CONVOLVULACE^. (CONVOLVULUS FAMILY.) 375 



2. IPOMOEA, L. Morning-Gloet. 



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

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

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

 from iijr, tiros, a Bindweed [which it is not], and o/ioios, like.) 



§ 1. PHARBITIS, Choisy. Pod 3- {rarely 4-) ceUed; the ceUs 2-seeded. 



1. I. PUKPtJEEA, Lam. (Common Morning-Gloey.) Annual; stems re- 

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

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

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

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



2. I. Nil, Roth. (SmallerM.) Stems retrorsely hairy ; fcaues Aear(-s/ia/)e(i, 

 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. hederkceus, £.) — Banks and near dweUings, from 

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



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



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

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

 3-flowercd ; sepals lance-oblong, pointed, brisily-ciliate or hairy, half the length of 

 the shai-ply 5-lobed (white, J' -J' long) corolla. (C. micvinthus, Eidddl.) — 

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



4. I. pandurita, Meyer. (Wild Potato-vine. Man-of-the-Eaeth. ) 

 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 ; I- 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 

 tinged with reddish. — Fields, near the coast: likely to become a troublesome 

 weed. June. (Nat. from Eu.) 



4. CALYSTEGIA, E.Br. Beacted 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- 



