. Carnegie Institution of Washington publication. 20 THE CACTACEAE- More or less cespitose, rather dark green, decumbent or ascending, 5 to 30 cm. long, 2 to 4 cm. in diameter; ribs 6 to 10, prominent, strongly tubercled; radial spines acicular, spreading, about 7, white to yellowish, 1 cm. long or less; central spine solitary, acicular, porrect, 12 mm. long or more; flowers large, 10 to 12 cm. broad, yellow with a reddish center, with rather few perianth-segments 4 to 6 cm. long, oblong-spatulate, acuminate, more or less serrate; scales on ovary red, spreading; fruit not known. Type locality:
. Carnegie Institution of Washington publication. 20 THE CACTACEAE- More or less cespitose, rather dark green, decumbent or ascending, 5 to 30 cm. long, 2 to 4 cm. in diameter; ribs 6 to 10, prominent, strongly tubercled; radial spines acicular, spreading, about 7, white to yellowish, 1 cm. long or less; central spine solitary, acicular, porrect, 12 mm. long or more; flowers large, 10 to 12 cm. broad, yellow with a reddish center, with rather few perianth-segments 4 to 6 cm. long, oblong-spatulate, acuminate, more or less serrate; scales on ovary red, spreading; fruit not known. Type locality: Not cited. Distribution: Western Texas. Although this species is supposed to come from the vicinity of San Antonio, Texas, no specimens are known to us from that place but we have an herbarium specimen collected by Miss Mary B. Croft at San Diego, Texas. It is one of the few species in the genus with yellow flowers and ought easily to be distinguished from other Texan species. Illustration: Bluhende Kakteen 2: pi. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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