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{{Inc|
Echinopsis (Greek, hedgehog-like). Cactacea: Sea-urchin Cactus. South American small condensed cacti.
Stems spherical to ellipsoidal or rarely columnar: ribs prominent and usually sharp-angled: fls. usually long trumpet-shaped; ovary and tube covered with linear-lanceolate, cuspidate bracts which become longer toward the outer end of the tube, where they pass gradually into the outer petals, in their axils bearing long, silky, wavy hairs and usually a few rather rigid bristles.—This is a well-marked genus of about 18 species, although by some authors combined with Cereus. Cult. as for Echinocactus; see also Succulents.
Only a few species of Echinopsis are grown in this country, although they are more easily grown and propagated than most of the United States species of cacti. The genus is well adapted for use as window plants.
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