Echinopsis cerdana Crdenas 1959

Plants solitary, globose, gray-green, 8-10 cm (3.1-3.9 in) high, 10-20 cm (3.9-7.9 in) in diameter. Ribs 11-16, acute, notched. Areoles white, 2.5-3 cm (1-1.2 in) apart. Spines all stout, awl shaped, gray with brownish tips. Central spine one, 3-6 cm (1.2-2.4 in) long. Radial spines 8-12,1-3 cm (0.41.2 in) long. Flowers open at night, funnelform, white, to 14 cm (5.5 in) long. Distribution: Potosí, Bolivia.

Echinopsis chalaensis (Rauh 8c Backeberg) H. Friedrich 8c

G. D. Rowley 1974 Trichocereus chalaensis Rauh & Backeberg 1956

Plants shrubby with several erect branches, to 4 m (13 ft) high. Stems cylindrical, to 15 cm (5.9 in) in diameter. Ribs 8,

Echinopsis chiloensis; rain sticks made from E. chiloensis illustrated on page 71

broad, with transverse furrows above areoles. Areoles arising from the notches. Spines dark brown, becoming lighter with age. Central spines 2-3, to 5 cm (2 in) long. Radial spines 6-10, to 1 cm (0.4 in) long. Flowers open at night, funnelform, white, to 17 cm (6.7 in) long and 10 cm (3.9 in) in diameter. Distribution: near Chala, Arequipa, Peru.

Echinopsis chamaecereus H. Friedrich 8c Glaetzle 1983 Cereus silvestrii Spegazzini 1905, not Echinopsis silvestrii Spegazzini 1905; Chamaecereus silvestrii (Spegazzini) Britton & Rose 1922, Lobivia silvestrii G. D. Rowley 1967

Plants shrubby, much branched, creeping to form mats and clumps. Stems slender cylindrical, pale green, to 30 cm (12 in) long, 1-1.5 cm (0.4-0.6 in) in diameter. Ribs 6-9, very low. Spines several, short, bristly, whitish or brownish. Flowers open during the day, orange-scarlet, to 7 cm (2.8 in) long; floral tubes narrow, with long brownish or whitish hairs. Distribution: Tucuman, Argentina.

Echinopsis chiloensis (Colla) H. Friedrich 8c G. D. Rowley

1974 cact0, quisc0

Cactus chiloensis Colla 1826, Cereus chiloensis (Colla) A. P. de Can-dolle 1828, Trichocereus chiloensis (Colla) Britton & Rose 1920

Plants treelike, branching basally or nearly so, first at right angles, then erect, to 8 m (26 ft) high. Stems stout, cylindrical, 10-12 cm (3.9-4.7 in) in diameter. Ribs usually 16-17, low, broad, distinctly tuberculate. Spines pale yellow, later gray, with brown tips. Central spine one, straight, erect, 4-7 cm (1.6-2.8 in) or more long. Radial spines 8-12, 1-2 cm (0.4-0.8 in) or more long. Flowers open during the day, white, to 14 cm (5.5 in) long. Fruits globose, green. Distribution: Chile. Some concern has been expressed among conservationists that the extensive collecting of dead stems of Echinopsis chiloensis for the construction of rain sticks (Chapter 2, under Other Uses of Cacti) might hurt populations of the plants. I have observed that some populations near towns and villages may be slightly affected but that there does not seem to be a significant threat to the species.

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