200 CACTACEH OF THE BOUNDARY. 
exterioribus 8-10 aculeoliferis, superioribus 13-16 oblongo-linearibus acuminatis seu cuspidatis ; petalis 14-18 late 
linearibus seu lineari-oblanceolatis elongatis fere loricatis mucronatis apice denticulatis patulis demum reflexis ; 
stigmatibus 7-10 viridibus ; bacca ovata viridi subsicca ; seminibus parvis obovato-subglobosis tuberculatis, hilo 
circulari, (Tab. LVIII.) 
On the Nueces, Berlandier. Frequently in cultivation in St. Louis, Cincinnati, etc., under the wrong name of 
. repens or C. Deppii, doubtless introduced from southern Texas. Flowers in May and June.— A spreading and 
procumbent plant, with erect branches contracted at base, and thereby articulated, 13-6 inches long, 3-1 inch thick, 
either terete with distinct spirally disposed tubercles, or the tubercles arranged in 5 or 6 ribs. - Areole 4-6 lines apart. 
Radial spines bristle-like, weaker than those of the next species, 4-5 lines long, sometimes a stouter and darker one at 
the upper end of the areola; central spine yellowish-brown, shorter on the lower part of each branch, longer toward 
the top, from 5-6 to 10-13 lines in length. Flower 3-4 inches long, or when fully open spreading almost 4 inches, 
and only 2 inches in height ; bristles of the tube below 2-3 lines, upward 4-6 lines long, the tomentum white and short; 
petals long and narrow, 3-4 or rarely 5 lines wide, bright rose-purple ; filaments short, pale rose-colored ; stigmata long 
and suberect. Berry about 9 lines long, densely covered with the elongated, mottled, hair-like spines. Seeds 0.5 line 
long, strongly and distinctly tuberculated, contracted at base. Nearly allied to C. pentalophus, DC., which, however, 
is an erect plant. ‘ 
Named for Dr. J. L, Berlandier, who made known this as well as many other plants of the lower Rio Grande. 
17. C. pRocuMBENS, E. in Plant. Lindh. 1850: humilis, perviridis ; caule subtereti seu 4-5 angulato articulato- 
ramosissimo ; tuberculis distinctis spiralibus seu 4-5 fariis ; areolis parvis orbiculatis ; aculeis rigidis brevibus albidis 
apice fuscis, 4—6 radiantibus, centrali nullo seu singulo paulo longiore obscuriore ; floribus sub apice ramorum laterali- 
magnis ; ovarii pulvilli sub-25 albido-villosis aculeolos rigidos 6-9 breves variegatos gerentibus ; sepalis tubi 
exterioribus 12-15 aculeoliferis, superioribus sub-15 lineari-lanceolatis acuminatis ; petalis 18-20 lineari-spathulatis 
acutis seu obtusis, integris seu plerumque eroso-dentatis patulis demum recurvis violaceis basi flavidis ; stigmatibus 
10-14 stamina flavicantia superantibus ; bacca ovata viridi irregulariter dehiscente ; seminibus parvulis lenticularibus 
basi hilo oblongo truncatis verruculosis. (Tab. LIX. fig. 1-11.) 
On the Rio Grande below Matamoras. Flowers in May and June. — Similar in habit to the last, but 
more slender, Branches $ to 3 or 4 inches in length, 6-8 lines in diameter ; tubercles 4-5 lines apart, in 4 rows [39] 
when the branches appear acutely quadrangular, or in 5 rows when they are more terete. Radial spines 1-2 lines 
long ; central one on lower part of joint wanting, or hardly longer than the radial ones; on the upper part 2-4 lines 
Flower about 3 inches long and of same width ; petals often reflexed, 4-6 lines wide. Fruit 6 or 8 lines long. 
Seed between 0.4 and 0.5 line long, much compressed, with a narrow hilum ; its tubercles very much smaller than in 
the last species. ; 
- Our plant bears a close resemblance to the last-mentioned one, but may always easily be distinguished by the 
characters enumerated. 
18. C. ruBERosus, Poselger: e radice tuberosa tenuissimus, teres, lignosus, sursum sensim incrassatus, cylin- 
dricus, demum articulatus parceque ramosus, debilis, erectus seu geniculatus et reclinatus ; costis 8 vix prominulis ; 
areolis parvis confertis, junioribus parce sordide tomentosis ; aculeis 9-12 radiantibus parvulis subulatis albidis rectis 
adpressis, inferioribus paulo longioribus, centrali singulo e basi crassa subulato longiore toto seu versus apicem fusco 
sursum arrecto ; floris subterminalis (?) tubo brevi ; pulvillis squamatis albo-lanatis aculeolatis ; sepalis superioribus 
8 lineari-lanceolatis ; petalis 16 oblanceolatis acuminato-aristatis roseis patentibus ; filamentis brevibus ; stylo elon- 
gato ; stigmatibus 8 viridibus; bacca subsicca villosa setosaque floris rudimentisque coronata ; seminibus minutis 
oblique obovatis compressis tuberculato-rugosis serobiculatis. (Tab. LIX. fig. 12.) : 
On the Texan side of the Rio Grande, between Reynosa and Camargo (Dr. Poselger) ; on the Chacon hills, 
three miles below Laredo, and also near Mier, on arid rocky ridges, always among shrubs, “ which support its weak an 
otherwise almost decumbent stem” (A. Schott).—- Tuberous root globular, 3-1} inch in diameter. Stem 1-2 feet 
high ; lower part ligneous, scarcely as thick as a quill; upper younger part and branches 4-8 lines in diameter ; 
young branches few, clavate’; ribs very little prominent ; areole 1-2 lines apart. Radial spines a line long or less ; 
central spine 2-3 lines long; in weak specimens whitish, in robust ones the upper half or the entire spine brown or 
black, rigidly erect and appressed, generally reaching to the second areola above. The flower— which I have not 
myself seen — is described by Dr. Poselger in a letter as being terminal, “so that the ovary is a 
of the stem.” I suppose that it rises from the upper, but certainly not the recent areolz ; and that it cannot be 
truly terminal, —i. e. a continuation of the axis, — which would be in opposition to the character of the whole family. 
Schott also figures the plant as bearing fruit at the end of the branches. Flower over 2 inches long and of the same 
diameter, opening for several days, but only in bright noonday sunshine ; ovary and tube covered with very woolly 
pulvilli in the axils of reddish scales, with 6 or 8 long white or black bristles ; petals rose-colored or purple, about - 
inch long. Fruit covered with long wool and black and white bristles, resembling very much that of C. caspiiosus. 
