328 scrophulariacejE. (figwokt family.) 



usually as long as the others, either naked or bearded. Seeds numerous, wing- 

 less. — Perennials, branched from the base, simple above, with opposite leaves, 

 the upper sessile and mostly clasping. Flowers mostly showy, thyrsoid or ra* 

 cemose-panicled. (Name from irevre^five, and ot^/zcoj/, stamen ; the fifth stamen 

 being present and conspicuous, although sterile.) 



* Sterile filament bearded down one side : flowers numerous in a loose and somewhat 



clammy panicle, white or purplish. 



1. P. pub^SCens, Solander. More or less pubescent (1° - 3° high) ; stem- 

 leaves lanceolate from a clasping base, serrate or sometimes entire; corolla 2 

 lipped, gradually widened upwards, somewhat flattened and one-ridged on the upper 

 6ide, and with 2 infolded lines on the lower which are bearded inside ; the throat 

 almost closed ; lower lip rather longer than the upper; sterile filament densely 

 yellow-bearded. —Varies greatly in the foliage, sometimes nearly glabrous, when 

 it is P. larvigatus, Solander, &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 abruptly inflated and 

 almost bell-shaped from a narrow base, beardless, with the throat widely open, the 

 spreading lobes nearly equal ; sterile filament sparingly bearded. (Flowers more 

 showy than in the preceding, mostly white, over l'long). — Rich soil, Alexan- 

 dria, Virginia {A. H. Curtiss), to Illinois, and southward. June -Aug. 



* * Sterile filament nearly beardless, dilated and hooked at the end {rarely wanting). 



3. P. grandiflbrus, Fraser. Very smooth and glaucous ; stems simple 

 (l°-3° high); leaves thickish, 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, bluish or lilac-purple. — 

 Prairies, W. Wisconsin (Falls of St. Anthony, Lapham), and westward. June. 



8. MIMULUS, 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 and 

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

 * Erect from a perennial root, glabrous : leaves feather-veined : corolla violet-purple. 



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

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

 flower ; calyx-teeth taper-pointed, nearly equal. — Wet places : common. July - 

 Sept. — Flower 1' - 1^' long, rarely white. 



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 abruptly pointed teeth : otherwise like the last. — Low grounds, Connecti- 

 cut to Illinois, and southward. 



* * Diffusely spreading : leaves several-nerved and veiny : corolla yellow. 



3. M. Jam^sii, Torr. Smooth or smoothish ; stems creeping at the base ; 

 stem-leaves roundish or kidney-shaped, nearly sessile, equalling the peduncles ; 



