Micranthocereus dolichospermaticus Buining

Brederoo) F. Ritter 1979 Austrocephalocereus dolichospermaticus Buining & Brederoo 1974, Siccobaccatus dolichospermaticus (Buining & Brederoo) P. J. Braun & Esteves 1990

Plants nonbranching, columnar, to 2 m (6.6 ft) high. Stems bluish, to 8 cm (3.1 in) in diameter. Ribs about 30, somewhat tuberculate, to 1 cm (0.4 in) high. Areoles oval, with bright brown wool. Central spines 6-8, straight, erect, yellowish, becoming gray with age, to 25 mm (1 in) long. Radial spines many, 4-7 mm (to 0.3 in) long. Cephalia to 35 cm (14 in) long and 6 cm (2.4 in) wide, with white to cream wool to 4 cm (1.6 in) long and bright to dark red bristles to5cm (2in) long. Flowers open at night, tubular to somewhat bell shaped, white, to 4 cm (1.6 in) long and 2.5 cm (1 in) in diameter. Fruits cup shaped, brownish, to 7 mm (0.3 in) long and 9 mm (0.4 in) in diameter. Distribution: Bom Jesus de Lapa, Bahia, Brazil.

Micranthocereus estevesii (Buining & Brederoo) F. Ritter 1979

Austrocephalocereus estevesii Buining & Brederoo 1975, Siccobaccatus estevesii (Buining & Brederoo) P. J. Braun & Esteves 1990 Austrocephalocereus estevesii subsp. grandiflorus Diers & Esteves 1989, Siccobaccatus estevesii subsp. grandiflorus (Diers & Esteves) P.J. Braun & Esteves 1990 Austrocephalocereus estevesii subsp. insigniflorus Diers & Esteves 1989, Siccobaccatus estevesii subsp. insigniflorus (Diers & Esteves) P.J. Braun & Esteves 1990

Plants columnar, rarely branching, to 6 m (20 ft) high. Stems bluish green, to 15 cm (5.9 in) in diameter. Ribs 37-42, narrow. Areoles round, with yellowish white wool and hairs. Spines light brown. Central spines 6-7, slightly bent, 2-35 mm (to 1.4 in) long. Radial spines about 12, needle-like, 5-11 mm (0.2-0.4 in) long. Cephalia 5-7 cm (2-2.8 in) wide, with white to cream woolly hairs to 2.2 cm (0.9 in) long and red bristles to 0.8 cm (0.3 in) long. Flowers broad funnelform,

Micranthocereus auriazureus, photograph by Jean-Marie Solichon

Micranthocereus flaviflorus, photograph by Urs Eggli

Micranthocereus polyanthus, photograph by Jean-Marie Solichon

Micranthocereus auriazureus, photograph by Jean-Marie Solichon

Micranthocereus flaviflorus, photograph by Urs Eggli

Micranthocereus polyanthus, photograph by Jean-Marie Solichon

Austrocephalocereus Lehmannianus

Micranthocereus purpureus, photograph by Urs Eggli white, to 3.5 cm (1.4 in) long and in diameter. Fruits light blue, to 1.3 cm (0.5 in) long and 0.9 cm (0.4 in) in diameter. Distribution: between Campos Belos, Goiäs, and Taguatinga, Federal District, Brazil.

Micranthocereus flaviflorus Buining 8t Brederoo 1974 Micranthocereus uilianus Brederoo & Bercht 1984, M. flaviflorus var.

uilianus (Brederoo & Bercht) P.J. Braun & Esteves 1995 Micranthocereus densiflorus Buining & Brederoo 1974, M. flaviflorus subsp. densiflorus (Buining & Brederoo) P. J. Braun & Esteves 1995

Plants columnar, branching basally, to 75 cm (30 in) high. Stems bluish green, to 4 cm (1.6 in) in diameter. Ribs about 16, slightly tuberculate. Areoles oval, with white wool, aging gray, and white hairs to 10 mm (0.4 in) long. Spines yellowish brown, later dirty white. Central spines about 9, one robust in the center to 2 cm (0.8 in) long, others 6-13 cm (2.4-5.1 in) long. Radial spines numerous, translucent, to 0.5 cm long. Cephalia with white wool and hairlike spines to 1 cm (0.4 in) long. Flowers tubular, red to rose red to bright cream, to 18 mm (0.7 in) long and 6 mm (0.2 in) in diameter. Fruits berrylike, bright red, 7-8 mm (0.3 in) long and in diameter. Distribution: Bahia, Brazil.

Micranthocereus polyanthus (Werdermann) Backeberg 1942

Cephalocereus polyanthus Werdermann 1933, Arrojadoa polyantha (Werdermann) D. R. Hunt 1987

Plants columnar, branching basally to 1.25 m (4.1 ft) high. Stems bluish green, 3.5-5 cm (1.4-2 in) in diameter, almost completely covered with white wool. Ribs 15-20, low. Areoles 1-2 cm (0.4-0.8 in) apart, with white wool. Central spines 3-7, golden yellow to reddish, to 3 cm (1.2 in) long. Radial spines 20-30, needle-like, whitish to golden yellow, 0.5-1.2 cm (0.2-0.5 in) long. Cephalia near the stem tips, not strongly evident. Flowers tubular, usually profuse, rose red to pinkish to cream, 1.6-1.8 cm (0.6-0.7 in) long. Fruits rose red. Distribution: Bahia, Brazil.

Micranthocereus purpureas (Gurke) F. Ritter 1968 Cephalocereus purpureus Gürke 1908, Austrocephalocereus pur-

pureus (Gürke) Backeberg 1942 Cephalocereus lehmannianus Werdermann 1Q33, Austrocephalocereus lehmannianus (Werdermann) Backeberg 1951, Micranthocereus lehmannianus (Werdermann) F. Ritter 1968, Coleocephaloce-reus lehmannianus (Werdermann) F. H. Brandt 1981 Micranthocereus haematocarpus F. Ritter 1979 Micranthocereus ruficeps F. Ritter 1979

Plants columnar, usually unbranched, to 3 m (9.8 ft) or more high. Stems to 12 cm (4.7 in) in diameter. Ribs 12-25, broad, low. Areoles large, close set, with white wool. Central spines 4-10, brown, to 5 cm (2 in) long. Radial spines 15-20, needle-like, white, to 1 cm (0.4 in) long. Cephalia to 1 m (3.3 ft) long and 12 cm (4.7 in) wide, with grayish white wool and reddish brown to black bristles to 2 cm (0.8 in) long. Flowers pink to white, 4-5 cm (1.6-2 in) long. Fruits globose to top shaped, red, to 2.5 cm (1 in) long. Distribution: Bahia, Brazil.

Micranthocereus Strecken Vdri Heek & Van Criekinge 1986

Plants branching basally to form clusters of erect stems to 70 cm (28 in) high. Stems short columnar, bright blue-green to gray-green, later brownish, 5.5 cm (2.2 in) in diameter. Ribs about 25, close set. Areoles oval, with brownish wool and whitish hairs. Spines about 30, yellowish, to 2.3 cm (0.9 in) long with a few brisdes to 10 cm (3.9 in) long. Cephalia well developed, to 20 cm (7.9 in) long and 3.5 cm (1.4 in) wide, with yellowish brown wool to 1.3 cm (0.5 in) long, reddish brown bristles to 2.4 cm (0.9 in) long, and a few spines. Flowers open at night, produced in clusters, tubular, purple, to 22 mm (0.9 in) long and 4 mm in diameter. Fruits berrylike, purple, 1-1.1 cm (0.4 in) long and in diameter. Distribution: west of Seabra, Bahia, Brazil.

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