Broom rape Family. 127 



-lipped: upper lip vaulted, covering the 4-stamens; lower lip spreading', 

 3-Iobed. Anther-cells equal. 



P. canadensis L. Common L. Hairy, stems usually tufted, 6-1:2 inches 

 high; leaves alternate, petioled. pinnatifid, segments toothed; flowers in a 

 dense spike; calyx incised in front, oblique; upper lip of corolla hooded, in- 

 curved, with 2 teeth. Capsule flattish, sword-beaked. Fields and woods; 

 May-July; common; Winneshiek, Allamakee, Clayton, Johnson, Decatus, 

 Story, Pottawattamie, Shelby, Calhoun, Hancock, Cerro Gordo, Dallas, 

 Emmet, and Lyon counties; reported from Fayette, Scott, and Muscatine 

 counties. 



P. lanceolata Mx. Stem 1-2 feet high, somewhat hairy or glabrous; 

 leaves mostly opposite, lance-oblong, doubly crenate-toothed; spike dense; 

 calyx 2-lobed; upper lip of the corolla larger, covering the lower; capsule 

 ovate, about the length of the calyx. Swampy places; August-September; 

 frequent; Winneshiek, . Johnson, Winnebago, Hancock, Emmet, and Lyon 

 counties; reported from. Fayette, Scott, and Story counties. 



MELAMPYRUM L. Ours a small branching annual herb, with opposite 

 entire petioled lanceolate or linear-lanceolate leaves, and small white or 

 whitish flowers solitary in the upper axils or more or less spicate. Calyx 4- 

 toothed. Corolla irregular, 2-lipped: upper lip obtuse or emarginate. lower 

 lip 3-toothed. Stamens 4, didynamous. Capsule flat, oblique, 2-4-seeded. 



M. americanum Mx. Cow-Wheat. Puberulent; stem (i-18 inches high, ob- 

 scurely 4-sided; leaves short-petioled, the floral ovate or lanceolate, with a 

 few bristle-pointed teeth near the base: calyx-teeth subulate; corolla thrice 

 the length of the calyx, lower lip yellow. Dry woods; May-August; reported 

 from Lee county. 



OROBANCHACEAR ]/,mV. Broom-rape Family. 



Herbs, destitute of green foliage, with parasitic roots, alternate scales 

 in place of leaves, and solitary or spicate flowers. Calyx 4-5-cleft or 4- 

 5-toothed, persistent, free from the ovary. Corolla irregular, tubular, 2- 

 lipped, withering-persistent. Stamens 4, didynamous, inr-erted on the 

 tube of the corolla; anthers. 2-celled. Ovary ovoid, 1-celled. with 2-4 

 parietal placentae. Capsule 2-valved, many-seeded. 



APHYLLON Mitchell. Brownish or whitish plants with perfect flowers. 

 Calyx of 5 regular teeth. Upper lip of the corolla 2-lobed; lower 3-lobed. 

 Capsule with 2 or 4 placentae. 



A. uniflorum Gray. Xt thai Broom-rape. Stem short, scaly, mostly subter- 

 ranean; flowers solitary, on bractless scapes which are 3-6 inches high, pur- 

 plish or yellowish; calyx-lobes subulate; corolla-lobes large, obovate. 

 Prairies or woods; May-June; infrequent; Johnson. Jefferson, and Decatur 

 counties; reported from Story and Lee counties. (Thaleaia . mh iflora (L.) Brit- 

 ton.) 



A. ludovicianum Gray. Stems 3-10 inches high, solitary or clustered: 

 glandular-pubescent, branched; flowers in a dense terminal spike; calyx 

 usually with 2 bracts at the base; calyx-lobes narrowly lanceolate: corolla 

 longer, slightly curved, upper lip but little if any 2-cleft; placentae appar- 

 ently 2. Dry soil; June-August; infrequent: Lyon county. (Orolmnclie Inde- 

 vicutnn Nutt.) 



