Turbinicarpus booleanus G s Hinton 1996

Plants solitary, globose to obovate, green, 2.5-4.5 cm (1-1.8 in) high, 2.5-5.5 cm (1-2.2 in) in diameter. Roots tuberous, connected to the stem by a narrow neck 1-5 cm (0.4-2 in) long. Tubercles rhomboid, to 4 mm high. Central spines 2, white basally but dark toward the tip, erect, 12-21 mm (0.5-0.8 in) long. Radial spines 18-20, sometimes fewer or more, white, 3-17 mm (to 0.7 in) long. Flowers pale to dark magenta, 2.5 cm (1 in) long, 2 cm (0.8 in) in diameter. Fruits dark green to purple, 7 mm (0.3 in) long, 6 mm (0.2 in) in diameter, with two scales. Distribution: gypsum outcrops east of San Roberto, Nuevo León, Mexico. All species of Turbinicarpus are listed in Appendix I of cites. Turbinicarpus booleanus seems to be most closely related to T. subterraneus, and it may prove taxonomically preferable to recognize it at an infraspecific rank under the latter species.

Turbinicarpusgielsdorfianus (Werdermann) V John & Riha 1983

Echinocactus gielsdorfianus Werdermann 1929, Neolloydia gielsdorfi-ana (Werdermann) F. M. Knuth 1935, Thelocactus gielsdorfianus (Werdermann) Borg 1937, Gymnocactus gielsdorfianus (Werdermann) Backeberg 1951, Pediocactus gielsdorfianus (Werdermann) Halda 1998

Plants usually solitary, occasionally clustering. Stems globose to sometimes globose cylindrical, blue-green to yellow-green, 5-7 cm (2-2.8 in) high, 4.5-5 cm (1.8-2 in) in diameter, with

white wool in the tips. Tubercles broad, angular, somewhat conical, 3-5 mm high. Central spine 0-1, whitish, becoming dark at the tip, erect, straight, 18-20 mm (0.7-0.8 in) long. Radial spines 6-8, whitish, radiating, straight, to 20 mm (0.8 in) long. Flowers white with darker midribs, 1.3-2.5 cm (0.5-1 in) long, 1.5-2 cm (0.6-0.8 in) in diameter. Fruits light green, slightly elongate, 5-6 mm (0.2 in) long, 3-4 mm in diameter. Distribution: valley of Jaumave, Tamaulipas, Mexico. All species of Turbinicarpus are listed in Appendix I of cites.

Turbinicarpus hoferi J. m. Lüthy & a. b. Lau 1991 Pediocactus hoferi (J. M. Lüthy & A. B. Lau) Halda 1998, Neolloydia hoferi (I M. Lüthy & A. B. Lau) A.T. Powell 1999

Plants solitary, depressed globose, gray-green, 3-5 cm (1.2-2 in) in diameter. Tubercles rounded to rhomboid. Spines dimorphic: those of juvenile plants 6-13, white, pectinate, 2-3 mm long, those of adults 4-7, needle-like, not corky, gray with darker tips, 3-5 mm long. Flowers white, 2.5 cm (1 in) long, 1.5-2 cm (0.6-0.8 in) in diameter. Fruits greenish, becoming brownish, 5-7 mm (0.2-0.3 in) long, 3.5-4 mm in diameter. Distribution: a restricted area near Aramberri, Nuevo León, Mexico. All species of Turbinicarpus are listed in Appendix I of cites.

Turbinicarpus horripilus (Lemaire) v. John & Riha 1983 Mammillaria horripila Lemaire 1838, Echinocactus horripilus (Lemaire) Lemaire 1839, Gymnocactus horripilus (Lemaire) Backeberg 1951, Thelocactus horripilus (Lemaire) Kladiwa & Fittkau 1970, Neolloydia horripila (Lemaire) E. F. Anderson 1986, Bravocactus horripilus (Lemaire) Doweld 1998, Pediocactus horripilus (Lemaire) Halda 1998

Thelocactus goldii Bravo 1955, Gymnocactus goldii (Bravo) Y. Itó 1981

Plants often clustered. Stems 4-6.5 cm (1.6-2.6 in) in diameter, globose to elongate globose, olive green, 7-18 cm (2.8-

Turbinicarpus gielsdorfianus

7.1 in) high. Tubercles well developed, conical, 5-7 mm (0.20.3 in) high. Central spine usually one, white with dark tip, erect, straight, 12-18 mm (0.5-0.7 in) long. Radial spines 12-14, white with dark tips, erect, straight, 9-11 mm (0.4 in) long. Flowers magenta with whitish throats, 2.2-3.1 cm (0.91.2 in) long, 2.5-3.5 cm (1-1.4 in) in diameter. Fruits elongate, greenish red, becoming yellowish brown at maturity, 4-6 mm (0.2 in) long, 3-5 mm in diameter. Distribution: valley of Metztitlán, Hidalgo, Mexico. All species of Turbinicarpus are listed in Appendix I of cites.

Turbinicarpus jauernigii G. Frank 1993 Turbinicarpus lophophoroides subsp. jauernigii (G. Frank) Battaia &Zanovello 1995, Pediocactus lophophoroides var. jauernigii (G. Frank) Halda 1998

Plants usually solitary. Stems globose, green, minutely floc-culose, 1-2 cm (0.4-0.8 in) high, 2.5-5 cm (1-2 in) in diameter. Tubercles poorly developed, low, rounded. Spine usually one, white with dark tip, erect, straight, 5-8 mm (0.2-0.3 in) long. Young plants sometimes with 7-10 radial spines. Flowers dirty pale brown, to 2.5 cm (1 in) long and 1.5 cm (0.6 in) in diameter. Fruits not known. Distribution: San Luis Potosí, Mexico. All species of Turbinicarpus are listed in Appendix I of cites. Turbinicarpus jauernigii was inadequately described originally and is not well known.

Turbinicarpus knuthianus (Boedeker) V. John 8c Riha 1983 Echinocactus knuthianus Boedeker 1930, Thelocactus knuthianus (Boedeker) Borg 1937, Gymnocactus knuthianus (Boedeker) Backeberg 1951, Neolloydia knuthiana (Boedeker) E. F. Anderson 1986, Pediocactus knuthianus (Boedeker) Halda 1998

Plants usually solitary, slightly depressed globose, bluish green, 3-6 cm (1.2-2.4 in) high, 3.5-7 cm (1.4-2.8 in) in diameter. Tubercles conical, 5-7 mm (0.2-0.3 in) high. Central

Turbinicarpus horripilus

Turbinicarpus knuthianus

Turbinicarpus laui Turbinicarpus lophophoroides spines 1-2, white, curving slightly upward, 10-16 mm (0.40.6 in) long. Radial spines 15-20, white, radiating, slender, straight, 6-8 mm (0.2-0.3 in) long. Flowers light magenta with darker midribs, 2.3-2.8 cm (0.9-1.1 in) long, 1.8-2.5 cm (0.7-1 in) in diameter. Fruits yellowish green, nearly round, 7-9 mm (0.3-0.4 in) long, 7-8 mm (0.3 in) in diameter. Distribution: near Guadalcazar, San Luis Potosí, Mexico. All species of Turbinicarpus are listed in Appendix I of cites.

Turbinicarpus laui Glass & R. Foster 1975 Neolloydia laui (Glass & R. Foster) E. F. Anderson 1986, Pediocactus laui (Glass & R. Foster) Halda 1998, Strombocactus laui (Glass & R. Foster) Mays 1999

Plants solitary, flattened globose, yellowish green, 0.5-1.5 cm (0.2-0.6 in) high, 1.2-3.5 cm (0.5-1.4 in) in diameter. Tubercles broad, conical, 3-5 mm high. Spines all radial, 6-8, brownish white, radiating, more or less straight, 12-22 mm (0.5-0.9 in) long. Flowers white with brownish midribs, 1.82.5 cm (0.7-1 in) long, 3.1-3.5 cm (1.2-1.4 in) in diameter. Fruits greenish to brown, slightly elongate, 5-7 mm (0.2-0.3 in) long, 5 mm in diameter. Distribution: south of Villa Juárez, San Luis Potosí, Mexico. All species of Turbinicarpus are listed in Appendix I of cites.

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