.846 CONVOLVULACE^K. (CONVOLVULUS FA3ULY.) 



8. STYLISMA, Raf. 



Sepals 5. Corolla bcll-shapeil, liairy. Stamens included. Styles 2, distinct 

 or united below, entire : stigmas ]>eltatc. Ovary 2-celled, 4-ovulcd. Capsule 

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

 flowers on axillary peduncles which arc longer than the leaves. 



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

 cordate, obtuse or emarginatc at the apex, mucronatc ; peduncles filiform, 1-7- 

 flowercd ; sepals ovate, acute, smootli, 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-flowercd peduncles, and more pubescent sepals. (Convolvulus hu- 

 mistratus, Walt. C. tenellus, Eli.) — 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, mucronatc, truncate or slightly cordate at the base, sliort-petioled ; 

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

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

 purple; filaments smooth; styles distinct. (Convolvulus aquatieus, 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-flowcred ; bracts linear, 

 a.s long as the flower ; sepals ovate-lanceqlate, 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. 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 pubescent 

 creeping herbs, with broadly cordate petiolcd 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. U — Stems filiform, 6'- 12' 

 long. Leaves ^'-Ij' in diameter, on petioles 1*- 4' long. Peduncles shorter 

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



10. CUSCUTA, Touni. PoDDi-K. 



Calyx 4 -5-cleft, or 4 - .^-sepalous. Corolla globular-urn-shapcd, bell-shaficd, 

 or somewhat tubular, -1 -.5 deft. Stamens 4-5, with fimbriate mostly confluent 

 ncalca at the base. Ovary 2-cclled, 4-ovukd. Stylos 2 : stigmas cji]>itate (in 



