CONVOLVULACE.E. (CONVOLVULUS FAMILY.) 331 



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

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

 July - Sept Stems 2- 3 long. Leaves T-3' long. Corolla 10" long. 



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

 linear-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 ; tila- 

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

 July - Sept. Stems 2 - 3 long. Leaves \' - 1' 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, tomentose (2 or more long) ; 

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

 shorter than the leaf, 1 -flowered ; calyx large, the sepals acute ; corolla very 

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

 South Florida ( Garber). 



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. y. Stems fili- 

 form, 6' -12' long. Leaves i'-lj' in diameter, on petioles l'-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 - 5-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 5-cleft : flowers pedicellate. 

 M- Lobes of the corolla acute. 



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

 cymes ; lol.es of the calyx broad and obtuse, of the corolla lanceolate, acumi- 

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



