574 Order 93.— CONVOLVULACE^. 



*8. STYLIS'MA, Eaf. (The name has reference to the plurality of the 

 styles.) Sepals 5, equal ; cor. campanulate ; ovary 2-celled ; styles 2, 

 rarely 3, stigmas capitate; stamens included. — 2[ Slender, creeping, 

 soft-pubescent. 



1 S. evolvuloides Chois. Lvs. oval or obloug or linear, entire, obtuse or rarely 

 retuse at both ends, on short petioles ; ped. longer than the leaves, 1 to 3-flowered ; 

 iracts sulmlaie, shorter than the pedicels; sep. ovate, acuminate, thrice shorter than 

 the corolla; sty. distinct to near the base. — if Dry, sandy, or rocky soils, S. B. Ohio 

 to Va., Ga. and La. St. trailing several feet, subsimple. Lvs. 1' to 18" long, 1 

 to 9" wide. Ped. 2 to 3'. Cor 8 to 10" long, white. Jn. — Sept. (ConvolviSus 

 aquaticus Walt. 0. trichosanthus Mx., C. tenellus Lam.) 



2 S. Pickeringii Gray. Lvs. narrowly linear; tracts resembling the leaves, 

 equaling the flower; sty. united to near the top; stem pubescence and peduncles as 

 in No. 1. — If Pine barrens, N. J. and N. Car. (Convolvulus Pickeringii Torr.) 



9. DICHON'DRA, Forst. (Gr. dig, double, xo'^^po?^ grain ; for its 2 

 seed-vessels.) Calyx 5 -parted ; corolla campanulate, 5-cleft; ovaries 2, 

 styles 2, stigmas thick; capsules utricular, 1-seeded. — If Prostrate, 

 with roundish-cordate or reniform lvs. and inconspicuous fls. 



D. ripens Forst. Lvs. much shorter than their petioles, pubescent or silky 

 beneath, entire ; ped. much shorter than the petioles, sep. oblong-spatulate, ob- 

 tuse, villous, a little larger than the oval cor. segm. — ^Wet grounds, S. States. A 

 little turfy creeper, rooting at every joint, 3 to 12' long. Lvs. varying from 3" 

 diam. to 9", petioles 1 to 3'. Cor. greenish white, 1 to 2'' broad. Mar. — May. 



10. CUSCUTA, Tourn.* Dodder. (Fig. 456.) Calyx 5 (rarely 4)- 

 cleft or sepaled ; corolla globular-campanulate, 5 (rarely 4)-cleft ; 

 stamens 5 (rarely 4), appendaged with scales or fringes at base; ovary 

 2-celled, 4-ovuled ; styles 2 ; capsules mostly 4-seeded ; embryo spirally 

 coiled, without cotyledons.—® Herbs without verdure, germinating in 

 the soil, at length withering at the root, and deriving their nourish- 

 ment from other plants about which they twine from right to left. .Stem 

 yellovs^sh or reddish. Lvs. none, or minute scales instead. Fls. var- 

 iously aggregated. 



§ stigmas filiform, as well ns the styles. Capsules regularly circumscissile Ko. 1 



§ Stigmas capitate. Capsule indehiscent, or never bursting at base. (*) 



* Sepals united. Ovary and capsule globular-depressed. (1) ' , 



1 Flowers in subglobous cymes. Corolla withering at base of capsule Nos. S— 4 



1 Flowers in panieulato cymes. Corolla withering at top of capsule No. 5 



* Sepals united. Ovary and capsule more or less conical (2) 



2 Corolla lobes acute, inflexed at the apex Nos. 6,7 



2 Corolla lobes obtuse, not inflexed Nos. 8, 9 



* Sepals distinct, surrounded by similar Imbricated bracts Nos. 10,11 



1 C. epiUnum Weih. Flax Doddee. Fls. sessile, in small, dense, remote 

 heads ; cal. 5-parted, segm. broad ; cor. globous-cylindric, scarcely longer than 

 the calyx, with acutish lobes, withering around the depressed-globous capsule ; 

 scales small, crenate-dentate ; sty. short. — Middle States, growhig on flax. Sts. 

 reddish orange. Fls. yellowish white. Cal. thickish. Stam. included. Stig: 

 acute. Caps, opening around the base. Jn. § Eur. (C. Europa3a, Darl. and 

 others, not of L.) 

 2 C. obtusifldra (H. B. K.) p. glandulSsa Engelm. Sts. low, bright orange 

 colored ; fls. pedicellate, in loosely globular clusters, and dotted with red, sMniTig 

 glands ; sep. rounded-obtuse, as well as the soon-reflexed cor. lobes ; sty. thick, 

 subulate, stig;. capitate ; ova-large, depressed, soon outgrowing the withered cor- 

 olla, leaving it at its base ; scales large, often exceeding the tube, deeply fringed. 

 — Ga. (Pond), Fla. to La. Parasitic, mostly on Polyganum. Fls. 1 to IJ" long. 

 Caps. l-J to If" dIam. 



♦ Abridged from Dr. Engelmann's Monograph. See Preface. 



