CONVOLVULACE^. (CONVOLVULUS FAMILY.) 375 



2. IPOMCEA, L. Mokxing-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 <;roup .3-celled ; the cells 2-seeded. (Name, according to Linnaeus, 

 from lyj/, Inus, a Bindweed [which it is not], and ofxoios, like.) 



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



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

 trorsely hairy; leaves lienrt-shuped, acuminate, entire; jjcduncles long umbellately 

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

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

 Around dwellings, escaping from cultivation. (Adv. from Ti-op. Amcr.) 



2. I, Nil, Roth. (Smaller M.) Stems retrorsely hairy ; /eayes Aea>-<-sAapec?, 

 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 ( I' - 1^' 

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

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



§ 2. IPOMOEA, Choisy. Pod 2-celled; the cells 2-sccded. 



3. I. lacunosg,) L. Annual ; leather smooth ; stem twining and creeping, 

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

 3-flowered ; sepals hnice-ohlong, pointed, hristhj-ciliate or hairy, half the length of 

 the shai-ply 5-lobed (white, ^'- J' long) corolla. (C. micranthus, /2(rfc/e//.) — 

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



4. I. pandurata, Meyer. (Wild Potato-vixe. Man-of-tiie-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 fidille-shapcd ; peduncles lonr/er than the petioles ; I - 5-flowered ; 

 sppnls smooth, ovate-oblong, very obtuse; corolla open-funncl-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. (BiNDW'EED.) Perennial; stem jirocunibent 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, R.Br. Bracted Bindweed. 



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

 Corolla bell-funuel-forni, the border obscurely 5-lobed or entire. Stamens in- 



