MIMULUS. XC1. SCRQPHULARIACE^. 401 



3. P. GRACILIS. Nutt. (Chelone gracilis. Spreng.) Slender Beard-tongue. 

 Glabrous; radical Ivs. petiolate, elliptic-oblong or lance-oblong, cauline 



linear-lanceolate, amplexicaul, entire or remotely serrulate; panicle pubescent, 

 slender; ped. erect; cal. segments ovate-lanceolate, acuminate; cor. tube long 

 and narrow, scarcely dilated upwards, upper lip shorter than the lower ; sterile 

 sta. longitudinally bearded. River bottoms, near Chicago, 111., Mead, also Mo. 

 and C. W. Plant simple, glaucous, 2f high. Peduncles 3 7-flowered. Flow- 

 ers nodding, 910" long, pale blue. June. 



4. P. GRANDIFLORUS. Fraser. (Chelone grandiflora. Spr.) Great-flowered 

 Beard-tongue. Erect, glabrous and glaucous ; radical Ivs. petiolate, obo- 



vate-oblong, cauline broadly ovate, the highest orbicular, amplexicaul, not con- 

 nate ; panicle long, slender and racemose, interrupted ; ped. short, solitary or 

 fasciculate, rigid ; cor. broadly campanulate ; sterile fil. dilated and puberulent 

 at apex. 111. near Prairie du Chien, RiddeU, Mo., Nuttall. Stem 3f high. 

 Flowers 1 3 together in the upper axils. Corolla 15" long, much dilated at 

 the mouth, variously shaded with blue and purple. 



5. P. SPECIOSUS. Doug. Showy Pentstemon. Erect, glabrous, glaucous; radi- 

 cal Ivs. petiolate, oblong-spatulate, cauline sessile, lanceolate ; panicle elongated, 

 slender, virgate, secund; cal. segments ovate-oblong, acuminate, margin mem- 

 branaceous ; car. tube enlarged upwards ; 'sterile fil. filiform, glabrous. Oregon. 

 Height 3 4f. Flowers !' long, blue, f 



6. P. CAMPANULA-TUB. Willd. (Chelone campanulata, augustifolia, rosea, 

 atropurpurea, of authors.) Glabrous; Ivs. acutely serrate, lance-linear or lance- 

 ovate, long-acuminate, often dilated at base ; panicle long, loose and secund ; 

 cor. tube ventricose above, lobes subequal ; sterile fil. bearded. Mexico. A very 

 variable species, 2 3f high, with large flowers varying from light purple to 

 dark red or purple, t 



7. P. BARBATUS. Nutt. Scarlet Pentstemon. Glabrous and glaucous ; Ivs. en- 

 tire, lower oblong, upper lance-linear ; panicle long and loose ; cor. tube long, 

 scarcely dilated upwards ; lower lip and sterile fil. densely bearded. Mexico. 

 Height 2 3f. Corolla scarlet, 13" long, f 



Obs. P. gentiairoides, with the panicle long, leafy at base, flowers violet, scarlet, &c., and a few other 

 species are rarely found in gardens. 



TRIBE 5. GRAT1OL.EJE. 



Corolla tubular, not saccate or spurred. Capsule bivalved, rarely indehiscent. 



Calyx lobes or segm. imbricate in sest. Inflor. centripetal, uniform. Benth. 



10. MIMtJLUS. 



Gr. fit pa, an ape ; from the resemblance of the ringent or grinning corolla. 



Calyx prismatic, 5-toothed ; corolla ringent, the upper lip reflected 

 at the sides ; palate of the lower lip prominent ; capsule 2-celled, 

 many-seeded ; stigma thick, bifid. Herbs prostrate or erect, with square 

 stems and opposite Ivs. Ped. axillary, solitary, I -flowered. 



1. M. RINGENS. Monkey Flower. 



Las. sessile, smooth, lanceolate, acuminate ; ped. axillary, longer than the 

 flowers. Tj. A common inhabitant of ditches and mud soils, Can. and U. S., 

 with large, blue, ringent flowers. Stem erect, square, smooth, about 2f high. 

 Leaves sessile, opposite, serrate, acute, lanceolate. Peduncles about as long as 

 the leaves, square, curved upwards, axillary and opposite. Calyx tubular, 5- 

 angled and 5-toothed. Corolla pale blue, yellow within. Jl. Aug. 



2. M. ALATUS. Wing-stem Monkey Flower. 



Lvs. petiolate, smooth, ovate, acuminate ; ped. axillary, shorter than the 

 flowers; st. winged at the 4 corners. l\. In N. Y. to la., Plummer ! and S. 

 States. This, like the last species, inhabits ditches and other wet places, and 

 grows to nearly the same height. The square stem, erect, smooth and winged 

 at the 4 angles, affords an adequate distinction. Leaves stalked, ovate. Flow- 

 ers ringent, on short stalks, light purple. Calyx teeth rounded, mucronate. Aug. 

 3. M. LUTEUS. (M. rivularis, lyratus, variegatus and guttatus of authors.} 



