Sclerocactus parviflorus

Clover & Jotter

Bull. Torrey Bot. Club 68: 419, fig. 8. 1941.

Common names: Devil’s-claw cactus small flower fishhook cactus
Synonyms: Echinocactus parviflorus (Clover & Jotter) L. D. Benson Echinocactus parviflorus var. havasupaiensis (Clover) L. D. Benson Echinocactus parviflorus var. roseus (Clover) L. D. Benson Ferocactus parviflorus K. D. Heil Pediocactus parviflorus Clover Sclerocactus contortus Peebles Sclerocactus havasupaiensis var. roseus Clover Sclerocactus intermedius (Engelmann & J. M. Bigelow) Britton & Rose Sclerocactus parviflorus subsp. havasupaiensis (Clover) Hochstätter Sclerocactus parviflorus var. intermedius (Peebles) D. Woodruff & L. D. Benson Sclerocactus parviflorus subsp. terrae-canyonae (K. D. Heil) K. D. Heil & J. M. Porter Sclerocactus terrae-canyonae Sclerocactus whipplei var. intermedius (Peebles) L. D. Benson Sclerocactus whipplei var. roseus (Clover) L. D. Benson
Treatment appears in FNA Volume 4. Treatment on page 202. Mentioned on page 199, 200, 201, 203, 205.

Stems unbranched or branched near base, depressed-spheric, spheric, cylindric, or elongate-cylindric, 4.5–45 × 3.5–14.5 cm; ribs (10–)13(–16), tubercles evident on ribs. Spines frequently obscuring stems; radial spines 8–17 per areole, usually white, sometimes brown or purplish pink, 6–36 mm; central spines (3–)4–6(–8) per areole, 1–5 hooked; abaxial central spine usually purple black, hooked, 15–72 × 0.6–1 mm; lateral spines 2–6 per areole, similar to abaxial, usually shorter, usually not hooked; adaxial central spine usually white (rarely gray, straw colored, pink, or reddish brown), flat to angled or terete; straight (rarely contorted), 17–82(–90) × 0.7–1.5(–3) mm. Flowers funnelform to campanulate, (2–)3–5.7(–7) × 2.5–5.5(–8) cm; outer tepals with greenish or brownish purple midstripes and rose to purple, pink, yellow, or white margins, oblanceolate, 25–50 × 6–10 mm, mucronate, margins entire; inner tepals rose to purple, pink, or yellow (rarely white), oblanceolate, 15–55 × 6–12 mm, margins entire to fringed, apex mucronate; filaments purple, yellow, or green; anthers yellow; ovary papillate, appearing granular. Fruits irregularly dehiscent, green turning reddish pink, 10–30 × 10–15 mm; scales few, membranous fringed. Seeds dark brown to black, 2.5–3.5 × 1.5–3 mm; testa with rounded papillae.

Phenology: Flowering late Apr–May.
Habitat: Sandy, gravelly, or clay hills, mesas, and washes, desert grasslands or saltbush, sagebrush, rabbitbrush, and blackbrush communities, pinyon-juniper woodlands
Elevation: 1000-2100 m


V4 377-distribution-map.gif

Ariz., Colo., N.Mex., Utah.


Sclerocactus parviflorus has an extensive range and great morphologic variation. Many named segregates have been proposed (L. D. Benson 1982; K. D. Heil and J. M. Porter 1994; F. Hochstätter 1995b) and some of these clearly merit recognition at the subspecific or varietal level. However, we are not attempting to subdivide this very complex group. Considerable work remains in understanding morphologic diversification within this species.

Selected References


Lower Taxa

... more about "Sclerocactus parviflorus"
Kenneth D. Heil +  and J. Mark Porter +
Clover & Jotter +
Devil’s-claw cactus +  and small flower fishhook cactus +
Ariz. +, Colo. +, N.Mex. +  and Utah. +
1000-2100 m +
Sandy, gravelly, or clay hills, mesas, and washes, desert grasslands or saltbush, sagebrush, rabbitbrush, and blackbrush communities, pinyon-juniper woodlands +
Flowering late Apr–May. +
Bull. Torrey Bot. Club +
Echinocactus parviflorus +, Echinocactus parviflorus var. havasupaiensis +, Echinocactus parviflorus var. roseus +, Ferocactus parviflorus +, Pediocactus parviflorus +, Sclerocactus contortus +, Sclerocactus havasupaiensis var. roseus +, Sclerocactus intermedius +, Sclerocactus parviflorus subsp. havasupaiensis +, Sclerocactus parviflorus var. intermedius +, Sclerocactus parviflorus subsp. terrae-canyonae +, Sclerocactus terrae-canyonae +, Sclerocactus whipplei var. intermedius +  and Sclerocactus whipplei var. roseus +
Sclerocactus parviflorus +
Sclerocactus +
species +