Foti] NELSON—IDAHO PLANTS 273 
lent, narrowly linear, tapering to both ends, 3-6 cm. long, all 
sessile except the lowest which are somewhat reduced in size and 
short-petioled, the upper passing into the bracts which are gradually 
reduced upward: the cymose panicle ample, 1-2 dm. long, or often 
longer, the open, lower branchlets more or less elongated and bear- 
ing simple or compound cymes, puberulent as are also the pedicels 
~ which are often much longer than the calyx and with a small pair 
of bractlets: sepals broadly ovate-lanceolate, acute, green and 
glabrate with subscarious margin, 5-6 mm. long: corolla showy, 
bluish-purple, gradually dilated, moderately bilabiate, glabrous 
within and without, its tube 14-16 mm. long, its oval-oblong lobes 
spreading, about 5 mm. long: anthers saccate, opening only above 
the middle, glabrous even on the line of dehiscence, sterile filament 
flattened at apex, wholly glabrous. 
This beautiful Pentstemon seems not to be closely related to any de- 
scribed species except P. gracilenta Gray, from which it is readily distinguished. 
That has glabrous herbage and is glandular pubescent in the inflorescence. 
Its leaves are broader and largely basal, upwardly becoming distant and 
reduced; the relatively smaller and narrower inflorescence is naked-peduncu- 
late; and the corolla is smaller and the sterile filament more or less bearded. 
I take pleasure in naming this for my young friend J. FRANCIS MACBRIDE, 
who collected so industriously during the summer of 1910. The type is no 
105, secured on loamy slopes, near Big Willow, Canyon Co., Idaho, May 27. 
Pentstemon perpulcher, n. sp.—Stems few-several from a short 
thick woody caudex, 4-8dm. high including the inflorescence, 
erect or ascending, puberulent below, becoming glabrous above: 
basal leaves narrowly oblanceolate, 3-10 cm. long. including the 
tapering base and petiole; cauline linear-lanceolate, with sessile 
clasping base, reduced upward and passing into the linear bracts: 
thyrsus crowded or more open, rather narrow and secund, 1-3 dm. 
long: sepals glabrous, ovate, acute with subscarious and minutely 
€rose margins: corolla blue, mostly less than 20 mm. long, with 
moderately dilated glal throat and oval lobes: anthers dehiscent, 
glabrous; sterile filament stiffly bearded at the tip, not at all 
dilated. 
I hesitate to designate another species in the P. glaber group. Several 
Segregates have already been published by various authors, none of which, 
however, seems to have anything to do with the specimens in hand. The 
