190 American Midland Naturalist Monograph No. 7 



3. Leaves tinangular-hastate or sagittate; flowers single. 



4. Leaves hastate, the basal lobes angled ; plants glabrous or 

 sparsely pubescent; roadsides, and along fences, common. 

 June-Aug. American Bindweed [C. sepium sensu auth., 



non L.; C. fratcrriiflorus Mack. & Bush] 



C. americanus (Sims) Greene 



4. Leaves sagittate, the basal lobes rounded; plants copiously 

 soft-pubescent; peduncles usually not exceeding the 

 leaves; waste places, occasional; native of e. and s.e. 

 U.S.; on railroad ballast. Diamond L., Lake Co., Gates 



in 1907. Trailing Bindweed C. repens L. 



3. Leaves narrowly hastate; flowers double, pink; plants pubes- 

 cent; waste places, occasional; native of Asia. Japanese 



Bindweed C. japonicus Thunb. 



1. Corolla about 2 cm long; bracts small, attached some distance 

 below the flowers; fields and waste places, common; nat. from 

 Eur. June-Sept. Field Bindweed C. arvensis L. 



3. Ipomoea L. — Morning-glory 

 1. Calyx-lobes obtuse, glabrous, elliptical, 1.5-2 cm long; corolla 5-8 

 cm long, white, the tube piu'ple within; leaves ovate, cordate; 

 stem glabrous; capsules ovoid, 2- to 4-seeded; seeds hairy; root 

 perennial, often large; fields, thickets, and waste places through- 

 out 111. June-Sept. Wild Sweet-potato 



- /. pandurata (L.) G.F.W.Mey. 



1. Calyx-lobes acute or attenuate, pubescent; stem pubescent; cap- 

 sules globose; seeds glabrous; plants annual. 

 2. Calyx-lobes elliptical or lanceolate, acute or acuminate. 



3. Corolla 1.5-2.5 cm long, white; calyx 10-12 mm long, the 

 lobes ciliate, acuminate; leaves entire to 3-angled; fields 

 and along streams, s. III., extending northward to Peoria, 

 Woodford, and Hancock counties. July-Oct. Small- 

 flowered Morning-glory /. lacunosa L. 



3. Corolla 5-7 cm long, purple, pink, variegated, or white; calyx 

 12-16 mm long, hirsute toward the base; leaves ovate, cor- 

 date, rarely 3-lobed; fields and waste places; nativ^e of trop. 



Am. Aug.-Oct. Common Morning-glory 



- /. purpurea (L.) Roth 



2. Caly.K-lobes linear-lanceolate, attenuate, copiously hirsute below, 

 1.5-2.5 cm long; corolla 2.5-4 cm long, purple; leaves 3- 

 lobed; fields and waste groimd; native of trop. Am. July-Oct. 

 Ivy-leaved Morning-glory /. hederacea Jacq. 



4. Quanioclit Moench — Red Morning-gloi'y 

 Q. coccinea (L.) Moench. Fields and roadsides, occasional; native 

 of trop. Am. July-Oct. 



