116 
BOTANY. 
plains. Another simple form, but scarcely half as large, occurs in Colorado 
and possibly in Eastern Utah. 
Mamillaria Nuttallii, Eng. Smaller, globose, simple or sometimes 
cffispitose, with fewer (10-20) weaker ash-colored spines ; flowers yellow^, 
1-2' broad ; berries scarlet, subglobose ; seeds few, black, globose, pitted. — 
Common on the eastern slopes of the mountains of Colorado and perhaps to 
be found in Eastern Utah. 
EciiiNOCACTUS^ SiMPSONi, Eng. Simple, globose or depressed, with 
ovate tubercles like a Mamillaria, bearing about 20 outer ash-colored spines 
and 5-10 stouter darker inner ones, all straight and rigid ; flowers from 
the top of the just developing tubercles, small, 9-12" broad, yellowish-green 
to purplish ; scales on the ovary very few ; berry small, dry, with few black 
tuberculated seeds. — Butte and Kobe Valleys, Utah, (H. Engelmann;) fre- 
quent on the eastern slopes of the Rocky Mountains, Colorado ; flowering in 
April and May. [Found on the Havallah, Battle and Toyabe Mountains, and 
above Thousand Spring Valley, Nevada, only on high rocky ridges; 7-8,000 
f(3et altitude ; July, in flower. Heads 2-5' in diameter, often clustered, the 
fleshy interior frecpuiutly colored, s. w.] A small variety, resembhng forms 
of M. vivqmra in haljit, but the tubercles grooveless and fruiting at top, has 
,spiii,>s long, the inner scarcely different; a larger form has much larger 
tul)ercles and spines, often 12-14" long, the inner ones bright reddisli- 
brown. (433.) 
EcHiNOCACTUS Whipplei, Eng. & Big. Middle-sized, globose or oval, 
with 13 interrupted ribs; outer spines 7-11, mostly ivory-white, the lowest 
darkish, the ui)per much longer, flat and often curved ; central spines 4, the 
upper broader, longer, white, the others brown, the lowest hooked ; flowers 
greenish-red, with few (2-5) sepals on the ovary, 9-15" hmg, not quite so 
wide; seeds few, large, tuberculate.— Heads 3-5' high; spines 3-20" long. 
On the lower Colorado, (Bigelow, Newberry;) in Desert Valley, west of 
Sevier Lake, Utali, (H. Engelmann ;) the latter with more radial spines 
and often with more than one hooked. 
EcHiNOCACTUs POLYANCiSTEus, Eng. & Big. Mediuui-sizcd, oval, with 
' ECHIXOeACTrS, LiXK & Otto. Sojials an.I petals niiitea beyond the sopal-bearino- ovary into 
a short tulM>. r.r, , y globose m- oval, Jiiiey <.r dry. covered witl, scales and sometimes with wool Seeds 
brown m- black : usually curved over a small albumen ; cotyledons short, foliaceous, paralhd to 
'l;'' ' "' ■^'"'l''''- S''"*''-illy many-ribbed with bundles of spiues on 
the ribs rarely , no, , , iated ; llowers near the t..pjnst above and close to the spines of the same season 
usually large, as Avide as long, open only in sunshine. ' 
