268 SCROPHULARIACE^E. 



V. EUPHRASIEJE. 



17. SCHWALBEA. Linn. Schwalbea. 

 (In honor of Christian Schwalbe; a German botanist.) 



Calyx declined, very oblique, tubular, 10 12 -ribbed, 5- 

 toothed ; the upper tooth much smaller ; the 2 lower connate. 

 Corolla bilabiate ; upper lip oblong, obtuse, entire ; the lower 

 short, erect, with 3 very short obtuse lobes. Stamens didyna- 

 mous. Capsule ovoid-roundish, 2-celled, 2-valved. Seeds 

 numerous, winged. 



<S. Americana Linn. 



Pine barrens. N. Y. to Flor. and Louis. July, Aug. 1\.. Stems several 

 from the same root, 12 18 inches high, and with the rest of the plant some- 

 what viscid-pubescent. Leaves alternate, sometimes nearly opposite, lanceolate 

 or ovate-lanceolate, obscurely 3-nerved. Flowers in a terminal raceme, large, 

 dark purple ; upper lip villous. Found in the sandy plains near Alkiny, N. Y. 



American Schwalbea. 



18. RHINANTHTJS. Linn. Yellow Rattle. 



(From the Greek piv, a nose, and avtios, a. flower ; its ringent corolla resembling 

 the snout of an animal.) 



Calyx inflated, 4-toothed. Corolla ringent ; upper lip ovate, 

 obtuse, compressed laterally ; lower one of 3 nearly equal lobes. 

 Stamens inserted into the throat of the corolla. Capsule orbic- 

 ular, compressed, 2-celled. Seeds numerous, margined. 



R. minbr Ehrh : smooth or a little pubescent ; leaves varying from ob- 

 long to lanceolate, serrate ; calyx smooth ; upper lip of the corolla broad- 

 ovate. R. Critta-galli Linn. 



Meadows. Arct. Amer. Can. N. Y. and Mass. W. to Oregon. June, July. 

 (I). Stem 1 2 feet high, branching, sometimes not more than a few inches 

 high and simple. Leaves opposite, veiny, varying in width. Flowers axillary, 

 but somewhat spiked, yellow. When the fruit is ripe, the seeds rattle in the 

 husky capsule, whence its English name. Common Yellow Rattle. 



19. PEDICULARIS. Linn. Lousewort. 



(From the Latin pcdicuhis, a louse ; supposed to be because it produces the 

 lousy disease in sheep that feed upon it.) 



Calyx ventricose, unequally 5-toothed or 2-lipped ; upper lip 

 2-toothed or entire ; lower 3-toothed or sometimes obliquely 

 truncate. Corolla ringent; upper lip compressed, galeate v and 

 often rostrate, emarginate ; lower 3-lobed, the middle lobe 

 smaller. Capsule ovate or lanceolate, compressed, more or less 

 falcate or oblique, 2-celled, 2-valved, opening at the top. 



1. P. lanceolate, Mich. : stem erect, somewhat branched, smoothish ; leaves 

 subopposite, lanceolate, crenately incised, with the segments toothed-serrate, 



