402 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Opuntia arizonica Grifliths, Rep. Mo, Bot. Gard. 20: 93. 1909,° 
Plants stout, more or less spreading, but in time becoming 1 to 1.5 meters 
high, forming broad clumps; old joints very large and thick; last year’s 
joints orbicular, often rounded at base, 15 to 25 cm, ip diameter, pale glaucous 
green; spines 2 to 5, generally 4 or 5, usually 4 to 6 cm, long, more or less 
spreading in all directions, stout and somewhat flattened, bright red at base, 
above whitish or tinged with rose; areoles often 4 to 6 em. apart; lower 
areoles naked or with a single spine; bristles caducous except along the mar- 
gins of the joints, here numerous and long; flowers large, nearly 40 cm. broad, 
at first lemon-yellow, hardly at all tinged with red at base, in age becoming 
salmon-colored; ovary somewhat elongated, slightly glaucous, 3.5 to 4 cm. 
long. 
Collected by J. N. Rose near Desert Laboratory, Tucson, Arizona, April, 1908 
(no, 11751). 
Common on foothills and low mountains in the general region of Tucson, 
This species was frequently collected by Professor Toumey under the name 
ot both O. engelmanni and O. lindheimeri. 
Opuntia toumeyi Rose, sp, nov. 
Plants low, widely spreading or prostrate; last year’s joints obovate, 15 to 20 
em. Jong, dull green, slightly gliucous; spines 1 to 4, generally 1 or 2, one 
usually very long and porrect, 4 to 6 cm. long, terete, light brown, the shorter 
spines often white and appressed ; lower areoles naked; young joints pale green, 
slightly glaucous, the young areoles crowning small tubercles; leaves G to 8 
mm, long, somewhat bronzed, acute; young areoles with a single rose-colored 
spine; bristles usually brownish; petals 8 cm. long, deep yellow, reddish, or 
bronzed at base; ovary oblong, 5 cm. long, glaucous, with oblong tubercles 
crowned by the areoles, these with brown bristles, but no spines. 
Type collected by J. N. Rose near Desert Laboratory, Tueson, Arizona, April, 
1908S (no, 11750). 
Type U. S. National Herbarium no, 454445. 
Opuntia blakeana Rose, sp. nov. PLATE LY. 
Plants low and widely spreading, the old branches trailing on the ground, 
rarely rising more than 40 to 60 cm, above the ground: joints obovate, small, 
1 to 1.5 em. long, thick, pale, more or less purplish about the areole; spines 
usually only 2 or 3 at each areole (the lower areoles often without any), short 
brownish; flowers vellow, more or less reddish in the center. 
Type collected by J. N. Rose near Desert Laboratory, Tucson, Arizona, April, 
1908 (no. 11753). 
Distribution southern Arizona. 
Type U. S. National Herbarium no, 454451. 
This species is named for Dr. W. P. Blake, of Tucson, Arizona. 
EXPLANATION OF PLATE LV.—-A pad. Natural size. 
“Still later, while the page proof of this paper was in hand, Dr. Griffiths’s 
publication of O. arizonica was received, which proved to be an anticipation of 
another of my species. TI accordingly here substitute Dr. Griffiths’s name, 
allowing, however, my description to stand as already in type. 
