Ferocactus emoryi
biznaga-barril de Emory, Coville's barrel cactus, Emory's barrel cactus
erect, spheric to ovoid-cylindric, 30–90(–250) × 30–60(–100) cm;
ribs (15–)21–32, shallowly notched immediately above each areole.
6–10 per areole, reddish, reddish gray, or horn colored, all robust and rigid, more than 1 mm diam.;
central spine 1, curved (hooked only on relatively young plants), annulate, thick, adaxially flat, 55–95(–130) × 2.5–4 mm.
reddish outside, brilliant red inside, 6–7.5 × 5–7.5 cm;
inner tepals brilliant red [yellow];
stigma lobes brilliant red.
± readily dehiscent through basal pore, bright yellow, 25–50 × 25–35 mm, leathery or fleshy, locule dry, hollow except for seeds.
2 mm, pitted.
= 22.
Ferocactus emoryi
Ferocactus emoryi has a confused taxonomic history. The name is based on Echinocactus emoryi, which was published twice by Engelmann, each involving a different species. Engelmann’s first use of E. emoryi [in W. H. Emory]—applied to a population of Ferocactus wislizeni in eastern Arizona—is rejected as provisional and therefore invalid. However, Engelmann’s second use of E. emoryi was a valid publication, and it unambigously pertains to the species in southwestern Arizona that Britton and Rose unncecessarily renamed as Ferocactus covillei.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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