Original Description:The Cactaceae 1
p.202 - Britton & Rose (1920)
Plant often 3 meters high, sometimes even 5, but often low; trunk sometimes 9 cm in diameter, sometimes with brown, smooth bark, but usually very spiny; branches numerous, usually erect, at times forming a compact, almost globular top, at other times quite open; joints unusually thin and narrow, 1 to 1.5 dm long, generally erect, very spiny; leaves subulate, minute, 3 to 4 mm long, green with reddish tips, found only on very young joints; areoles filled with white wool; spines usually 1 to 4, sometimes 6, from an areole, all yellow at first, in age white, the largest one porrect, 3 cm long; petals erect; filaments orange colored; style cream colored; stigma-lobes white; ovary broadly turbinate, 2 cm long, tuberculate; fruit small.
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