Echinomastus mariposensis Hester 1945

lloyd's mariposa cactus, mariposa cactus Neoiloydia mariposensis (Hester) L. D. Benson 1969, Sclerocactus mariposensis (Hester) N. P. Taylor 1987, Pediocactus mariposensis (Hester) Halda 1998

Plants solitary, globose to slightly cylindrical, blue-green, 610 cm (2.4-3.9 in) high, 4-6 cm (1.6-2.4 in) in diameter,

Echinomastus intertextus

Echinomastus mariposensis

Echinomastus warnockii

Echinomastus warnockii

Echinomastas Mariposensis

densely covered by spines. Ribs absent. Tubercles narrowly pointed, to 5 mm long. Central spines 2-4, whitish, often becoming dark with age, lower one turning downward, 15-20 mm (0.6-0.8 in) long. Radial spines 26-32, whitish, radiating and pressed closely to the stem, 4-6 mm (0.2 in) long. Flowers broadly funnelform, pink, to 2.5 cm (1 in) long, 3-4 cm (1.2-1.6 in) in diameter. Fruits greenish, globose. Distribution: Big Bend region of Texas, south into Coahuila, Mexico. Echinomastus mariposensis is listed as threatened in the U.S. Endangered Species Act and is included (as Sclerocactus mariposensis) in Appendix I of cites though my investigations indicate that the species is more common and widespread than originally thought.

Echinomastus unguispinus (Engelmann) Britton & Rose 1922

Echinocactus unguispinus Engelmann 1848, Neolloydia unguispina (Engelmann) L. D. Benson 1974, Sclerocactus unguispinus (Engelmann) N. P.Taylor 1987, Thelocactus unguispinus (Engelmann) G. D. Rowley 1986, Pediocactus unguispinus (Engelmann) Halda 1998

Echinocactus durangensis Rünge 1850, Echinomastus durangensis (Rünge) Britton & Rose 1922, Neolloydia durangensis (Rünge) L. D. Benson 1974, Thelocactus durangensis (Rünge) G. D. Rowley 1986, Pediocactus unguispinus var. durangensis (Rünge) Halda 1998

Echinomastus mapimiensis Backeberg 1953 Echinomastus laui G. Frank & Zecher 1978, E. unguispinus subsp. laui (G. Frank & Zecher) Glass 1998

Plants solitary, globose to short cylindrical, bluish green, 814 cm (3.1-5.5 in) high, 7-11 cm (2.8-4.3 in) in diameter, densely covered by spines. Ribs 18-21, low, tuberculate. Central spines 3-9, whitish to dark, lower one pointing outward and downward, 1.5—3.5 cm (0.6-1.4 in) long. Radial spines 15-30, widely and irregularly spreading, some interlacing, whitish, become gray with age, 1.5-3.3 cm (0.6-1.3 in) long. Flowers funnelform, dirty brownish red, to 2.5 cm (1 in) long. Distribution: Chihuahua, Coahuila, Durango, Zacatecas, and San Luis Potosí, Mexico.

Echinomastus warnockii (L. D. Benson) Glass &R. Foster

1975 warnock cactus

Neolloydia warnockii L. D. Benson 1969, Sclerocactus warnockii (L. D. Benson) N. P. Taylor 1987, Pediocactus warnockii (L. D. Benson) Halda 1998

Plants solitary, light colored, ovoid, 7-11 cm (2.8-4.3 in) long, 5-7 cm (2-2.8 in) in diameter, densely covered by spines. Ribs 13-21, laterally compressed and forming distinct

Echinomastus unguispinus

Echinopsis adolfofriedrichü 255

tubercles. Central spines 4-6, straight, tan with dark tips, lower one pointing downward, 1.2-2.5 cm (0.5-1 in) long. Radial spines 12-14, similar to the centrals, spreading irregularly, 1-2 cm (0.4-0.8 in) long. Flowers pink to white, 2-2.5 cm (0.8-1 in) long and in diameter. Distribution: west Texas, especially the Big Bend region, and neighboring Mexico.

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