MiMULUs. XCl. SCROPHULARIACEiE. 401 



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

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



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

 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. Pedimcles 3 — 7-flowered. Flow- 

 ers nodding, 9 — 10" long, pale blue. June. 



4. P. GRANDiFLORUs. Frascr. (Chelone grandiflora. Spr.) Great-fmcered 

 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, Riddell, Mo., Nuttall. Stem 3f high. 

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

 the mouth, variously shaded with blue and purple. 



5. P. sPECiosus. Doug. Shmvij 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; ccn-. tube enlarged upwards; sterile fil. filiform, glabrous. — Oregon. 

 Height 3 — 4f Flowers IJ' long, blue. •\ 



6. P. CAMPANULATUs. Willd. (Chcloue 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 ; 

 c(yr. 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. ScarUt Pentslcmon.— G:\2i\irovLS and glaucous; Ivs.en- 

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

 scarcely dilated upwards ; laiocr Up and sterile fil. densely bearded. — Mexico. 

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



06».— P. gentianoides, with the panicle long, leafy at base, flowers violet, scarlet, &c., and a few other 

 Bpeciea are rarely found in gardens. 



Tribe 5. GRATIOIiE.li:. 



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



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



10. MIM0LUS. 



Gr. fiifio), an ape ; from the resemblance of the ringent or grinning corolla. 



Calyx prismatic, 5-toothed ; corolla ringcnt, 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. Fed. axillary, solitary, 1 -flowered. 



1. M. RiNOENR. Monkey Flower. 



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

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

 with large, blue, ringent flowers. Stem erect, square, smooth, about 21 high. 

 Leaves sessile, opposite, ."^crrate, acute, lanceolate. Peduncles about as long as 

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

 angled and 5-toothed. Corolla pale ])luc, yellow within. Jl. Aug. 



2. M. Ai-ATr.s. Wiv2:-slcm Movkcy Flower. 



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

 flowers; St. winged at the 4 corners. — 1\. In N. Y. to la., Plummcr ! 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 win:;ed 

 al the 4 angles", affords an adcfjuate distinction. Leaves stalked, ovale. Flow- 

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

 3. M. LUTEUs. (M. rivularis, lyratus, variegatus and gultatus nf mUhars.) 



