. Carnegie Institution of Washington publication. ECHINOCEREUS. 15 This species passes generally as E. polyacanthus Engelmann, a Mexican species with which it was confused in the Report on the Cactaceae of the Mexican Boundary, but as stated by Mr. Standley that species "is amply separated by the presence of long, white wool in the areoles of the ovary and ; Illustrations: Cact. Mex. Bound, pi. 54, 55, as Cercus polyacanthus. Figure 13 is from a photograph of a plant obtained on the Sierra Blanca, Texas, by Rose, vStandley, and Russell in 1910, which afterward flowered in the c
. Carnegie Institution of Washington publication. ECHINOCEREUS. 15 This species passes generally as E. polyacanthus Engelmann, a Mexican species with which it was confused in the Report on the Cactaceae of the Mexican Boundary, but as stated by Mr. Standley that species "is amply separated by the presence of long, white wool in the areoles of the ovary and ; Illustrations: Cact. Mex. Bound, pi. 54, 55, as Cercus polyacanthus. Figure 13 is from a photograph of a plant obtained on the Sierra Blanca, Texas, by Rose, vStandley, and Russell in 1910, which afterward flowered in the cactus house of the U. S. Department of Fig. 13.—Echinocereus rosei. Fig. 14.—Echinocereus maritimus. 17. Echinocereus maritimus (Jones) Schumann, Gesamtb. Kakteen 273. 1898. Cereus maritimus Jones, Amer. Nat. 17: 973. 1S83. Cereus flaviflorus Engelmann in Coulter, Contr. U. S. Nat. Herb. 3: 391. Echinocereus flaviflorus Schumann, Gesamtb. Kakteen 274. 1898. 1896. Decidedly cespitose, often forming clumps 60 to 90 cm. broad and 30 cm. high, sometimes con- taining 200 joints; individual joints globose to short-cylindric, 5 to 16 cm. long; ribs 8 to 10; areoles 10 to 12 mm. apart; radial spines about 10, spreading; central spines 4, stout and angled, to cm. long; flowers small, including the ovary 3 to 4 cm. long, arising from near the top of the plant, light yellow; inner perianth-segments oblanceolate, rounded at apex; ovary not very spiny; fruit not seen. Type locality: Ensenada, Lower California. Distribution: West coast of Lower California. This is a low, coastal species, perhaps extending all along the west coast of central Lower California. It was first found by Marcus E- Jones at Ensenada and was recently collected at the same locality by Ivan M. Johnston, April 7, 1921 (No. 3007). Dr. Rose found it in abundance about San Bartolome Bay and introduced a great quantity into culti- vation. It has frequently flowered both in the New York Botanical Gar
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