CACTACEZ OF THE BOUNDARY. 187 
ones spatulate, mucronate, with rose-colored edges 6-9 lines long, 2 lines wide ; petals about 12 in a single series, 
9 lines long, 2 lines wide, rose or pink-colored ; stamens numerous, white, with orange anthers; style white, 
expanding into a funnel-shaped irregularly 5-10-parted light-yellow stigma. Fruit oval, crowned with the remains of 
the flower, about 5 lines long, juicy. Seed 0.8 line long, strongly iplarealated, the transverse and somewhat truncate 
hilum basilar. 
II. ECHINOCACTUS. Liyk & Orto. 
. E. Scuesri, Salm: e radice tereti elongata parvus, globosus seu ovatus ; costis 13 obtusis interruptis 
tuberculis ovatis obtusis supra ad medium sulcatis ; areolis ovato-orbiculatis junioribus albo-tomentosis ; eialate 
radialibus 15-18 setaceis rigidis rectis seu plerumque paulo recurvatis albidis stramineisve apice fuscatis, summo 
interdum elongato, centralibus 3-4 angulatis variegatis fusco-atris, superioribus rectis sursum divaricatis longioribus, 
Shik porrecto hamato breviore ; floribus in vertice laxis ; siecle exterioribus 13 squamiformibus, inferior! Wie 
appendiculato-auriculatis margine membranaceo laceris ciliatis, superioribus ovatis integriusculis, rite atc 
8 lineari- oblongis obtusis ; petalis 13 lineari-lanceolatis acutis flavo-virescentibus ; stigmatibus 8 lin 
flavis ;- bacca virescente indistincte squamata; seminibus oblique obovatis compressis minutissime cies [19] 
fuscis, hilo ventrali circulari magno. (Tab. XVII. 
About Eagle Pass, on the Bio Grande ; Schott, Bigelow. Flowers in April. — A most elegant little species, 
14-2 inches in diameter, and of the same height. Root long, terete, rather fleshy, white, about } inch in diameter, 
such as I have not seen in any other of our Cactacee. Tubercles more distinct and less s plainly « rranged in ri 
in the other species of this genus ; they are 4 or 5 lines high, somewhat compressed, of the same transverse diameter, 
and a little longer in the other direction. Areola about 1} line long, a little less broad, extending upward into a 
tomentose groove, 1-2} lines long, which terminates in the floriferous areola half-way down to the axil, as the trans- 
verse incision in the rib may be designated ; this groove is much shorter or almost wanting on the tubercles, which 
bear no Sate The exterior spines, with their bulbous compressed bases, are closely and regularly arranged all 
around the areola, and are strictly radiating : in younger plants I find 11-13, in older flower-bearing tubercles always 
15-18 radial spines, 3-5 lines long, of almost equal length, or the lateral ones a little longer than the rest ; the upper- 
most radial spine, however, is often somewhat stouter and longer, ranging rather as an upper central spine when 
only 3 of these are present. The upper central spines (2 in my specimens from Eagle Pass, 3 in Salm’s original plant) 
surface, or they are lighter throughout, with black tips, —they are 8-12 lines long; the lower central spine is 
2 or 3 lines shorter, black on the upper side, especially at base, and at the hooked point white on the lower surface 
and again on the outside of the curvature. The green flowers are about an inch long, much less in diameter even 
when fully open. Fruit and seed not seen by our collectors. The former is said by Dr. Poselger tons has sent me a 
good specimen of the plant, entirely agreeing with my specimens) to be a small green and almost na 
seeds are large, about 1 line long, 0.8 line in diameter, with very minute and flattened tubercles, brown (the iy 
Echinocactus with seeds of that color known to me); hilum large and circular, surrounded by a thick rim; albumen 
very small ; embryo curved, but cotyledons small, connate, more like those of a Mamillaria, separating on the curvature, 
and not at the end of the hacks as in all other hooked embryos of Cactacee known to me. 
E. BREVIHAMATUS, sp. nov.: e radice turbinata fibrosa globoso-obovatus, atro-viridis ; costis 13 compressis 
<uberculstc-intersayils : sulcis acutis profunde pase tuberculis rage ad basin usque tomentoso-sulcatis ; areolis 
orbiculatis junioribus breviter albo-tomentosis ; aculeis radialibus 12 teretibus rectis albidis seu sordide flavis apice 
adustis, superioribus longioribus ; centralibus 5 scsiipianatia albidis apice atratis, lateralibus sursum divergentibus 
rectis seu paulo recurvatis aculeos radiales superantibus, summo debiliore et infimo porrecto seu deflexo deorsum 
hamato robustiore eos subzquantibus ; floribus infundibuliformibus roseis ; sepalis inferioribus (ovarii) 5-7 reni- 
formibus scariosis ciliatis, superioribus (tubi) 8 ovato-oblongis mucronatis obtusisve ; petalis 13-14 lineari-lanceo- 
latis acutis mucronatis integris; stigmatibus 10-11 radiatis flavis stamina rubella paulo excedentibus. (Tab. 
XVIIL., 5 
the San Pedro, Wright ; and not rare about Eagle Pass, Bigelow. Flowers March and April. —The 
mens sent by the gentlemen of the Boundary Commission were from 2 to 4 inches high and 2-3 in diameter, of a very 
dark green color, and remarkable from the tuft formed on the apex by the upper central — in which the numerous 
flowers are almost entirely hidden ; the lower hooked central spines stand out from the mass of the other spines, 
the hooks turned downward. All the e specimens grew well at first, one flowered abundantly, but all soon died [20] 
from an internal rot ; just as all the specimens of Z. wncinatus did, though they were treated like the other 
Cactacee from the same region, which are doing well. Areole 2 lines in Ausnater, 8-12 lines distant, connected with 
the floriferous areolz in the axils of the tubercles by a tomentose groove of 4 or 5 lines in length. Radial spines 
almost always 12, very rarely 1 or 2 more, 5-10 lines long; upper ones longer than the lower and Tichtcokowasl lateral 
