Ferocactus flavovirens Scheidweiler

Echinocactus flavovirens Scheidweiler, Allg. Gartenz. 9: 50. 1841.

Plant cespitose, forming great masses, pale green, 3 to 4 dm. high; stems 1 to 2 dm. in diameter; ribs 13, rarely 11 or 12, 1 to 2 cm. high, acute, somewhat sinuate; areoles 2 cm. apart, large, grayish, woolly; spines pale brown, becoming gray in age, long and stout; centrals , much longer than the radials, somewhat unequal, the longer ones 5 to 8 cm. long; flowers and fruit not seen; flower-buds globular, covered with long linear imbricating scales, their margins with long ciliate hairs.

Type locality: Tehuacan, Mexico.

Distribution: Known only from about Tehuacan, Puebla, Mexico.

This species was introduced into cultivation from the type locality by Dr. Rose in 1906 but it has never flowered. It grows with F. robustus and may easily be mistaken for it, but the color of the stems, number of ribs, and color of spines are quite different.

Here is referred Echinocactus polyocentrus Lemaire (Salm-Dyck, Cact. Hort. Dyck. 1844. 22. 1845), but unpublished.

The Index Kewensis refers E. flavovirens to E. orthacanthus Link and Otto (Verh. Ver. Beförd. Gartenb. 3: 427. 1827; Melocactus orthacanthus Link and Otto, Verh. Ver. Beförd. Gartenb. 3: pl. 18. 1827), a much earlier name, but the description suggests a very different plant, with 17 ribs and one stout central spine. The original description states definitely that it comes from Montevideo, but the Index Kewensis refers it to Mexico.

Illustrations: MacDougal, Bot. N. Amer. Des. pl. 18; Nat. Geogr. Mag. 21: 700, as Echi-nocactus flavescens.

Plate xiii, figure 1, is from a photograph taken by Dr. MacDougal near Esperanza, Puebla, in 1900.

Continue reading here: Ferocactus melocactiformis De Candolle

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