1 C. spithamaeus Br. St. erect or assurgent; lvs. oblong-lanceolate, subcordate, hoary-pubescent; ped. 1-flowered, about as long as the leaves.- An erect, downy species, 8-10' (a span) high, found in fields and hilly pastures, Can. to Penn. W. to Ill. Stem branching, leafy, bearing one, often two or more large, white flowers, on peduncles 2-4' long, issuing from near the root. Leaves 2-3' long, 1/2 as wide, oval, with an abrupt, cordate base, and on petioles 1/4 as long. Bracts concealing the calyx. June.
2 C. Sapium Br. Rutland Beauty. Glabrous; stem twining; lvs. cordate-sagittate, the lobes truncate and apex generally acute; ped. quadrangular, 1-flowered; bracts cordate, much longer than the calyx.- A vigorous climber, in hedges and low grounds, Can. to Car. W. to Iowa. Sts. 5 to 8f in length. Lvs. 2 to 4' long, half as wide. Fls. numerous, large, white with a reddish tinge. Bracts close to the corolla, concealing the calyx. Jn., Jl. † (Convolvulus L.)- The wild plant (Convolvulus repens L.) is often more or less pubescent.
3 C. Catesbeianus Ph. Tomenious; st. twining ; lvs. oblong-ovate, cordate or sagittate, acute or rather obtuse, petiolate, auricles obtuse; ped. 1-flowered longer than the petiole but shorter than the leaves; bracts lance-oblong, acute 1 (obtuse, Pursh, subacuminate, Choisy), cordate, twice longer than the calyx, half as long as the purple corolla.-Sandy soils, Car. and Ga. Sts. a few feet long. Lvs. small, 1 to 2' long. Cor. showy, 18" long. Apr., May.
4 C. paradoxus Ph. Differs from the foregoing in its bracts, which are " linear and remote from the flower.-Va. to Car." (Pursh). Probably a mere variety ; we venture to suggest that both may be only states of C. Sepium,
8. STYLIS'MA, Raf. (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.- Slender, creeping, soft-pubescent.
1 S. evolvuloides Chois. Lvs. oval or oblong or linear, entire, obtuse or rarely retuse at both ends, on short petioles; ped. longer than the leaves, 1 to 3-flowered : bracts subulate, shorter than, the pedicels; sep. ovate, acuminate, thrice shorter than the corolla; sty. distinct to near the base.- Dry, sandy or rocky soils, S. E. 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. (Convolvulus aquaticus Walt. C. trichosanthus Mx., C. tenellus Lam.)
2 S. Pickeringii Gray. Lvs. narrowly linear; bracts resembling the leaves, equaling the flower; sty. united to near the top; stem pubescence and peduncles as in No. 1.- Pine barrens, N. J. and N. Car. (Convolvulus Pickeringii Torr.)
9. DICHON'DRA, Forst. (Gr. double, grain; for its 2 seed-vessels.) Calyx 5-parted ; corolla campanulate, 5-cleft; ovaries 2, styles 2, stigmas thick; capsules utricular, 1-sceded.- Prostrate, with roundish-cordate or reniform lvs. and inconspicuous fls.
D. repens Forst. Lvs. much shorter than their petioles, pubescent or silky beneath, entire; ped. much shorter than the petioles, sep. oblong-spatulate, obtuse, villous, a little larger than the oval cor. segm.-Wet grounds, S. Statea 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 nourishment from other plants about which they twine from right to left. Stem yellowish or reddish. Lvs. none, or minute scales instead. Fls. variously aggregated.
§ Stigmas filiform, as well as the styles. Capsules regularly circumscissibele........................
§ Stigmas capitate. Capsule indebiscent, or never bursting at base. (*)
* Sepals united. Ovary and capsule globular-depressed. (1)
1 Flowers in subglobous cymes. Corolla withering at base of capsule.....
1 Flowers in paniculate cymes. Corolla withering at top of capsule.......
* 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. epilinum Weih. Flax Dodder. 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, growing on flax. Sts. reddish orange. Fls. yellowish white. Cal. thickish. Stam. included. Stig. acute. Caps, opening around the base. Jn. § Eur. (C. Europaea, Darl. and others, not of L.) 2 C. obtusiflora (H. B. K.) β. glandulosa Engelm. Sts. low, bright orange colored; fls. pedicellate, in loosely globular clusters, and dotted with red, shining glands; sep. rounded-obtuse, as well as the soon-reflexed cor. lobes; sty. thick, subulate, stig. capitate; ova-large, depressed, soon outgrowing the withered corolla, leaving it at its base; scales large, often exceeding the tube, deeply fringed. -Ga. (Pond), Fla. to La. Parasitic, mostly on Polygonum. Fls. 1 to l 1/4" long. Caps. 1 1/2 to 1 3/4" diam.
* Abridged from Dr. Engelmann's Monograph. See Prface
3 C. chlorocarpa Engelm. Low, brandling orange-colored; fls. usually 4-parted, short-pediceled, in scattered, globular clusters: cor. tube campanulate, nearly the length of the acute lobes and acute cal. segm.; scales small, 2-lobed, or oftener of small, lateral teeth; sty. thick, as long as the large ovary, caps, depressed, thin. - Wis. to Ark., also in Del. 011 Polygonum, &e. Fls. about 1" long. Fr. greenish yellow.