Tribe III. CUSCUTEÆ. Ovary entire. Leafless parasitic twining herbs, never green. Embryo filiform, coiled, without cotyledons.
6. Cuscuta. The only genus of the group.
1. DICHÓNDRA, Forst.
Calyx 5-parted. Corolla broadly bell-shaped, 5-cleft. Stamens included. Styles, ovaries, and utricular 1–2-seeded capsules 2, distinct. Stigmas thick.—Small and creeping perennial herbs, soft pubescent, with kidney-shaped entire leaves, and axillary 1-flowered bractless peduncles. Corolla small, yellowish or white. (Name from δίς, double, and χόνδρος, a grain, from the fruit.)
1. D. rèpens, Forst. Leaves round kidney-shaped, pubescent, green both sides; corolla not exceeding the calyx (1–1½´´ long).—Wet ground, Va. to Tex., near the coast.
2. IPOMŒ̀A, L. Morning Glory.
Calyx not bracteate at base, but the outer sepals commonly larger. Corolla salver-form or funnel-form to nearly campanulate; the limb entire or slightly lobed. Style undivided, terminated by a single capitate or 2–3-globose stigma. Capsule globular, 4–6 (by abortion fewer) -seeded, 2–4-valved. (Name, according to Linnæus, from ἴψ, a Bindweed, and ὅμοιος, like; but ἴψ is a worm.)
§ 1 QUÁMOCLIT. Corolla salver-form, or with somewhat funnel-form but narrow tube; stamens and style exserted; flowers red. Annual twiners.
I. Quámoclit, L. (Cypress-Vine.) Leaves pinnately parted into linear-thread-shaped delicate parallel lobes; peduncles 1-flowered; corolla narrow, scarlet-red, or sometimes white. (Quamoclit vulgaris, Choisy.)—Sparingly spontaneous southward. (Trop. Amer., etc.)
I. coccínea, L. Leaves heart-shaped, acuminate, entire or angled, sepals awn-pointed; corolla light scarlet (1´ long). (Quamoclit coccinea, Moench.)—River banks, etc., Ohio to Ill., Va., and southward. (Probably indigenous in N. Mex. and Arizona.)