308 Convolvulaceae 



tube of the corolla and alternate with its lobes ; anthers 

 2-celled, longitudinally dehiscent. Ovary superior, ses- 

 sile, 2-3-celled, with 2 ovules in each cell, entire or 

 2-4-divided ; styles 1-3. Fruit a 2-4-valved capsule or 

 of 2-4 distinct carpels. Seeds erect, villous, pubescent or 

 glabrous ; embryo plaited or crumpled. 



Stigmas capitate. 1. IPOMOEA. 



Stigmas filiform or oblong. 2. CONVOLVULUS. 



1. IPOMOEA L. MORNING-GLORY. 



Twining, trailing, ascending or rarely erect herbs with 

 large showy axillary solitary or cymose flowers. Sepals 

 equal or unequal. Corolla funnelform or campanulate, 

 the limb entire, 5-angled or 5-lobed. Stamens equal or 

 unequal, included ; filaments filiform or dilated at the 

 base ; anthers globose or ovoid ; ovary 2-4-celled, 4-6- 

 ovuled ; style filiform, included ; stigmas 1-2, capitate or 

 globose. Capsule septifragally 2-4-valved, 2-4-seeded. 



1. I. purpurea (L.) Roth. Annual, pubescent; stem retrorse- 

 ly hairy, twining or trailing; leaves broadly ovate, deeply cor- 

 date, acute or acuminate, 5-10 cm. broad; peduncles slender, 

 1-5-fiowered ; sepals lanceolate or oblong, acute, pubescent or 

 hirsute toward the base ; corolla 5-7 cm. long, blue or purple vary- 

 ing to white ; ovary 3-celled, rarely 2-celled ; capsule depressed- 

 globose, shorter than the sepals. 



An escape from gardens. Introduced from tropical America. 



2. CONVOLVULUS L. 



Herbs, mostly perennials with slender rootstocks and 

 trailing, twining or erect stems. Flowers axillary, soli- 

 tary or clustered, large and showy. Sepals nearly equal 

 or the outer larger, the calyx bractless or with a pair of 

 bracts at or near its base. Corolla and stamens as in 

 Ipomoea. Ovary 1-2-celled ; style filiform ; stigmas 2, 



