SCROPHULARIACK^. 267 PEDICULARIS. 



and all usually with but 3 neives. Tuft of flowers at top of the stem. Bracts 

 broader and shorter than the leaves, 5— 7-nerved, with about 3 teeth at the 

 eml, of a pale straw-color, tipped with purple. Flowers straw-colored, nearly 

 concealed by the bracts. Per. -P^'c Bartsia. 



21. SCHWA'LBEA. 

 Calyx tubular, inflated, ohliqutly 4 cleft, upper division 

 small, lower division large, emarginate or 2-tootliC(l ; corolla 

 riiiijent, upper lip entire, arched, lower 3-lobed ; seeds many, 

 chatry. 



Named in honor of Schwalbe, a German botanist. Herbs with alternate 

 leaves. Fls. in a terminal laceme. Caps, ovate, compressed, 2-celled, 2- 

 valved, with a double partition. Seeds linear and winged. 



S. America'na. 



Simple, pubescent; leaves lanceolate; flowers alternate, in a terminal 

 raceme. In sandy fields and barrens. Stem 2 feet hijih, downy, square and 

 simple. Leaves alternate, sessile, lanceolate, with a ciliated niarjrin. Bracts 

 ovale, acuminate. Flower stalks simple, alternate. Corolla dull purple or 

 brownish yellow. June. Per. Cloif-seed. 



22. PEDICUL A'RIS. 

 Calyx vcntricose, 2 — 5 cleft, the segments leafy, or some- 

 times obliquely truncate ; corolla vaulted, upper lip compress- 

 ed, emarginate ; lower lip spreading, 3-lobed ; capsule 2 celled, 

 oblique, mucronate ; seeds angular. 



Lat. pediculus, a louse ; probably from its efficacy in destroying that insect. 

 Herbs. Lvs. opoosite or alternate, often pinnalifid. Cal. seg. unequal, 

 jagged. Cor. lower lip dilated, flat, in 3, deep seg. of which the middle one 

 is narrowest. Caps, depressed, dissepiment contrary. 



1. P. Canadensis. 



Stem simple ; spike somewhat leafy ; galea of the corolla with 2 setaceous 

 teeth; ca/yx truncated downwards ; cf//j5«/e acuminate. Grows in pastures 

 and low grounds. Stem erect, a foot high. Leaves lanceolate, pinnalifid 

 with crenate or dentate lobes, dark green. Spike short, terminal, hairy, with 

 a few small leaves at the base. The flowers are nearly sessile. Calyx 

 truncated in an oblique direction downwards. Corolla yellowish and purple ; 

 the upper lip is long, erect, forming a galea or helmet cut square off' at the 

 end, with a brisile-like tooth at each corner. Capsule prolonged into a lanceo- 

 late i)oiut A inch long. May— July. Per. Cnnudian Loiiscwort. 



(i. gludliita (P. gladiata Mx.); capsule prolongated into an ensiform point 

 which is 5 — 1 inch in length. Plant rather taller. 



2. P. PA'lLIDA. p. P. lanceolate. Mx. 

 Stem branching, smooth ; hares subopposite, lanceolate, crenate and dentate ; 



upper lip of the curoUa truncate, with roundish-ovate, .^oliaceous. dentate 

 segments; calyx 2-cleft. A smaller species than the foregoing, found in 

 alluvial woods, itc. Stem 1 — 2 feet in hight, smooth, with pubescent lines, 

 nearly opposite leaves and a few axillary branches. Leaves about an inch 

 wide and 3 or 4 times as long. Spikes terminal, 1 — 2 inches in length, with 

 ovate-lanceolate bracts. Calyx and corolla smooth, the latter greenish yellow, 

 an inch m length, with the galea somewhat emarginate at the end. Capsule 

 short, broadly ovoid. Sept, Per. Pale LousticorU 



