400 XCI. SCROPHULARIACE.E. 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 inflorescence. 



C. VERNA. Nutt. Venial Collinsia. Tall Pink. 



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

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

 linear, entire ; verticillasters 2 6-flowered ; pedicels many times longer than 

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

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

 base. Leaves 12' By 1', dilated at base. Pedicels 1 !' long. Corolla 

 5" long, variegated with blue and white. 



8. CHELONE. 

 Gr. %E\<>)vri, 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 Pcntstemon 

 chiefly by the seeds. 



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



Smooth ; Ivs. opposite, oblong-lanceolate, acuminate, serrate ; fts. 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. 



/?. purpurea. (C. purpurea. MM?) 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, irevrc, O-TJJ//OJ/, five stamens (4 perfect and 1 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. ^ rarely h, of N. America, branching, pa- 

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



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



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

 late-oblong or lance-ovate, serrulate, sessile ; panicle loose ; cor. lube 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. lasvigatus. Soland.) . Lvs. dilated and subamplexicaul, glabrous. 



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

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



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

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

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

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

 did, 3f high. Leaves 6' 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. 



