322 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
indicated, counties from which specimens have been seen are stated. 
Under Chionophila, a monotypic genus, no specimens are cited, but 
for a plant so local it is of interest to know the peaks upon which it 
occurs. For these genera the numbers of my own collections are 
given. Under Penstemon, a genus of many species and these much 
confused, it has been thought best fully to cite localities and speci- 
mens seen, the latter one to a county. All care has been taken to 
attribute localities to their proper county, but in this there is neces- 
sarily some possibility of error. The county is used as a logical, 
easily located unit of area. The name of each county is followed 
by acolon, and throughout county names are in alphabetical sequence. 
SYSTEMATIC TREATMENT. 
VERBASCUM L. 
KEY TO THE SPECIES. 
Leaves green, dentate, glabrous, not decurrent; stem (above) and calyx with simple 
glandular hairs; inflorescence lax; pedicels 10 to 15 mm. long; sepals lanceolate, 
5 to 6 mm. long, much shorter than the capsule; corolla 25 to 30 mm. wide, yel- 
low or white; filaments all densely lanose with knobbed purple hairs; capsule 
7 to 8 mm. long, glandular-puberulent; seeds dark gray, 0.8 to 0.9 mm, long. 
1. V. blattaria. 
Leaves yellowish green, finely crenate, decurrent; stem, leaves, and calyx densely 
woolly with stellate-branched nonglandular hairs; inflorescence densely 
crowded; pedicels very short or none; sepals ovate, 6 to 8 mm. long, slightly 
shorter than or equaling the capsule; corolla 20 to 22 mm. wide, always yel- 
low; 3 posterior filaments lanose with filiform yellow hairs, the 2 anterior 
ones glabrous; capsule 6 to 8 mm. long, stellate-pubescent; seeds brownish 
gray, 0.4 to 0.5 mm. long...........22-. 2-2 eee eee eee eee eee eee 2. V. thapsus. 
1. Verbascum blattaria L. 
Fields and roadsides; rare (Boulder, Colorado, Osterhout 2462). Introduced from 
Europe. 
2. Verbascum thapsus L. 
Fields and roadsides; frequent (Pennell 5958, 6116). Introduced from Europe. 
LINARIA L., 
KEY TO THE SPECIES. 
Corolla (excluding spur) 15 to 18 mm. long, yellow, the posterior lip arched over the 
anterior one, the anterior lip forming a conspicuous protruding orange palate, 
the spur tapering from a broad stout base; capsule 10 mm. long, much ex- 
ceeding the sepals; style 8 mm. long; seeds 1.7 mm. long, flattened circu- 
larly and broadly winged; stem 30 to 100 cm. tall, densely leafy; young stems 
NOt prostrate... 2.2... eee cece eens eee e eee e eee eee n ee cencees 1. L. linaria. 
Corolla (excluding spur) 14 to 17 mm. long, blue, the posterior lip erect, the anterior 
one broadly spreading but not forming a raised palate, the spur very slender 
throughout; capsule 2 to 3 mm. long, equaling or slightly exceeding the 
sepals; style 1 to 1.5 mm. long; seeds 0.3 to 0.4 mm. long, cylindric, obtusely 
prismatic-angled, not winged; stem slender, 20 to 80 cm. tall, less leafy 
young stems prostrate. .........---eeee sense eee pee ce eeceeeeees 2. L. texana. 
