30 UNITED STATES AND MEXICAN BOUNDARY. 
central spines are present in young plants, next 1-3 appear, and well developed flower-bearing 
plants have always 5; the upper darker and shorter ones are about 6 lines, the lower ones 
9-12 or even 15 lines long; the lowest one is the longest and regularly deflexed, so that the 
plant seen from above shows as many rays, formed by these spines, as there are ribs. Spines 
mostly white, the lower lateral and central ones often tipped with purple, upper central ones 
entirely purple ; a specimen has been sent with all the spines almost entirely white. Flowers 
yellowish-green, always low down on the plant, (usually below the middle, often in the lower 
third) forming a circle around the stem ; flowers an inch long, funnel-shaped, not fully opening 
even in bright sunshine. Mr. Wright, to whose careful examinations and full notes I am in- 
debted for many data, found the stamina about 400 in number, and half as long as the petals ; 
stigmata green, much exsert. Fruit half an inch or less in thickness, crowned with the conic 
remains of the flower ; seed 0.5 or 0.6 line in diameter, orbicular, compressed and carinate ; tuber- 
cles confluent, so as to form pits; hilum linear-oblong or oval, basilar. Name from the color 
of the flowers. 
3. C. Dasyacantuus, E. in Wisl. Rep.: ovatus seu subcylindricus, simplex seu e basi parce 
ramosus, subcespitosus; costis 15-21 rectis seu obliquis subinterruptis ; areolis confertis 
ovatis ; aculeis 20-30 rectis rigidis patulis stellatim undique porrectis intertextis cinereis apice 
seepe rubellis vel adustis, in plantis debilioribus albidis, exterioribus 16-24 quorum laterales 
longiores, superiores breves graciles, inferiores intermedii, interioribus 3-8 robustioribus; 
floribus sub vertice ipso subterminalibus magnis flavis ; ovarii pulvillis 35-45 villosis aculeolos 
15-18 albidos seu apice rubellos gerentibus ; sepalis tubi late campanulati inferioribus 20-30 
aculeoliferis, superioribus 15-20 petaloideis oblanceolatis acutis seu cuspidatis ; petalis 15-25 
spathulato-oblanceolatis mucronatis seu interioribus plerumque obtusis muticis; staminibus 
numerosissimis ; stylo exserto subclavato ; stigmatibus 13-18 viridibus erectis ; bacca magna 
subglobosa aculeolata ; seminibus subglobosis tuberculatis, (Tab. XXXIX, XL, et XLI, fig. 1.) 
About Ei Paso, and down to the cafion of the Rio Grande ; common on rocky hills and the 
edge of gravelly table-lands, where Dr. Wislizenus first found it in 1846, and where the gentle- 
men connected with the Boundary Commission have since abundantly collected it in flower and 
fruit, and in numerous living specimens.—The geographical range of this species seems quite 
limited, as it has not been sent-from any other locality but the one indicated. Fl. in April and 
May ; fr. ripe in June.—Stems 5-12 inches high, 2 or 3 or even 4 inches in diameter, densely 
covered by the innumerable ashy-grey or reddish spines ; lower lateral spines somewhat bulbous 
and compressed at base, 6-7 lines long, upper ones 3-4 lines, and lower ones about 5 lines 
upper central spines shorter than the lower ones, these are the stoutest and of about the length 
of the lower external spines, or a little longer. Flowers large and numerous, from the upper 
axille of the past year’s growth, before the growth of the same spring is much advanced, so 
that they appear terminal or central at first glance, as they cover the top of the plant; this is 
the case with many spring-flowering Lchinocerei ; others, (e, g. the last mentioned species,) pro- 
duce their flowers lower down on the plant from older axillex. Flower 3 inches or 
Jength, and of the same diameter, very showy, 
long ; 
more in 
externally greenish yellow, with the centre of 
sepals red; petals bright yellow; stamens counted by Mr. Wright, over 1700, with yellowish 
green filaments ; pistil stout ; stigmata thick,erect. Flower (like those of most Fichinocerei) open 
in bright sunshine only, about the middle of the day, closing in the afternoon, but reopening 
the next, or even the third day, unless the weather be very hot, when all the functions of the 
z ost 
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