CACTACEH OF THE BOUNDARY. 197 
fruit, and the larger and irregularly tuberculated seed. I take great pleasure to acknowledge my indebtedness to the 
modest and faithful artist, Mr. Paulus Reetter, who has adorned this memoir by his skilful pencil, by naming this 
species after him. 
9. C. Frenptert, E. in Plant. Fendl.: simplex, seu parce e basi ramosus, ovatus seu ovato-cylindricus, per- 
viridis ; costis 9-12 rectis seu obliquis tuberculato-interruptis; areolis orbiculatis, junioribus dense tomentosis sub- 
confertis ; aculeis basi bulbosis, radialibus 7-10 rectis seu seepe curvatis, inferioribus robustioribus, infimo 4-angulato 
albido, inapentias 2 obscuris, czeteris albidis seu sepius fusco-variegatis, superioribus tenuioribus pallidis, summo 
deficiente seu robusto elongato curvato; aculeo centrali valde bulboso teretiusculo: elongato fusco-atro sursum curvato 
rarissime deficiente ; floribus wilonia purpureis subverticalibus ; ovarii tubique pails illis 25-35 aculeolos 
3-12 albos sepe adustos gerentibus ; aR eo 12-15 Sateen seu spathulatis acutis seu [34] 
cuspidatis; petalis 16-24 oblongo-linearibus seu obovato-spathulatis acutis seu obtusis mucronatis spe eroso- 
denticulatis ; stigmatibus 12-16 stamina numerosissima vix superantibus erectis; bacca ovato-globosa ex viridi pur- 
purascente pulvillis aculeolatis 18-20 stipata ; seminibus oblique obovatis eurvatia paulo compressis scrobiculatis 
(tuberculis irregulariter confluentibus), hilo ovato seu subcirculari basilari; embryone paulo curvato. (Tab 
LI.-LIII. 
In various situations, among rocks or in alluvial river-bottoms from Santa Fé (Fendler) to the cafion of the 
Rio Grande below El] Paso (Wright, Bigelow), and from the country fifty miles east of the upper Pecos westward to 
Zuii and the Aztec mountains (Bigelow) and to the Copper-mines (Thurber). Flowers May and June. — Stems 
single or few together, 3-8 inches high, 2—3 inches in diameter, not many together, and those usually of unequal height, 
not level-topped, like C. phaniceus and others; areole 4-7 lines apart. Spines very variable, but always characterized 
by their bulbous base, by the lower ones being stouter and longer than the upper ones, partly white and dark, and by 
the long and dark central spine, which is always curved upward. Radial spines mostly 7; a white and angular one 
below, 6-12 lines long; the two next ones hardly longer, more terete, black on the upper and usually white on the 
lower surface ; then comes a pair of white or rarely variegated spines, scarcely shorter ; above them two weaker, 
whiter, and shorter spines, 3-6 or 7 lines long. This is the usual form, especially in the north ; often, however, two 
more upper spines are found, and sometimes a slender, or oftener a stout and dark-colored spine, not rarely 12-15 lines 
long, is placed on the upper edge of the areola, similar to but always smaller than the central spine. All these forms 
are occasionally seen on the same specimen, In some southern specimens I observe now and then a few smal 
additional upper spines. The form which I have described in Plant. Fendleriane as B. pauperculus, and which 
Dr. Bigelow collected also on the Pecos, has mostly only 6 spines, —5 lower and tatetal radial ones and the central 
one, which more or less assumes the place of the absent upper radial spine. This, however, is not a constant form, as 
transitions to site usual arrangement of spines are often seen on the same specimen. Central spine very much 
thickened at base, almost terete, black, often with a lighter tip, curved upward, 1-2 inches long. Flower 23-3} inches 
long and wide, not fully open before noon, closing again after two o’clock. Spines on.the ovary 2}—4, on the upper 
part of the tube 4-8 lines long, distinctly bulbous at base, and often angular ; petals 4-7 lines wide, acute or obtusish ; 
stamina about 1,600 in a specimen examined by Mr. Wright, only from the upper and wider part of the tube, Aes 
lower and narrow part 3-4 lines long, naked. Fruit 1- -u inches long, purplish-green, edible. Seeds 0.7 line long, 
very oblique, irregularly pitted, by the tubercles, as it were, running together in twisted lines 
C. ENNEACANTHUS, E, in Wisliz. Rep. : ovato-cylindricus, obtusus, lete viridis, simplex seu plerumque 
dense Saalpitde' ; costis 7-10 obtusis infra dilatatis sursum compressis tuberculatis sulco transverso sepe interruptis, 
sinubus profundis acutis ; areolis orbiculatis msec ; aculeis rectis, radialibus 7-12 (plerumque 8) albis subpel- 
lucidis, inferioribus longioribus, gous singulo (raro 2 superioribus eae rice basi bulboso teretiusculo seu 
plerumque plus minus compresso Co eres, albido stramineo seu o re radialibus longiore ; floribus sub- 
terminalibus seu lateralibus ; ovarii ae 25-35 in squame triangularis axillis villosis aculeolos 6-12 albidos seu 
fuscatos gerentibus ; sepalis tubi saterOrORN 18-20 cum aculeolis longioribus paucioribus, superioribus 10-18 oblanceo- 
latis acutis ; petalis 12-15 oblongo-obovatis erosis obtusis acutisve ; stigmatibus 8-10 viridibus elongatis 
erectiusculis ; bacca subglobosa e purpureo virescente ; seminibus minutis obovatis subobliquis tuberculatis, “hilo [35] 
oblongo. (Tab. XLVIILI. fig. 2-4, et Tab. XLIX.) 
Along the Rio Grande, from El Paso (Wright, Parry) to Eagle Pass (Schott, Bigelow), and into Mexico (Wisli- 
zenus). Flowers April and May. — A widespread species, assuming many forms, sometimes approaching the next. 
Stems generally branching and cespitose, 3-6 inches high, 1 or 24 inches in diameter, fresh green, in winter often 
reddish, even when in full growth appearing flaccid or shrivelled ; areole 6-10 lines apart. Spines remarkably 
at aes = smaller on the lower part of the plant than on the upper one, all bulbose at base, especially the 
central ones ; upper radial spines 3-5 lines, lateral ones 5-12 lines, lower ones 8-16 lines long, all usually less than 
1 inch ; in some specimens the ial spines are almost equal in length, in others they differ very much. Central 
spine satrenaby variable in color, size, and shape ; when young usually yellowish or brownish, at last ash-colored ; in 
