346 CONVOLVULACE^E. (CONVOLVULUS FAMILY.) 



8. STYLISMA, Raf. 



Sepals 5. Corolla bell-shaped, hairy. Stamens included. Styles 2, distinct 

 or united below, entire : stigmas peltate. Ovary 2-celled, 4-ovuled. Capsule 

 1 - 4-seeded. Perennial prostrate pubescent herbs, with entire leaves, and small 

 flowers on axillary peduncles which are longer than the leaves. 



1. S. humistrata. Hairy and roughish; leaves petioled, oblong, slightly 

 cordate, obtuse or cmarginate at the apex, mucronate ; peduncles filiform, 1-7- 

 flowered ; sepals ovate, acute, smooth, fringed on the margins ; capsule smooth, 

 nodding; bracts minute; corolla white; filaments hairy; styles united below. 

 Varies with linear or lanceolate, often acute, nearly sessile leaves, shorter and 

 uniformly 1 -flowered peduncles, and more pubescent sepals. (Convolvulus hu- 

 mistratus, Walt. C. tenellus, Ell.) Dry sandy pine barrens, Florida to South 

 Carolina, and westward. July -Sept. Stems 2 -3 long. Leaves l'-3' 

 long. Corolla 10" long. Capsule ovate, commonly 1 -seeded, crowned with a 

 tuft of hairs when young. 



2. S. aquatica. Silky-pubescent and somewhat hoary; leaves linear-ob- 

 long, obtuse, mucronate, truncate or slightly cordate at the base, short-petioled ; 

 peduncles 1-7 (mostly 3-)-flowered ; sepals ovate-lanceolate, acuminate, veiy 

 silky ; capsule erect, pubescent ; bracts subulate, as long as the pedicels ; corolla 

 purple; filaments smooth; styles distinct. (Convolvulus aquaticus, Walt.) 

 Margins of ponds, Florida to North Carolina, and westward. July - Sept. 

 Stems 2- 3 long. Leaves ' - 1' long. Corolla 5" long. 



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

 tuse, narrowed at the nearly sessile base ; peduncles 1 - 3-flowered ; bracts linear, 

 as long as the flower ; sepals ovate-lanceolate, very hairy, longer than the pedi- 

 cel ; 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. 



9. DICHONDBA, 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 pubescent 

 creeping herbs, with broadly cordate petioled leaves, and solitary bractless flow- 

 ers on axillary peduncles. 



1. D. repens, Forst., var. Carolinensis, Chois. Low grounds, Florida 

 to North Carolina, and westward. March -Oct. 1J. Stems filiform, 6' - 12' 

 long. Leaves '-!' in diameter, on petioles 1'- 4' long. Peduncles shorter 

 than the petioles. Calyx silky. Corolla minute, greenish white. 



10. CITSCUTA, 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 confluent 

 scales at the base. Ovary 2-celled, 4-ovuled. Styles 2 : stigmas capitate (in 



