286 SCBOPHULAEIACE^. (PIGWOKT FAMILY.) 



7. PENTSTEMON, Mitchell. Beakd-tongue. Pentstemon. 



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

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

 declined at the base, ascending abore ; 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 

 nevre,Jive, and frnjfuav, stamen; the fifth stamen being present and conspicu- 

 ous, although sterile.) 



* Sierih JUammt bearded down one side : flowers in a loose panicle, somewhat clam- 

 my, white or whitish ; peduncles slender. 



1. P. pubescens, Solander. More or less pubescent (l°-3°high); 

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

 2'lipped, gradually widened upwards, flattened and one-ridged on the uj^per side, 

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

 tlian-the upper. — Varies greatly in the foliage, sometimes nearly glabrous, 

 when it is P. Itevigatus, 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 entu'e ; corolla slightly 2-lipped, 

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

 groimd, Kentucky and southward. — Mowers larger than in the last, showy. 



# * Sterile fllament necerly smooth : flowers purple, racemose. 



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

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

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

 panicle ; corolla oblong-bell-shaped, almost regular. — Prairies, W. 'WiBconsiu ? 

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



8. MIMULiUS, 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 iiifii>, an ape, on account of the gaping corolla.) 

 * Erect, glabrous : leaves Jiather-veined : corolla violet-purple. 



1. M. ringens, L. Stem square (l°-2° high) ; leaves oblong or lanceolate, 

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

 flower; calyx-teeth taper-pointed. H. — Wet places; common. July -Sept. 

 — Flower 1'- 1^' long. 



•2. M. alatUS, Ait. Stem somewhat winged at the angles; leaves oblong- 

 ovate, tapering into a petiole ; peduncles shorter than the calyx. Which has very 

 short and abruptly pointed teeth : otherwise like the last. — Low grounds, Con- 

 necticut to Blinois, and southward. 



