. Carnegie Institution of Washington publication. I78 THE CACTACICAIC. the changes \ve see in certain other genera such as Cephalocereus, Arri<iil•< •/;<»//// inhabits parts of western Mexico and southern Arizona, which have great aridity, but it usually grows in colonies and in this way seems to withstand the rigor of the desert. Its range is more extensive than that of most cacti and it shows con- siderable variability. Three species of Lophocereus have been described, but appear to be merely geographical races of this one. Illustrations: MacDougal, Bot. N. Amer. Des. pi. 8; Cact. M
. Carnegie Institution of Washington publication. I78 THE CACTACICAIC. the changes \ve see in certain other genera such as Cephalocereus, Arri<iil•< •/;<»//// inhabits parts of western Mexico and southern Arizona, which have great aridity, but it usually grows in colonies and in this way seems to withstand the rigor of the desert. Its range is more extensive than that of most cacti and it shows con- siderable variability. Three species of Lophocereus have been described, but appear to be merely geographical races of this one. Illustrations: MacDougal, Bot. N. Amer. Des. pi. 8; Cact. Mex. Bound, pi. 74, f. 16, as Cercus schottii; Schumann, Gesamtb. Kakteen f. 37, 38, as Piloccreus schottii; Orcutt, Card, and For. 4: f. 69, as C. sargentianus; Monatsschr. Kakteenk. 5: 86, as P. FIG. 251.—Lophocereus schuttii. Figure 251 is from a photograph obtained by Edward Palmer near Guaymas, Sonora; figure 252 shows a section through the upper part of a flowering stem collected by Dr. Rose at Abreojos Point, Lower California, in 1911; figure 253 shows a flower of a plant brought by Dr. MacDougal from Arizona to the New York Botanical Garden in 1902. 37. MYRTILLOCACTUS Console, Boll. R. Ort. Bot. Palermo i: 8. 1897. Large cacti, usually with short trunks and large, much branched tops, the stout, few-ribbed branches nearly ereet, all the areoles bearing the same kind of spines; flowers diurnal, very small, several, sometimes as many as 9 at an areole, with very short tubes and widely spreading perianth- segments; ovary bearing a few minute scales with tufts of wool in their axils, spineless; fruit small, globular, edible; seed very small, black, with basal 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
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