BOTANY. 13 
The specimens have thirteen compressed, interrupted ribs; the floriferous is contiguous to 
- the spiniferous areola, not separated from it by the cylindric glands present in several allied 
species. After flowering the floriferous areola forms a groove two-thirds down the upper side 
of the tubercle, (or prominent part of the rib,) or even almost to its base. Number of radial 
spines, 7 to 11. The description of the flower, wanting heretofore, may be given thus: 
Floribus versus apicem congestis virescenti,flavis pollicaribus; ovaribsepalis squamiformibus 
paucis (2-5) orbiculatis seu reniformibus munito; sepalis tubi 10-15, inferioribus ovatis, supe- 
rioribus oblongis obtusis; petalis sub 8 chiunaen mucronatis; infimo| tubi parte intus nudo; 
filamentis tenuissimis numerosis; stylo exerto sursum clavato apice infundi buliformi in stigmata 
5 brevissima erecta sG@-conniventia diviso. 
"The flowers are one inch long, greenish red, externally tinged with brown red; stigma 
green. The fruit remains unknown as yet; the large seed has been figured in the work men- 
tioned. 
Ecuinocactus Lecontel, Engelm. in M. B. R. II, p. 23, t. 27, & P. KR. R. 1. c., p. 28, t. 2, 
J. 3-5 ; Syn. Cact., p. 18. In the Colorado valley; in flower in April. Specimens of 3-5 inches 
diameter have below eight, and upwards thirteen ribs; those of 9-12 inches show 19-21 ribs. 
The lowest bunches (those developed probably in the 3d or 4th year) have eight radial and one 
central spine, all annulated. The central one is curved, not hooked; one, or even three, of the 
lower radial ones are often hooked. The fully developed bunches consist of four central spines, 
the upper and lower one of which is quite flat, five or seven lower radial ones, never hooked, 
three upper ones, and 6-12 slender, bristly, radial spines. The ovary is covered with about 
thirty sepaloid scales, in the specimens examined, in ;*; or ;; arrangement. 
Ecutnocactus? Young specimens, 3-5 inches high, of another evidently large species, 
were collected, with thirteen ribs— four central and five lower, stouter, and 3-6 upper slender 
radial spines, all annulated and curved. The plants, showing no indication of floriferous areole, 
must be undeveloped; they may possibly be young ones of £. polycephalus, or belong to species 
yet unknown to us. 
ECHINOCACTUS VIRIDESCENS, Nutt. in Torr. and Gray, Fl. I, p. 554. Engelm. in M. B. R. 
IT, p. 24, t. 29; Syn. Cact.,p. 19. San Diego, California. 25-30 scales on yellow fruit. Seed 
as described in M. B. R., but the pits are much closer together than in fig. 6. c! The hooked 
acute cotyledons are bent over a rather copious albumen; similar to those of EZ. Wislizeni, t. 
25, f. 4. e. 
Cereus Fenpiert, Engelm. in Plant. Fendl. in Mem. Am. Acad. 1848, p. 51, M. B. R. IT, p. 
33, t. 51-53; Syn. Cact., p. 25. Coveras, New Mexico, and from Laguna to Santa Fé; fl. April. 
CEREUS PHOENICEUS. Ls Bagel, PUR, BT. ¢., p. 84, t. 4, f 1; Syn. Cact.; p. 28; Tokens 
coccineus, Engelm. in Wisliz. Rep. N. Mex. note 9. 
This is Mamillaria aggregata, Emory’s Report, 1848, and the ‘‘.Aggregated Cactus’’ of the 
explorers of the western parts of New Mexico and the Gila regions. It grows in large dense 
masses, often 100 or 200 heads from a single base, the whole often of the shape and size of a bushel 
basket, generally on apparently naked rocks; in the proper season densely covered with beautiful 
crimson flowers. It was found from Camp 64 to Camp 78 (Yampai valley to Partridge creek) 
in flower in April. The flowers collected are less than 2 inches long, much more densely covered 
with bristle-bearing sepals than the next species, and with only 5 stigmata; the naked space in 
the base of the tube is nearly four lines long. The fruit and seed of this common plant, which 
has now been known to science for twelve years, still remains unknown, and living plants are 
as yet extremely scarce. 
Cereus conorpEus, Engelm. & Bigelow, |. c., p. 35, t. 4, f. 4-5; Syn. Cact., p. 28. Camp 96. 
(Oryabe gardens, Moqui country.) 
