400 XCI. SCROPHULARIACE^. Pentstemon. 



declinate style and stamens ; capsule ovoid or globose, with 2 mem- 

 branaceous, bifid valves ; seeds large, concavo-convex. — ® with oppo- 

 site or verticillate Ivs., axillary and terminal infiorescence. 



C. VERNA. Nutt. Vernal Collinsia. Tall Piyik. 



Minutely puberulent ; Imoest Ivs. ovate or oblong, petiolate, middle and 

 upper sessile, ovate-lanceolate, cordate-amplexicaul, dentate, floral ones lance- 

 linear, entire ; verticillasters 2 — G-flowered ; pedicels many times longer than 

 the flowers. — Banks of streams, shaded or open, N. Y. near Utica, Gray, to 

 Ohio, Locke! la.., Plnviiner ! A tender herb, 8 — 18' high, branched from the 

 base. Leaves 1—2' by ^ — 1', dilated at base. Pedicels 1 — 1^' long. Corolla 

 5" long, variegated with blue and white. 



8. CHELONE. 



G?', yeXoivri, a tortoise ; from a fancied resemblance of the flower to the head of that animal. 



Calyx deeply 5-parted, with three bracts at base ; corolla inflated, 

 bilabiate, the fifth filament abortive, smooth above, shorter than the 

 rest ; anthers woolly ; caps, valves entire ; seeds broadly membrana- 

 ceous, winged. — % with opposite Ivs., distinguished from JPentstemon 

 chiefly by the seeds. 



C. GLABRA. Snake-head. Salt-rheum Weed. 



Smooth ; Ivs. opposite, oblong-lanceolate, acuminate, serrate ; Jls. densely 

 spiked. — A plant of brooks and wet places (Can. and U. S.), with flowers 

 shaped much like the head of a snake, the mouth open and tongue extended. 

 Stem mostly simple, 2f high, erect. Leaves opposite, of a dark and shining 

 green above, with irregular serratures, and sessile or nearly so. Flowers large, 

 in a short, terminal, dense spike. Corolla white, often tinged with red, inflated, 

 contracted at the mouth, with short, gaping lips. Filaments hairy. Style 

 long, exsert, bending downwards. Aug. Sept. 



/3. purpurea. (C. purpurea. Mill?) Lvs. distinctly petiolate, acuminate; 

 cor. rose-purple. — This variety prevails in the Western States ! It is larger in 

 its leaves and flowers. Petioles ^ — 1' long. Flowers very beautiful. 



9. PENTSTEMON. 



Gr. TcevTS, <rTT]fiov, five stamens (4 perfect and l abortive) ; from the character of the flower. 



Calyx deeply 5-cleft; corolla ventricose, bilabiate; the fifth filament 

 sterile, bearded, longer than the rest ; anthers smooth ; seeds 00, 

 angular, not margined. — % rardy ^, of N. America., branching, pa- 

 niculate. Lvs. opposite. Fls. showy, red, violet, blue or white. 



1. P. PUBESCENS. Soland. (Chelone Pentstemon. Linn.) Beard-tongue. 



Hirsute or glabrous ; radical lvs. ovate or oblong, petiolate, cauline lanceo- 

 late-oblong or lance-ovate, serrulate, sessile ; panicle loose ; cor. tube dilated up- 

 wards, upper lip shortest; sterile sta. longitudinally bearded. — River banks, 

 bluffs, hills and barrens. Western N. Y. ! to Ohio ! la. and 111. A handsome 

 plant, 1— 2f high. Stem round, smooth below, supporting a loose, oppositely 

 branched panicle of bluish-purple flowers. Corolla 1' in length, the barren fila- 

 ment broadest at end. June. 



a. Lvs. narrow and thinly pubescent. 



p. (P. Igevigatus. Soland.) Lvs. dilated and subamplexicaul, glabrous. 



2. P. DIGITALIS, Nutt, (Chelone digitalis. Sweet.) Fox-glove Peutstemini. 

 Very glabrous or rarely puberulent ; radical lvs. petiolate, oval-elliptic or 



oblong, cauline lanceolate, dilated and amplexicaul at base, serrate or 'rarely 

 entire ; panicle loose ; fed. erect, spreading ; cor. tube campanulate-dilated up- 

 wards, upper lip scarcely shorter than the lower; sterile sta. longitudinally 

 bearded.— Rich soils, Ohio, la. ! to Tenn., Miss Carpenter! Large and splen- 

 did, 3f high. Leaves 6i' by 2', broadest at base and tapering to a long point. 

 Flowers numerous. Corolla 15" long, bluish-purple, varying to white. Jn. Jl.— 

 I am strongly inclined to regard this also as a luxuriant variety of P. pubescens. 



