309 
13. P. pubescens Solander. Stem 3 to 6 dm. high, viscid-pubescent (at least the 
inflorescence): leaves oblong to lanceolate, 5 to 10 cm. long, lowest and radical 
ovate or oblong, usually denticulate: thyrsus narrow: corolla dull violet or purple 
(or partly whitish), very moderately dilated, the throat nearly closed by a villous- ~ 
bearded palate: sterile filament densely bearded.—Extendivg from the Atlantic 
region into Texas. 
++ ++ Leaves all linear and entire, narrow at base: corolla funnelform: sterile filament 
wholly glabrous. 
14. P. stenophyllus Gray. Glabrous or obscurely puberulent, 6 to 9 dm. high: 
leaves 7.5 to 10 cm. long, and the larger only 4 mm. wide, attenuate-acute; upper- 
most and floral nearly filiform: corolla large (nearly 3.5 cm, long), purple or violet.— 
A species of southern Arizona and adjacent Mexico, but represented on the western 
borders of Texas by var. DASYPHYLLUS Gray (P. dasyphyllus Gray), a form with 
leaves and lower part of stem thickly beset with short retrorse pubescence. 
15. P. ambiguus Torr. Glabrous, 3 to6 dm. high, diffuse and often much branched: 
leaves filiform, or the lowest linear and floral linear-subulate: inflorescence loosely 
paniculate: corolla rose-color and flesh-color turning to white, with rotately 
expanded limb, throat or its lower side somewhat hairy, and tube 12 mm. or more 
long.—Reported from the ‘“Staked Plains.” 
7. MIMULUS L. (MONKEY-FLOWER.) 
Herbs, with opposite leaves, mostly handsome flowers on solitary 
axillary bractless peduncles, prismatic 5-angled 5-toothed calyx (upper 
tooth largest), tubular corolla with upper lip erect or reflex-spreading 
and 2-lobed and lower spreading and 3-lobed, 4 stamens, and 2-lobed 
stigma. 
* Erect from a perennial root, glabrous: leaves feather-veined: corolla violet-purple. 
1. M.ringens L. Stem square, 3 to 6 dm. high: leaves oblong or lanceolate, 
pointed, clasping by a heart-shaped base, serrate: peduncles longer than the flower: 
calyx-teeth taper-pointed, nearly equal: corolla personate.—Wet places, extending 
from the Atlantic States into Texas. 
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.—Wet places, same range as last. 
* * Leaves several-nerved and veiny, dentate, the upper sessile and ctasping : calyx oblique: 
corolla yellow, the lower lip bearded. 
3. M. glabratus HBK. Diffusely spreading, smooth and smoothish: stems creep- 
ing: leaves round-oval or ovate, mostly denticulate or dentate; lower with margined 
petioles, upper sessile by broad base: flowers mostly subtended by undiminished or 
little diminished leaves. (M. Jamesii, var. Texensis Gray.)—Southern and western 
Texas. From western Texas is also reported var. JAMESI Gray (M. Jamesii Torr. & 
Gray), with leaves mainly orbicular and almost entire, some approaching reniform, 
the upper ones hardly diminished and equaling the subtended peduncles. 
4. M. luteus L. Probably occurs in the mountains of extreme western Texas, 
and may be known from the preceding by its more erect habit, ovate to roundish or 
subcordate leaves, and deep yellow corolla with brown-purple dots or blotches. 
8. STEMODIA L, 
Herbaceous or slightly shrubby plants, with 5-parted calyx, more or 
less bilabiate corolla with cylindraceous tube, 4 stamens inserted be- 
