Pentstemon. SCROPHULARIACE^. 35 



6. PENTSTEMON. L'Herit.; Sdireb. gen. pi. 1758; Endl. gen. 3909. pentstemon. 

 [ From the Greek, pcnlc, five, and siemon, a stamen ; the Cflh or abortive stamen being large] 



Calyx deeply 5-partcd, or of 5 sepals. Corolla 2-lipped, ventricose. The fifth or sterile 

 filament longer than the fertile, and bearded on the upper side. Anthers smooth. Capsule 

 2-celled, 2-valved. Seeds angular. — Perennial or rarely sulTruticose herbs, with opposite 

 leaves and paniculate (mostly purplish) flowers. 



1. Pentstemon pubescens, Willd. Pubescent Pentstemon. 



Stem pubescent; leaves lanceolale-oblong, repandly serrulate or serrate, sessile and clasping; 

 sterile filament bearded from the summit to below the middle. — Willd. sp. 3. p. 227 ; Michx. 

 fl. 2. p. 21 ; Pursh, fi. 2. p. 428 ; Nutt. gen. 2. p. 52 ; Ell. sk. 2. p. 129 ; Bart. fl. N. Am. 

 t. 103 ; Beck, hot. p. 266 ; Darlingt. fl. Cest. p. 369 ; Hook. fl. Bor.-Am. 2. p. 97. 



Stem 12- 15 inches high, obtusely quadrangular, simple or branching from the base. 

 Leaves nearly smooth, 2-5 inches long and 4-6 lines wide : radical ones longer and at- 

 tenuated at the base, often nearly entire ; those of the stem sessile , the uppermost broader. 

 Flowers in a loose trichotomous panicle. Sepals ovate-lanceolate, acuminate, pubescent. 

 Corolla about an inch long, pubescent, tapering below : upper lip 2-lobed, compressed ; lower 

 3-cleft, plaited, hairy inside. Stamens smooth : anther-lobes divaricate : sterile filament 

 without an anther, beautifully plumose. Style about the length of the stamens : stigma small. 

 Capsule ovoid, smooth. 



Hills and borders of woods ; north and west of Catskill. June - July. 



Tribe IV. GRATIOLEjE. Bentk 



Corolla nearly equal, or 2-lipped ; the lobes flattish. Fertile stamens 2 or 4 : anthers 2- 

 celled, pointless. Capsule 2-celled ; the dissepiment placentiferous, at length free. 

 Seeds wingless. 



7. MIMULUS. Linn. ; Endl. gen. 3935. -- MONKEY-FLOWER. 



[ So named from the Greek, mi7no, a monkey ; in allusion to its grinning flowers.] 



Calyx tubular, prismatic, 5-toothed. Corolla ringent ; the upper lip reflexed at the sides : 

 lower lip 3-cleft, with the palate prominent. Stigma thick, 2cleft. Capsule 2-celled, 

 many-seeded. Seeds minute. — Perennial or annual herbaceous plants, with quadrangular 

 stems and opposite leaves. Flowers axillary and solitary, witliout bracts, mostly violet or 

 yellow. 



