Cereus mirabella N P Taylor 1991

Mirabella minensis F. Ritter 1979, Monvillea minensis (F. Ritter) R. Kies-ling 1994

Plants shrubby, spreading and much branched. Stems blue-green, becoming gray-green, 2-3 cm (0.8-1.2 in) in diameter. Ribs 3-5, wavy, sometimes nearly absent. Areoles round, with short to long white or brown wool. Spines 3-6, yellow with reddish brown bases, straight, needle-like, diverging, to 2.5 cm (1 in) long. Flowers white. Fruits to 3.5 cm (1.4 in) long. Distribution: Minas Gérais, Brazil.

Cereus mortensenii (Croizat) D. R. Hunt & N. P. Taylor 1991 Pilocereus mortensenii Croizat 1950, Pilosocereus mortensenii (Croizat) Backeberg 1960, Subpilocereus mortensenii (Croizat) Trujillo & Ponce 1988 Pilosocereus gruberi Schatzl & H.Till 1982

Plants treelike, to 8 m (26 ft) high, freely branching, often with trunks. Stems cylindrical, bluish at first, later blue-green, to 8 cm (3.1 in) in diameter. Ribs 9, acute. Areoles mostly woolly, hairy toward the tips. Central spines 1-2, stout, yellowish to gray, 3-4 cm (1.2-1.6 in) long. Radial spines 5-7, thin, sharp, brownish to gray, 1-1.5 cm (0.4-0.6 in) long. Pseudocephalium highly developed, hairy. Flowers creamy white, to 6 cm (2.4 in) long and 3.5 cm ( 1.4 in) in diameter. Fruits depressed globose; perianth parts persistent. Distribution: Lara state, Venezuela. The correct taxonomic disposition of the pseudocephalium-bearing Cereus mortensenii is problematic.

Cereus mortensenii, photograph by Keith Grantham

Cereus mortensenii, photograph by Keith Grantham

Cereus Tacuaralensis

Cereus pachyrhizus K. Schumann 1903 Piptanthocereus pachyrhizus (K. Schumann) F. Ritter 1979

Plants shrubby to treelike, sometimes branching, 3-5 m (9.8-16 ft) high. Roots large, tuberous. Stems cylindrical, rounded apically, yellowish green to yellowish brown, slightly glaucous, to 10 cm (3.9 in) in diameter. Ribs 6, strongly compressed laterally, to 5 cm (2 in) high, separated by deep, acute furrows, margins slightly wavy. Areoles round, widely separated. Spines 10-13, sharp, awl shaped, brown to blackish brown, to 3 cm ( 1.2 in) long. Flowers not known. Fruits ellipsoidal, to 5 cm (2 in) long. Distribution: Paraguay. Cereus pachyrhizus is poorly known.

Cereus phatnospermus K. Schumann 1899 Monvilleaphatnospermus (K. Schumann) Britton & Rose 1920

Plants shrubby, mostly prostrate. Stems long cylindrical, light green to brownish, tapering toward the tips, 1-2 m (3.3-6.6 ft) long, to 2.5 cm ( 1 in) in diameter. Ribs 4-5, angular. Areoles large, widely separated, woolly. Spines stout, awl shaped, brown, becoming gray with age. Central spine one, sometimes absent, straight, to 2.5 cm (1 in) long. Radial spines 5-6, diverging, to 1.5 cm (0.6 in) long. Flowers white, to 12 cm (4.7 in) long. Fruits elliptical, red, to 7 cm (2.8 in) long. Distribution: Paraguay.

Cereus répandus (Linnaeus) P. Miller 1768

cadushi, giant club cactus, hedge cactus, peruvian apple cactus

Cactus répandus Linnaeus 1753, Subpilocereus répandus (Linnaeus)

Backeberg 1951 Cactus peruvianus Linnaeus 1753, Cereus peruvianus (Linnaeus) P. Miller 1768, Piptanthocereus peruvianus (Linnaeus) Riccobono 1909

Cereus margaritensis J. R. Johnston 1905, Subpilocereus margariten-sis (J. R. Johnston) Backeberg 1941, Pilocereus russelianus subsp. margaritensis (J. R. Johnston) Croizat 1950 Cereus grenadensis Britton & Rose 1920, Subpilocereus grenadensis

(Britton & Rose) Backeberg 1960 Cereus remolinensis Backeberg 1930, Pilocereus remoiinensis (Backeberg) Backeberg 1935, Subpilocereus remolinensis (Backeberg) Backeberg 1951, Cephalocereus remolinensis (Backeberg) Borg 1951

Cereus atroviridis Backeberg 1931, Subpilocereus atrovirldls (Backeberg) Backeberg 1941 Cereus margaritensis var. micracanthus Hummelinck 1938, Subpilocereus répandus subsp. micracanthus (Hummelinck) Trujillo & Ponce 1988

Plants treelike, often with many upright or slightly curved branches above, to 10 m (33 ft) high, often with distinct trunks. Stems cylindrical, segmented, gray-green, 10-20 cm

Cereus tacuaralensis 149

(3.9-7.9 in) in diameter. Ribs 9-10, fairly low, rounded, to 1 cm (0.4 in) high. Areoles small, widely separated. Spines extremely variable, often numerous, sometimes absent, gray, needle-like, the longest to 5 cm (2 in). Flowers white with reddish tips, 12-15 cm (4.7-5.9 in) long. Fruits globose to elongate, red with white pulp, to 4 cm (1.6 in) long. Distribution: widely cultivated and thus difficult to know its natural occurrence; probably native to the western Caribbean and Venezuela. Fruits and stems of Cereus repandus are edible, the cactus is cultivated for use as a living fence, its wood has been used in making furniture and for firewood, and sliced stems have been used as a soap substitute (Chapter 2, under Cacti as Food, and Other Uses of Cacti).

Continue reading here: Cereus roseiflorus Spegazzini 1925

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