Navajo pincushion cactus
[Pediocactus peeblesianus subsp. fickeiseniae (Backeberg ex Hochstätter) Lüthy, Kakteen And. Sukk.]
Plants branched or un-branched, brances 1-4. Stems 2.5-6.5 × 2-5.5 cm. Spines usually radial and central (rarely all radial); radial spines 6-7 per areole, 3-7 × 0.3-0.5 mm; central spine usually 1 per areole, straight to strongly curved, 5-18 × 1 mm. Flowering spring. Gravelly soils of alkaline desert scrub and desert grasslands; 1200-1600 m; Ariz. Although endemic to northern Arizona, Pediocactus peeblesianus subsp. fickeiseniae is much more widespread than subsp. peeblesianus. 'Pediocactus peeblesianus var. fickeiseniae L. D. Benson' was not validly published.
STEMS: 2.5-6 cm long, 2-5 cm in diameter. SPINES: central spines 1, 0.5-1.8 cm long, mostly 1 mm wide at the base; peripheral (intermediate) spines 0; radial spines 4-7, 3-7 mm long, less than 0.5 mm in width. NOTES: See also parent taxon. Desertscrub and desert grasslands: endemic to Coconino, Mohave cos.; 1200 to 1500 m (4000-5000 ft); Apr-May. REFERENCES: Heil, Kenneth D., and Mark J. Porter. 2001. Cactaceae. J. Ariz. - Nev. Acad. Sci. Volume 33(1)