CONVOLVULACE^E. (CONVOLVULUS FAMILY.; 373 



2. IPOMCEA, L. Morning-Glory. 



Calyx naked at the base. Corolla bell-shaped, funnel-form, &c, twisted in 

 the bud. Stamens included. Stigma capitate, often 2 - 3-lobed. Pod 2-celled, 

 or in one group 3-celled; the cells 2-seeded. (Name, according to Linnaeus, 

 from Xyjr, i7rds, a Bindweed [which it is not], and o/xoios, like.) 



§ 1. PIlARBITIS, Choisy. Pod 3- {rarely 4-) celled; the cells 2-seeded. 



1. I. purpurea, Lam. (Common Morning-Glory.) Annual; stems re= 

 trorsely hairy; leaves heart-shaped, acuminate, entire; peduncles long umbellately 

 3 - 5-fiowered ; calyx bristly-hairy below; corolla funnel-form (2' long), purple, 

 varying to white. (Convolvulus purpureus, L. Pharbitis hispida> Choisy.) — 

 Around dwellings, escaping from cultivation. (Adv. from Trop. Amer.) 



2. I. Nil, Roth. ( Smaller M. ) Stems retrorsely hairy ; leaves heart-shaped, 

 3-lobed, the lobes acute or acuminate ; peduncles short, or rather long, 1-3 flow- 

 ered ; calyx densely hairy below ; corolla white and purple or pale blue ( 1' - 1^' 

 long). (Conv. Nil. & C. hederaceus, L.) — Banks and near dwellings, from 

 Maryland southward. (Adv. from Trop. Amer. ?) 



§ 2. IPOMCEA, Choisy. Pod 2-celled; the cells 2-seeded. 



3. I. lacundsa, L. Annual ; rather smooth ; stem twining and creeping, 

 slender ; leaves heart-shaped, pointed, entire or angled-lobed ; peduncles short, 1 - 

 3-flowered ; sepals lance-oblong, pointed, bristly-ciliate or hairy, half the length of 

 the sharply 5-lobed (white, |'-£'long) corolla. (C. micranthus, Riddell.) — 

 Woods and fields, Penn. to Illinois and soutlrward. Aug. 



4. I. pandurata, Meyer. (Wild Potato-vine. Man-of-the-Earth.) 

 Perennial, smooth or nearly so when old, trailing or sometimes twining ; leaves 

 regularly heart-shaped, pointed, occasionally some of them contracted at the 

 sides so as to be fiddle-shaped ; peduncles longer than the petioles ; 1 - 5-flowered ; 

 sepals smooth, ovate-oblong, very obtuse; corolla open-funnel-form (3' long), white 

 with purple in the tube. — Sandy fields and banks, from Connecticut to Illinois 

 and southward. June- Aug. — Stems long and stout, from a huge root, which 

 often weighs 10-20 pounds. Flowers opening in bright sunshine. 



3. CONVOLVULUS, L. Bindweed. 



Calyx naked at the base. Corolla open funnel-form or bell-shaped. Stamens 

 included. Style 1 : stigmas 2, linear, often revolute. Pod 2-celled; the cells 2- 

 seeded. — Stems twining, procumbent, or often erect-spreading. Flowers mostly 

 opening at dawn. (Name from convolvo, to entwine.) 



1. C. arvensis, L. (Bindweed.) Perennial; stem procumbent or twin- 

 ing, and low ; leaves ovate-oblong, arrow-shaped, with the lobes at the base acute ; 

 peduncles mostly 1-flowered; bracts minute, remote; corolla (9" long) white or 

 *<ngcd with reddish. — Fields, near the coast : likely to become a troublesome 

 weed. June. (Nat. from Eu.) 



4. CALYSTEGIA, R.Br. Bracted Bindweed. 



Calyx enclosed in 2 large and mostly heart-shaped leafy bracts : sepals equal 

 Corolla bell-funnel-form, the border obscurely 5-lobed or entire. Stamens in- 



