. Carnegie Institution of Washington publication. FIG. 183.—Opuntia covillei. Xo-4- Type locality: On the Mojave, west California. Distribution: Known only from the type locality. The fragmentary type speci- men has been examined; we have been unable to refer any other specimens to this species, which is thus very imperfectly under- stood. Illustration: Pac. R. Rep. 4: pi. 9, f. 6 to 8. 147. Opuntia covillei Britton and Rose, Smiths. Misc. Coll. 50: 532. 1908. Opunlia megacarpa Griffiths. Rep. Mo. Bot. Card. 20: 91. 1909. Opuntia ntgosa Griffiths, Proc. Biol. Soc. Washington 27: 27. 1914. Bush


. Carnegie Institution of Washington publication. FIG. 183.—Opuntia covillei. Xo-4- Type locality: On the Mojave, west California. Distribution: Known only from the type locality. The fragmentary type speci- men has been examined; we have been unable to refer any other specimens to this species, which is thus very imperfectly under- stood. Illustration: Pac. R. Rep. 4: pi. 9, f. 6 to 8. 147. Opuntia covillei Britton and Rose, Smiths. Misc. Coll. 50: 532. 1908. Opunlia megacarpa Griffiths. Rep. Mo. Bot. Card. 20: 91. 1909. Opuntia ntgosa Griffiths, Proc. Biol. Soc. Washington 27: 27. 1914. Bushy plants, usually growing in dense thickets; joints orbicular to obovate, 10 to 20 cm. long or more, pale green, sometimes purplish, slightly glaucous; areoles 2 to 4 cm. apart; spines several from an areole, slender, unequal, the longest ones 6 cm. long, white when young, brownish when old; flowers large, yellow. Type locality: San Bernard- ino, California. Distribution: Interior valleys of southern California. Opuntia covillei and O. vaseyi grow in the same valleys, often in adjoining colonies, and while hybrids may occur, the two species could easily be distinguished. When growing. ^- - FIG 184.—Opuntia Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington


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