Echinocereus boycethompsonii Orcutt 1926

boyce-thompson hedgehog

Echinocereus fascicuiatus vat. boyce-thompsonii (Orcutt) L. D. Benson 1969, E. fascicuiatus subsp. boyce-thompsonii (Orcutt) N. P. Taylor 1997

Plants occurring in loose clumps of 3-12 stems. Stems cylindrical to elongate, green, 10-25 cm (3.9-9.8 in) long, 4-7.5 cm (1.6-3 in) in diameter, with spines not obscuring the stems. Ribs 12-18, sometimes more, not distinctly tuber-culate. Central spines 3, slender, deflexed, flexible, light colored, yellow, or straw colored, with dark or light brown tips, straight, 2.5-7.5 cm (1-3 in) long, lowermost one about 5 cm (2 in) long. Radial spines 10-14, whitish or grayish, spreading, straight, 1.2-2 cm (0.5-0.8 in) long. Flowers borne on the upper half of the stems, broadly funnelform, magenta to reddish purple, 5-6.2 cm (2-2.4 in) long and in diameter. Fruits globose, green, becoming red, fleshy. Distribution: Sonoran Desert of central Arizona.

Echinocereus brandegeei (J. M. Coulter) K. Schumann 1897

casa de ratas, pitayita, strawberry cactus Cereus brandegeei J. M. Coulter 1896

Cereus mamillatus Engelmann 1896, Echinocereus mamiliatus (Engel-mann)Britton&Rose 1922

Plants many-stemmed, forming loose clumps to 2 m (6.6 ft) wide. Stems cylindrical, basally prostrate but erect at the tips, variable in size but to 1 m (3.3 ft) high and 6 cm (2.4 in) or more in diameter, light green, covered with spines. Ribs 8-10, formed from well-defined, strongly angled tubercles. Spines varying in color from white to black. Central spines 4, form

ing a cross, flattened, strongly angled, stiff, swordlike, 3-13 cm (1.2-5.1 in)long. Radial spines 10-18, stiff, round, to 2 cm (0.8 in) long. Flowers borne from the stem tips to the bases, broadly funnelform, pale purplish lavender to pale pink, with bright red throats, 5.5-9.5 cm (2.2-3.7 in) long, 4-8.3 cm (1.6-3.3 in) in diameter. Fruits globose, red. Distribution: Baja California Peninsula, Mexico, and some of the islands in the Gulf of California.

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