Stenocactus multicostatus Hildmann ex K Schumann

A. Berger 1929 brain cactus

Echinocactus multicostatus Hildmann ex K. Schumann 1898, Echinofossulocactus multicostatus (Hildmann ex K. Schumann) Britton & Rose 1922

Echinofossulocactus lloydii Britton & Rose 1922, Stenocactus lloydii

(Britton & Rose) A. Berger 1929 Echinofossulocactuszacatecasensis Britton & Rose 1922, Stenocactus zacatecasensis (Britton & Rose) A. Berger 1929 Echinofossulocactus erectocentrus Backeberg 1961, not validly published

Plants usually solitary, depressed globose to somewhat cylindrical, bright green, to 6 cm (2.4 in) high and 10 cm (3.9 in) in diameter, rounded above, stem tips covered with fine whitish wool and a few spines. Ribs as many as 120, very thin, sharp edged, compressed and wavy with narrow furrows between. Areoles usually one per rib. Central spines 3, white, papery, curved, four-angled, to 3 cm (1.2 in) long. Radial spines 4, glassy white, straight or slightly curved. Flowers to 2.5 cm (1 in) long, white with purplish violet midveins. Distribution: Coahuila, Chihuahua, and Durango, Mexico.

Stenocactus obvallatus (A. P. de Candolle) A. Berger 1929 tepenexcomitl

Echinocactus obvallatus A. P. de Candolle 1828, Echinofossulocactus obvallatus (A. P. de Candolle) Lawrence 1841 Echinocactus pentacanthus Lemaire 1838, Echinofossulocactus pen-

Stenocactus Multicostatus
Stenocactus multicostatus
Stenocactus obvallatus, photograph by Jean-Marie Soiichon

tacanthus (Lemaire) Britton & Rose 1922, Stenocactuspentacan-thus (Lemaire) A. Bergerex A. W. Hill 1933 Echinofossulocactus caespitosus Backeberg 1950

Plants usually solitary but sometimes forming two stems, depressed globose to globose, gray-green, 6-11 cm (2.4-4.3 in) in diameter. Ribs 30-50, thin, wavy, very broad at the areoles. Areoles 2-4 on each rib. Central spines 4, upper one flattened and wide, reddish brown, to 5 cm (2 in) long, 3-4 mm wide, lateral 2 even wider, angular, spreading. Radial spines 4-6, white, to 1 cm (0.4 in) long. Flowers pale yellow or white, with reddish midveins. Fruits not known. Distribution: Federal District and México, Mexico.

Stenocactus ochoterenanus Tiegel 1933 Echinofossulocactus ochoterenaus (Tiegel) H. C. Whitmore 1934 ?Echinocactus heteracanthus Muehlenpfordt 1845, ? Echinofossulocactus heteracanthus (Muehlenpfordt) Britton & Rose 1922, ?Ste-nocactus heteracanthus (Muehlenpfordt) A. Berger 1929 Stenocactus bustamantei Bravo 1937, Echinofossulocactus busta-

mantei (Bravo) Croizat 1942 Stenocactus lexarzai Bravo 1937, Echinofossulocactus lexarzai (Bravo) Croizat 1942

Echinofossulocactus densispinus Tiegel ex Pechanek 1965 Echinofossulocactus rosasianus H. C. Whitmore ex Pechanek 1965 Echinofossulocactus parksianus C. Schmoll ex Pechanek 1971

Plants solitary, depressed globose, bluish green, stem tips with yellowish wool, to 8 cm (3.1 in) high and 10 cm (3.9 in) in diameter. Ribs about 30, narrow, wavy, widened at each yellowish areole. Central spines 4, yellow, becoming straw colored with age, flat and wide, upper ones 5-6 cm (2-2.4 in) long and 2 mm wide, lower one even wider. Radial spines 22 or more, needle-like, white, extended and curved downward upon the plant body, equal in length, to 1.2 cm (0.5 in) long. Flowers pale pink or white, with purplish midveins. Fruits round, green. Distribution: Querétaro and Guanajuato, Mexico.

Stenocactus ochoterenanus, photograph by Jean-Marie Solichon

Stenocactusphyllacanthus (A. Dietrich & Otto) A. Berger ex A. W.Hill 1933 Echinocactus phyllacanthus A. Dietrich & Otto 1836, Echinofossulocactus phyllacanthus (A. Dietrich & Otto) Lawrence 1841, Ferocac-tus phyllacanthus (A. Dietrich & Otto) N. P. Taylor 1980 Echinocactus tricuspidatus Scheidweiler 1841, Echinofossulocactus tricuspidatus (Scheidweiler) Britton & Rose 1922, Stenocactus tricuspidatus (Scheidweiler) A. Berger 1929

Plants solitary, occasionally more than one stem, depressed globose to short cylindrical, dark bluish green, flat or somewhat depressed apically, 4-10 cm (1.6-3.9 in) in diameter. Ribs 25-60, very thin, strongly undulate. Areoles 1-2 per rib. Central spines 1-3, lance shaped, reddish at first, becoming brownish or gray, 30-80 mm (1.2-3.1 in) long, upper one flattened. Radial spines 2-7, straight, white, bristly or awl shaped, 4-9 mm (to 0.4 in) long. Flowers yellowish white with brownish red throats, to 2 cm (0.8 in) long. Fruits small, green. Distribution: Hidalgo, San Luis Potosi, Zacatecas, and Guanajuato, Mexico. Stenocactus phyllacanthus is one of the most distinctive species of the genus with its small yellowish flowers and few radial spines.

Continue reading here: Stenocactus rectispinus c Schmoll 1969

Was this article helpful?

0 0