CONTRIBUTIONS TO WESTERN BOTANY 43 
parma This plant is Pp skies Melam podioid but there is no 
cup-shaped area at tip of akene as in M. longicornn. 
Coreopsis diffusa aed sp. No. 27720, La Barranea, :Guada- 
lajara, Nov. 171950. A weakly branched and diffuse annual, 
3-4 inches long, with short internodes, and ovate, bipinnate leaves 
e 
=? 
Heads on filiform peduncles 1-2 pegs long and scattered among 
the base! hg aon ng radiate, at least with two series of akenes. 
Outer bracts few and short; the inner elliptical and 4-6 mm. long, 
then pradaally passing into ‘the few central ones which are linear, 
Unter row of akenes round, light-colored, smooth, se iacei roun- 
ded at both ends, and without pappus or markings. Inner akenes 
single or few, blac attened and with inner face concave, page 
and with narrow white wing lacerate, with no pappus, oblong, 
2 mm, long like the rest. This seems near Blake’s C. ioerepure 
but inner bracta narrower 
erezia kuhnioides n. sp. No. 27693, La Barranca, 
Guadalajara, Nov, 25 1930, Tall, strict and smooth and tufted 
herb, 3-4 ft. high, Leaves eared, oblong-lanceolate, 2-4 inches 
long, low- toothed, and rather re motely so, leathery and rigid. Cor- 
ymbosely branched above and very slender. Heads many, in cap- 
itate clusters of half a dozen heads which are 4 mm. long to the 
end of phan Scales about linear, pruinose and acate. Akenes 
linear, narrowed above into a distinct neck and with enlarged 
disk-like sia 10-ribbed. Pappus nearly white, 4-6 mm, long. co- 
pious, a little wae above, very fine, Flowers natant 10 toa _ 
Perezia nitens sp. No. 27798, Guadalajara Nov. 
1930), On prairies, 3. tft. high, stri , rather racemosely ae 
ing, + Denny pubescent haso shea oad heads or young parts de- 
usly floccose early. Leaves oblong-o Hinge sad acumi- 
ace finely and regularly acerose-serrate, veiny, many, appressed, 
a litte reduced above where subtending the inch- isee heads, Heals 
one to few in the axils and witha larger cluster at the tip, all in 
a linear spike a foot or more long. ‘Scales narrowly linear, all a 
cuminate and the outer ones long-acuminate and all aculeate at 5, 
Heads about 20-flowered, rather wide. Inner scales about] cm. 
long and twice as long as the rear and barely cag and densely 
pubescent akenes with stiff and ascending hairs. Stamen tube 
white and elongated. Corolla'tube tien. Upper side of 
leaves — suit belongs in the Wrightii group. 
otes on Perezi 
Doresis Wrightii eee Arizonica (Gray), P. oases Gr, 
It is evident that these two reputed species are not distin 
P, Wrightii seules are ovate to oblong, rounded but often apiulat 
and lacerate, the outer inclined to spread, thick, notstriate. A 
kenes scabrone, td ed, beaked, with broad and disk-like crown, 
Pappua nearly whit 
