[*] Flowers solitary on long naked scapes or peduncles, without bractlets; corolla with a long curved tube and spreading 5-lobed limb.
1. A. uniflòrum, Gray. (One-flowered Cancer-root.) Stem subterranean or nearly so, very short, scaly, often branched, each branch sending up 1–3 slender one-flowered scapes (3–5´ high); divisions of the calyx lance-awl-shaped, half the length of the corolla, which is 1´ long, with 2 yellow bearded folds in the throat, and obovate lobes.—Damp woodlands, Newf. to Va. and Tex., and west to the Pacific. April, May.
2. A. fasciculàtum, Gray. Scaly stem erect and rising 3–4´ out of the ground, mostly longer than the crowded peduncles; divisions of the calyx triangular, very much shorter than the corolla, which has rounded short lobes.—Sandy ground, L. Michigan to Minn., southward west of the Mississippi, and westward. On Artemisia, Eriogonum, etc. May.
[*][*] Caulescent, flowers densely spicate, with 1–2 bractlets at base of calyx; corolla 2-lipped, the upper lip less or not at all 2-cleft.
3. A. Ludoviciànum, Gray. Glandular-pubescent, branched (3–12´ high); corolla somewhat curved, twice the length of the narrow lanceolate calyx-lobes; the lips equal in length. (Phelipæa Ludoviciana, Walp.)—Minn. to Ill. and Tex., and westward.
4. OROBÁNCHE, Tourn. Broom-rape.
Flowers spicate, sessile. Calyx cleft before and behind almost or quite to the base, the divisions usually 2-cleft. Corolla 2-lipped; upper lip erect, 2-lobed or emarginate, the lower spreading, broadly 3-lobed. Stamens included.—Old World parasites, on roots of various plants.
O. mìnor, L. A span to a foot high, pubescent, pale yellowish-brown, or with purplish-tinged flowers in a rather loose spike; corolla 6´´ long.—Parasitic on clover, N. J. to Va. Sparingly and probably recently introduced.
(Addendum) O. ramòsa, L. Often branched, 6´ high or less, of a pale straw-color; flowers 3-bracteate, the lateral bracts small; calyx 4-toothed, split at the back; corolla pale blue, 6–8´´ long.—On the roots of hemp and tobacco; Ky. (Int. from Eu.)
Order 77. LENTIBULARIÀCEÆ. (Bladderwort Family.)