Bah., Cuba, Ant.) 

 SWIFT-POTATO. 



6. CALONYCTION Choisy. High-twining vines. Leaf-blades broad. 

 Flowers showy. Calyx-lobes herbaceous, becoming leathery, the outer ones 

 sometimes horned at the apex. Corolla white, expanding in the evening, salver- 



