Ferocactus acanthodes var. johnstonianus
Grossen Kugelkakteen Nordamerikas 132 (1992)
Family
Cactaceae
Genus
Species
Ferocactus acanthodes var. johnstonianus
Author
(Britton & Rose) G.Unger
Chinese genus
强刺球属
Chinese name
-
Primary
Accepted
DescriptionEdit description
Seeds
About 2 mm, black, shining, angled, pitted, with a small white depressed hylum.
Description
Densely spined ,usually solitary, barrel cactus.
Note
This species might be a population of Ferocactus cylindraceous, but it may also be a genetic link between Ferocactus cylindraceusSN|10102]]SN|10102]] and Ferocactus wislizeni.
Flowers
5cm long and 3,5 cm broad, tepals narrow, yellowish, or the outer ones reddish, short-accuminate, the margins slightly erose. Filaments yellowish below and gradually reddening toward the tip. Stigma flesh colored, with 8-13 lobes. Scales on the tube orbicular.
Spines
Very numerous (about 22 to 25), 5-7 cm long, and fine (1,2 mm thick) initially golden-yellow (or sometimes reddish on the newest growth), becoming brownish as they age. Radials and centrals are very much alike, none hooked (or vaguely hooked in juvenile specimens), annulate, slightly spreading and more or less outwardly recurved. They are interlaced and cover the body nearly completely.
Ribs
24-35, up to 2 cm high, margins slightly tuberculate and undulate .
Stem
Spherical to short-cylindrical. With adulthood the plant can reach 60-100 cm in height (but usually less) and about 30-35 cm in diameter.
Fruits
2,5-3 cm long and 1.5 cm broad or 5-6 cm long including the flowers remnants, opening by a large pore at the base.
Areoles
Elliptical, 2 cm long and 7 mm wide rather closely set. With small conical glands.