Erdisia spiniflora Philippi

Opuntia spiniflora Philippi, Linnaea 30: 211. 1859. Opuntia bicolor Philippi, Linnaea 33: 83. 1864.

Opuntia clavata Philippi, Anal. Univ. Chile 41: 722. 1872. Not Engelmann, 1848. Cereus hypogaeus Weber in Regel, Gartenflora 31: 165. 1882. Echinocereus hypogaeus Rümpler in Förster, Handb. Cact. ed. 2. 784. 1885. Eulychnia clavata Philippi in Engler and Prantl, Pflanzenfam. 36a: 185. 1894, as synonym. Echinocereus clavatus Schumann, Monatsschr. Kakteenk. 5: 123. 1895.

Underground stems slender, spineless, branching near the surface of the ground; branches somewhat clavate, becoming bronzed, 6-ribbed; spines all black at base, brown at tip; radial spines about 6, acicular, central spine solitary, porrect, slender; flowers probably purplish, 5 to 6 cm. long, with a rather broad throat; fruit fleshy, spiny; seeds not known.

Type locality: Near Aranas, Santiago, Chile.

Distribution: High mountains of Chile, near Santiago.

This species has been described under four specific names, and has been referred to four genera. We refer it to Erdisia on account of floral similarity to E. squarrosa.

Illustrations: Gartenflora 21: pl. 721, f. 3, as Opuntia clavata; Gartenflora 31: pl. 1085, as Cereus hypogaeus.

Figure 157 is a copy of the first illustration above cited.

PUBLISHED SPECIES, PERHAPS OF THIS GENUS. Cereus apiciplorus Vaupel, Bot. Jahrb. Engler 50: Beibl. 111: 15. 1913.

Prostrate or ascending, the stems 2 to 2.5 cm. thick, about 10, spreading; central spine solitary, 2 to 3 times as long as the radials; flowers numerous, forming a crest at the top of the plant, 4 cm. long; ovary terete, 1 cm. long, covered with numerous small lanceolate scales bearing brown felt and reddish-brown bristles in their axils.

Type locality: Valley of Puccha River, Department of Ancachs, Peru.

The author compares the flowers of this plant with those of Cereus aureus Meyen.

14. BERGEROCACTUS Britton and Rose, Contr. U. S. Nat. Herb. 12: 435. 1909.

Low, much branched cactus, with stout, cylindric, spreading or ascending branches; ribs many, low; areoles approximate; spines many, yellow, acicular; flower small, pale yellow, with short tube and widely expanded limb; scales on ovary and flower-tube small, bearing felt and spines in their axils; perianth-segments small, obtuse; fruit globose, densely spiny; seeds obovate.

Fig. 158.—Bergerocactus emoryi.

The genus is monotypic; it is named in honor of Alwin Berger, author of an excellent discussion of the genus Cereus, who was long in charge of the garden of Sir Thomas Han-bury at La Mortola, Italy.

1. Bergerocactus emoryi (Engelmann) Britton and Rose, Contr. U. S. Nat. Herb. 12: 435,* 474.

1909.

Cereus emoryi Engelmann, Amer. Journ. Sci. II. 14: 338. 1852.

Echinocereus emoryi Rümpler in Förster, Handb. Cact. ed. 2. 804. 1885.

Branches 2 to 6 dm. long, 3 to 6 cm. in diameter, entirely covered with the dense spiny, armament; ribs 20 to 25, very low, only a few millimeters high, somewhat tuberculate; spines 10 to 30, yellow to yellowish brown, acicular, 1 to 4 cm. long; flowers about 2 cm. long and about as broad when expanded; outer perianth-segments obovate, obtuse; inner perianth-segments oblong, about 1 cm. long.

Type locality: "About the boundary line" of California and Lower California.

Distribution: Near the coast of southwestern California and northwestern Lower California and adjacent islands.

Illustration: Engelmann, Cact. Mex. Bound. pl. 60, f. 1 to 4, as Cereus emoryi.

Figure 158 is from a photograph taken by E. O. Wooton on San Clemente Island, California, in 1912; figure 159 shows a dried flower collected by Le Roy Abrams at Tia Juana, San Diego County, California, in 1903.

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