Plante Lindheimeriane. 207 
date ; stigma 5-lobed, erect; fruit 2} inches long, 6-8 lines 
wide at the top, deeply umbilicate. Lindheimer’s specimens 
are from Industry, south of the Brazos. I believe I have 
seen the same species near Natchitoches on Red River. 
O. Linpuetmert (n. sp.): erecta, robusta ; caule lignoso ; 
articulis (magnis) ellipticis basi attenuatis planis; _pulvillis 
remotis ad margines confertioribus griseo-tomentosis, setis 
flavidis aculeisque paucis instructis 1-3 compressis validis 
deflexis varie divergentibus stramineis, nunc cum 1 —2 aculeis 
adventitiis gracilioribus; flore . . . bacca clavata elongata 
subpulposa glabrata ; seminibus late marginatis About New 
Braunfels. Plant erect, often 6-8 feet high: stems terete 
ligneous, sometimes 6 inches in diameter, with gray bark, and 
very light, spongy wood. Larger joints 9—12 inches long, 
5-7 broad. Areole 1!—2 inches distant on old joints; 
bristles on them 1-3 lines long. Spines all pale yellow, 
much compressed, indistinctly annulated, }—1 inch long, 
various; the 3 longer spines, or the one longer, with one or 
two shorter spines. The fruit, which Lindheimer has sent as 
belonging to this species, resembles very much that of O. vul- 
garis, 2—2% inches long, slender, with a deep umbilicus, very 
different from that of the following species. Seeds 2-2: lines 
in diameter, not numerous. Young plants grown from this 
seed have the same compressed spines, but are brown at the 
base ; the lower areolz produce no spines, but a quantity of 
long, coarse hair. — I add here the following species, though 
not properly belonging to the flora of Texas, because I suspect 
that it is also found at the mouth of the Rio Grande, within 
the limits of Texas. There,and especially on the barren sand 
islands at the Brazos, near Point Isabel, the St. Louis Volun- 
teers found large and impenetrable thickets formed by an 
Opuntia with large joints, covered with almost globose fruits, 
with innumerable small seeds, and a very luscious deep red 
pulp. The fruit and seed are before me, but unfortunately I 
did not obtain a living specimen. 
O. Encetmanni (Salm, Mss.): erecta; articulis orbiculato- 
