CONVOLVULACE^. (CONVOLVULUS FAMILY.) 331 



capsule smooth, nodding ; bracts minute ; corolla wiiite ; filaments hairy ; 

 styles united below. — Dry soil, Florida to South Carolina, and westward. 

 July -Sept. — Stems 2° -3° long. Leaves I'-S' long. Corolla 10" long. 



2. B. aquatica, Gray. Silkj^-pubescent and somewhat hoary ; leaves 

 liuear-oblong, truncate or slightly cordate at the base, short-petioled ; pedun- 

 cles 1-7- (mostly 3-) flowered ; sepals ovate-lanceolate, acuminate ; capsule 

 erect, pubescent ; bracts subulate, as long as the pedicels ; corolla purple ; fila- 

 ments smooth ; styles distinct. — Margins of ponds in the lower districts. 

 July - Sept. — Stems 2° - 3° long. Leaves |' - T long. Corolla 5" long. 



3. B. Pickeringii, Gray. Soft-pubescent or villous ; leaves linear ; 

 peduncles 1 - 3-fiowered ; bracts linear, as long as the flower; sepals ovate- 

 lanceolate, very hairy, longer than the pedicel ; corolla small, white ; styles 

 united nearly to the apex ; stamens slightly exserted. — Sandy pine barrens. 

 North Carolina, and northward. July -Sept. — Stems 2° -3° long. Leaves 

 12"- 15" long. Corolla 5" long. 



4. B. grandiflora, Gray. Stem prostrate, toraentose (2° or more long) ; 

 leaves oval, obtuse or emarginate, short-petioled (1^' long) ; peduncle mostly 

 shorter than the leaf, l-flowered ; calyx large, the sepals acute ; corolla very 

 large (2^' -3' long), purple ; capsule 4-seeded. — Sandy coast at Sarasota Bay, 

 South Florida {Garher), 



6. DICHONDRA, Forst. 



Calyx 5-parted, with the lobes obovate. Corolla somewhat wheel-shaped, 

 5-parted, shorter than the calyx. Stamens included. Ovaries 2, distinct, 

 2-ovuled. Styles 2 : stigmas capitate. Utricles 2, one-seeded. — Low pubes- 

 cent creeping herbs, with broadly cordate petioled leaves, and solitary bract- 

 less flowers on axillary peduncles. 



1. D. repens, Forst. — Low grounds. March -Oct. :^ — Stems fili- 

 form, 6' -12' long. Leaves i'-lj' in diameter, on petioles r-4' long. 

 Peduncles shorter than the petioles. Calyx silky. Corolla minute, greenish 

 white. 



7. CUSCUTA, Tourn. Dodder. 



Calyx 4 - 5-cleft, or 4 - 5-sepalous. Corolla globular-urn-shaped, bell-shaped, 

 or somewhat tubular, 4 - .'j-cleft. Stamens 4-5, with fimbriate mostly con- 

 fluent scales at the base. Ovary 2-celled, 4-ovuled. Styles 2 : stigmas capi- 

 tate (in our species). Capsule 4-seeded. Embryo filiform, coiled around 

 fleshy albumen. Cotyledons none. — Twining parasites, germinating in the 

 ground, but early decaying at the root. Stems filiform, yellow or reddish, 

 ■without leaves, or with minute scales in their place. Flowers white, small, 

 variously clustered. 



* Calyx 4 - b-cleft : floivers pedicellate. 

 -t- Lobes of the corolla acute. 

 1. C. arvensis, Beyrich. Low; flowers small, 5-parted, in cluster-like 

 cymes ; lobes of the calyx broad and obtuse, of the corolla lanceolate, acumi- 

 nate, spreading, inflexed at the point, longer than the tube ; scales ovate, often 



