334 CONVOLVULACE^E. (CONVOLVULUS FAMILY.) 



ing to white. (Convolvulus puvpureus, L. Pharbitis lispida, Choisy ) 

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



2. I. NIL, Roth. (MORNING-GLORY.) Stems retrorsely luury ; leaves heart- 

 shaped, 3-lobed,-thG lobes acute or acuminate; peduncles short, or rather long, 

 1 - 3-flowered ; calyx densely hairy below; corolla white and purple or pale 

 blue, (l) (Conv. Nil. C. hederaceus, L.) Banks and near dwellings, from 

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



2. IPOMCEA, Choisy. PodZ-celled; the cells 2-seeded. 



3. I. lacimdSJl, L. Rather smooth; stem twining and creeping, slen- 

 der ; leaves heart-shaped, pointed, entire or anglcd-lobed, long-petioled ; pedun- 

 cles short, 1 3-flowered; sepals lance-oblong, pointed, bristly -ciliate or hairy, half 

 the length of the sharply 5-lobed (white) corolla; pod sparingly hairy, (l) (C. 

 micranthus, Riddell.) Woods and fields, Ohio to Illinois, Virginia, and south- 

 ward. Aug. Corolla ' - $' long. 



4. 1, pandiirata, Meyer. (WILD POTATO-VINE. MAN-OF-THE-EARTH.) 

 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, 1J. Sandy fields and dry banks, from Connecticut to Illinois and 

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

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



I. SAGITT!TA (Conv. sagittifolius, Michx.) is said by Pursh to grow in 

 Virginia; but it has not lately been met with so far north. I. COMMUTATA, 

 Roem. Sj- Sch. (I. tricocarpa, Ell.}, with purple flowers larger than those of No. 3, 

 is likely to occur in S. Virginia and Kentucky. 



BATATAS EDULIS, Choisy (Conv. Batatas, L.}, is the cultivated SWEET 

 POTATO. 



3. CONVOL-VUL-US, L. BINDWEED. 



Calyx naked at the base. Corolla mostly bell-shaped. Stamens included. 

 Style 1 : stigmas 2, linear, often re volute. 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.) Stem procumbent or twining, and 

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

 duncles mostly 1 -flowered; bracts minute, remote ; corolla (f long) white or 

 tinged with reddish. \\. Fields, near the coast: likely to become a trouble- 

 some weed. June. (Nat. from Eu.) 



4. CAL.YSTEOIA, 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-lobejl or entire. Star ions in- 

 eluded. Style 1 : stigmas 2, linear or oblong. Poc irnpcrfVrrly ^-celled or 1- 

 eelled, 4-seeded. Perennials, with heart-shaped P* arrow-shaped k-nvcs, :m<l 



