Plants commonly branching to form loose clumps of 7-10 stems. Stems cylindrical, gradually tapering toward the tips, green, to 30 cm (12 in) high, 4-7 cm (1.6-2.8 in) in diameter. Ribs 10-14, somewhat tuberculate. Central spines 2-4, not readily distinguishable from the radials, yellowish, erect, 5-40 mm (0.2-1.6 in) long. Radial spines 10-13, slender, yellowish, 3-23 mm (to 0.9 in) long. Flowers borne near the stem tips, funnelform, pinkish lilac to pale violet, 4-5 cm (1.6-2 in) long, 5-6 cm (2-2.4 in) in diameter. Fruits ovoid, green, very spiny. Distribution: western Mexico in Zacatecas and Jalisco.
Echinocereus stoloniferus w. t. Marshall 1938 Echinocereus tayopensis W. T. Marshall 1956, E. stoloniferus var. tay-opensis (W.T. Marshall) N. P. Taylor 1985, E. stoloniferus subsp. tayopensis (W. T. Marshall) N. P. Taylor 1997
Plants usually many-stemmed, branching belowthe ground, forming colonies. Stems ovoid to cylindrical, deep olive green, 9-30 cm (3.5-12 in) high, 5-8 cm (2-3.1 in) in diameter, partly obscured by spines. Ribs 11-16, low, only slightly tuberculate. Central spines 1-5, stout, brownish to gray, lowermost one pointing downward, to 2.5 cm (1 in) long. Radial spines 8-13, gray or whitish, flattened against the stem, to 1.5 cm (0.6 in) long. Flowers borne near the stem tips, short funnelform, bright yellow, to 7.5 cm (3 in) long, 7-10 cm (2.8-3.9 in) in diameter. Fruits reddish, very spiny. Distribution: open forest in northwestern Mexico in Sonora and Chihuahua.
Two subspecies of Echinocereus stoloniferus are recognized. Subspecies stoloniferus has cylindrical stems to 30 cm (12 in) high and 5 cm (2 in) in diameter, with radial spines 6 mm (0.2 in) long; it occurs in southeastern Sonora. Subspecies tayopensis has ovoid to cylindrical stems to only 15 cm (5.9 in) high and 6-8 cm (2.4-3.1 in) in diameter, with radial spines to 15 mm (0.6 in) long; it occurs in eastern Sonora and western Chihuahua.
Echinocereus stramineus (Engelmann) F. Seitz 1870
agostena, pitaya, porcupine hedgehog cactus, sanjuanera, spiny strawberry hedgehog, strawberry cactus, straw-colored hedgehog
Cereusstram/'neusEngelmann 1856 Echinocereus conglomeratus K. Schumann 1898 Echinocereus stramineus var. occidentalis INI. P. Taylor 1988, E. stramineus subsp. occidentalis (N. P. Taylor) N. P. Taylor 1997
Plants many-stemmed, forming large mounds more than 1 m (3.3 ft) wide with as many as 500 stems. Stems cylindrical, gradually tapering toward the tips, to 45 cm (18 in) high and 8 cm (3.1 in) in diameter, usually obscured by spines. Ribs 10-17, slightly tuberculate. Central spines 1-4, stout, round to slightly flattened, straight to somewhat curved, straw colored, becoming whitish, 4-8.7 cm (1.6-3.4 in) long. Radial spines 7-14, pink to yellowish, becoming whitish, to 3 cm (1.2 in) long. Flowers usually borne well away from the stem tips, broadly funnelform, bright magenta, 6-12.5 cm (2.44.9 in) long and in diameter. Fruits globose, red when mature, very fleshy, smelling and tasting of strawberries, with deciduous glassy spines. Distribution: southwestern United States and central northern Mexico.
Two subspecies of Echinocereus stramineus are recognized. Subspecies stramineus is the most widespread, occurring in central northern Mexico, New Mexico, and Texas.
Subspecies occidentalis occurs farther to the west in Mexico, only in Durango; it flowers at least a month later than subspecies stramineus.
Echinocereus subinermis Salm-Dyck ex Scheer 1856 Echinocereus luteus Britton & Rose 1913 Echinocereus ochoterenae J. G. Ortega 1928, E. subinermis var. ochoterenae (J. G. Ortega) G. Linger 1984, E. subinermis subsp. ochoterenae (J. G. Ortega) N. P. Taylor 1997
Plants solitary or branched, often forming clumps with as many as 10 stems. Stems depressed globose to cylindrical, gray-green to reddish green, 4-33 cm (1.6-13 in) high, 4-15 cm (1.6-5.9 in) in diameter. Ribs 5-11, acute, tuberculate or with even edges. Central spines 0-4, light or dark, mostly erect, 1-20 mm (to 0.8 in) long. Radial spines 0-10, slender, pale yellow to gray, 1-30 mm (to 1.2 in) long. Flowers borne near the stem tips, funnelform, fragrant, bright yellow, 7-10 cm (2.8-3.9 in) long, 5-13 cm (2-5.1 in) in diameter. Fruits
Echinocereus stramineus subsp. stramineus obovoid, spiny, gray-green with white pulp, deciduous by a longitudinal slit. Distribution: northwestern Mexico, west of the Sierra Madre Occidental.
Two subspecies of Echinocereus subinermis are recognized. Subspecies subinermis stems are often solitary or have only one or two branches, are sometimes spineless, and have 5-9 ribs. The floral tube is only slightly woolly. It occurs in northern Sinaloa, southern Sonora, and southwestern Chihuahua. Subspecies ochoterenae stems usually have several branches, are always spiny, and have 8-11 ribs. The floral tube is conspicuously woolly. It occurs in southern Sinaloa.
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