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SYNOPSIS OF THE FLORA OF COLORADO. 47 
LOASACE®. 
MENTZELIA NuDA, T. & G. Rough with a minute, barbed pubes- 
cence; stems 1°-3° high, whi rite, ofa widely branching; leaves lan- 
ceolate.or oblong- ap age sessile, toothed or pinnatifid, with sharp or 
obtuse spreading eeth, very ro ugh ; flowers large, terminating the 
branches, respertine tireutedlate: (not bracteolate, T. & G.); petz us 10, 
lanceolate, t ae at the base, acute, yellowish-white with penta 1 
irker , 1’ to 14’ long; stamens very numerous, the exterior 
ments sidenhend and often sterile, the others filifor m, capsule-cylindrica iL 
lV’ or more long, 4” wide, 3-valved at the summit; seeds bene ge OVOIK d, 
with a broad, membranous wing.—Hall_& Harbour, 5 069; Dr. Smith ; 
Smith. On the plains near ‘Denver‘and ea shies Porter. 
swe. 
Cation City, Biter stah Plains of the Platte, Cor 
NTZELIA ALBICAULIS, Dougl. Stem 6/-18/ hak usually branch- 
ing from the base, white and ih gti and nearly glabrous below, rather 
weak ; leaves lanceolate, remote, e or less deeply pinnatifid, some- 
‘aie repand or nearly entire, Nalnene: sessile; flowers solitary or some- 
what clustered, not bracteolate; pet tals obovate, 2 2” long, light- yellow, 
scarcely exceeding the short, subulate-lanceolate calyx-segments; fila. 
ments 15-30, subulate- filiform or oceasionally wha tieea dilated; capsules 
cylindric, narrow, elongated, attenuate at base, 6” to 9” long fy. 2 
wide, minutely hispid; seeds 20-40.—Hall & Harbour, en ar 
Denver, Canby. Caton City, a egee. Plains of the Platte, Coulter. 
Frequent on the plains and among the foot-hi 
MENTZELIA MULTIFLORA, Nut t. Pl. Gamb. in Jour. Proc. Acad. 
Phil. Feb, 1848, under foe Stems scabrous, ag, ithe #O-1° 
high, slender, corymbosel y branched above, rough, pubescent or becom- 
late, Serene te ied attenuate below and sessile; flowers rome kane: 
b ate or linear, entire bracts 5 petals 10, deep_or 
low, able one val, obtuse or acute sh a8 long a ruptly poin nied, 
long, about 6/8” Jon ng, 3/4” wide, a little lo onger than the cans "X- 
ségments; ste eds in a dov ible e series, winged.—Hall & Harbour, 57 70; 
Canby. We t Moantaia Valley, Brandegee. 
MENTZELIA OLIGOSPERMA, Nutt—Wet Mountain Valley, Brandegee. 
MENTZELIA WRIGHTH, Gr. Pl. Fendl., p.48. Annual, rough-seabrous; 
Stems simple or paniculate, 2° high; leav es oblong- lanceolate, coarsely 
sinuate-dentate, lowest attenuate into a petiole, upper ones truncate at 
base or somewhat broadly Rar deegevay closely sessile ; iain 1-2, 
linear, entire, equaling the 
lan needlite-s eats searely surpassing t the lobes of the calyx, :, oem 
than the cylindrical o ; filaments all linear-subulate, outer ones a 
pig dilated; ; placentz ‘3. gic seeded; seeds winged.—Purgatory River, 
Bell. 
CACTACEE. 
MAMILLarta! NUTTALL , Eng., var. C22SPITOSA, Eng. Syn. Proc. Am. 
Ac., v. 3, p.9. Czespitose ; sauialepines 12-15, setaceous, straight, puberu- 
len ent, white, central one often wauting; fimbriate sepals and yellow pe- 
‘MAMILLARIA, Haw. Sepals and petals united beyond ery naked iets into a shot. 
tube. Berry juicy, oval or club-shaped. Seeds brown or black; em 
covered W 
s, wally ut as wide as Jong es sunshine 0} 
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