. Carnegie Institution of Washington publication. FIG. 96.—Opuntia vilis. 53. Opuntia bulbispina Engelmann, Proc. Amer. Acad. 3: 304. 1856. Stems low, forming wide-spreading clumps 6 to 12 dm. broad; joints ovoid in outline, 2 to cm. long by 10 to 12 mm. in diameter; tubercles prominent, 6 to 8 mm. long; radial spines 8 to 12, acicular, 3 to 6 mm. long; central spines 4, much stouter than the radials, 8 to 12 mm. long, bulbose at base; flower and fruit not described in original description and as yet unknown. Type locality: Near Perros Bravos, north of Sal- tillo, Mexico. Distrib
. Carnegie Institution of Washington publication. FIG. 96.—Opuntia vilis. 53. Opuntia bulbispina Engelmann, Proc. Amer. Acad. 3: 304. 1856. Stems low, forming wide-spreading clumps 6 to 12 dm. broad; joints ovoid in outline, 2 to cm. long by 10 to 12 mm. in diameter; tubercles prominent, 6 to 8 mm. long; radial spines 8 to 12, acicular, 3 to 6 mm. long; central spines 4, much stouter than the radials, 8 to 12 mm. long, bulbose at base; flower and fruit not described in original description and as yet unknown. Type locality: Near Perros Bravos, north of Sal- tillo, Mexico. Distribution: Coahuila and probably into Durango, Mexico. The type of this species was collected by Josiah Gregg in 1848 and it has not with certainty been found since; it has been reported from one or two localities, but doubtless erroneously. At one time we supposed certain plants collected by Dr. Palmer in Chihuahua were to be thus referred. It is possible that specimens collected by Dr. Chaffey near lyerdo, Durango, may be referred here, as they have the short joints of this species, but the central spines are much longer, often reaching to cm. long. The type is deposited in the Engelmann Herbarium at St. Louis, and although the material is poor, it may yet serve to clear up this species definitely. As stated by Coulter, this species has been re- garded as the same as O. tunicata, a plant to which it is very remotely related. Illustration: Cact. Mex. Bound, pi. 73, f. 5, 6. Figure 97 is copied from the illustration above cited. 54. Opuntia grahamii Engelmann, Proc. Amer. Acad. 3: 304. FIG. 97.—Opuntia bulbispina. 1856. Roots at first thick and fleshy, becoming woody, 2 cm. thick or more; plant low, much branched, spreading, forming low mounds often half buried in the sand, sometimes giving off roots at the are- oles; terminal joints erect, clavate, bright green, 3 to 5 cm. long, with large oblong tubercles; leaves thick, bronze-colored, ovate, acute, 3 to 4 mm. long; a
Size: 2428px × 1029px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1902
