286 SCROPHULARIACE^E. (FIGWOUT FAMIL7.) 



7. PENTSTEUION, Mitchell. BEARD-TONGUE. PKNTSTEMON. 



Calyx 5-partcd. Corolla tubular and more or less inflated, either decidedly 

 or slightly 2-lippcd ; the upper lip 2-lobed, and the lower 3-eleft. Stamens 4, 

 declined at the base, ascending above ; and a fifth sterile filament usually as 

 long as the others, either naked or bearded. Seeds numerous, wingless. Pe- 

 rennials, branched from the base, simple above, with opposite leaves, the upper 

 sessile and mostly clasping. Flowers showy, thyrsoid-panicled. (Name from 

 7revre,flve, and OTJ^/KBI/, stamen; the fifth stamen being present and conspicu- 

 ous, although sterile.) 



* Sterile filament bearded doivn one side : flowers in a loose panicle, somewhat clam- 

 my, white or bluish; jtcdiutclcs s/tml.r. 



1. P. pllbescens, Solandcr. More or less pubescent (l-3 high) ; 

 stem-leaves lanceolate from a clasping base, serrate or sometimes entire ; corolla 

 2-lippcd, gradually widened upwards, flattened and one-ridged on the upper side, 

 and with 2 infolded lines on the lower which are bearded inside ; lower lip longer 

 than the upper. Varies greatly in the foliage, sometimes nearly glabrous, 

 when it is P. laivigiitus, Soland., &c. Dry banks, Connecticut to Wisconsin, 

 and southward. June - Sept. 



2. P. Digitalis, Nutt. Nearly glabrous (2 -4 high); stem-leaves ob- 

 long- or ovate-lanceolate, clasping, serrulate or entire ; corolla slit/hilt/ 2-lippt-d, 

 abruptly inflated and almost bell-shaped from a narrow base, beardless. Moist 

 ground, Illinois and southward. Flowers larger than in the last, showy. 



# # Sterile fllament nearly smooth : flowei's purple, racemose. 



3. P. graildiflorilS, Fraser. Very smooth and glaucous; stems sim- 

 ple (1- 3 high) ; leaves thick, ovate or rounded, the upper clasping; flowers 

 (showy, 2' long) on short pedicels, in a long and narrow raceme rather than 

 panicle ; corolla oblong-bell-shaped, almost regular. Prairies, W. Wisconsin? 

 (Falls of St. Anthony, Lapham. Dubuque, Iowa, Dr. Ilor.) 



8. iniMTILiUS, L. MONKEY-FLOWER. 



Calyx prismatic, 5-angled, 5-toothed, the upper tooth largest. Corolla tubu- 

 lar; the upper lip erect or reflexed-spreading, 2-lobed ; the lower spreading, 

 3-lobed. Stamens 4. Stigma 2-lipped, the lips ovate. Seeds numerous. 

 Herbs, with opposite leaves, and mostly handsome flowers on solitary axillary 

 peduncles. (Name from /u/xo>, an ape, on account of the gaping corolla.) 

 # Erect, glabrous : leaves feather-reined : corolla rioltt-/>nr/>le. 



1. HI. ringenS, L. Stem square (l-2 high) ; leaves obloncj or lanceolate, 

 pointed, clasping by a heart-shaped base, serrate; peduncles longer than the 

 flower ; calyx-teeth taper-pointed, ty Wet places ; common. July - Sept. 

 Flower l'-l^'long. 



'2. M. nlatUS, Ait. Stem somewhat winged at the angles; l<an-s oblong- 

 ovate, tapci-int/ into a .petiole ; peduncles shorter than the calyx, which has very 

 short and abruptly pointed teeth : otherwi>e like the last. Low grounds, Con- 

 necticut to Illinois, and southward. 



