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Ferocactus viridescens
SAN DIEGO BARREL CACTUS

Higher Taxonomy
Family: CactaceaeView DescriptionDichotomous Key

Common Name: CACTUS FAMILY
Habit: Perennial herb, shrub, tree, generally fleshy. Stem: cylindric to spheric, or flat; surface smooth, tubercled, or ribbed (grooved); nodal areoles bearing flowers. Leaf: generally 0 or early-deciduous, flat to +- cylindric. Spines: areoles generally with central, radial spines, occasionally with glochids. Flower: generally 1 per areole, bisexual [unisexual], sessile, radial [bilateral]; perianth parts generally many [5], scale-like to petal-like; stamens many; ovary inferior [superior], style 1, stigma lobes generally several [many]. Fruit: dry to fleshy or juicy, indehiscent to variously dehiscent, spiny, scaly, or naked; tubercled or smooth. Seed: generally many, occasionally 0--few.
Genera In Family: +- 125 genera, +- 1800 species: America (especially deserts), Africa; many cultivated, some edible. Note: Spines smaller, fewer (0) in shade forms; yellow spines blacken in age. Introduced species increasingly escape cultivation. Hybridization common in some genera. Taxa of Escobaria in TJM (1993) moved to Coryphantha.
eFlora Treatment Author: Bruce D. Parfitt, except as noted
Scientific Editor: Bruce D. Parfitt, Douglas H. Goldman, Bruce G. Baldwin, Thomas J. Rosatti.
Genus: FerocactusView DescriptionDichotomous Key

Common Name: BARREL CACTUS
Habit: Erect or leaning, branches 0, occasionally branched from tip-injury. Stem: (0)10--200(300) cm, 10--35 cm diam, depressed-spheric to short-columnar, hard, glabrous, not segmented; ribs 13--31, prominent; tubercles not conspicuous on ribs. Spines: [6]10--32 per areole, 2--4.5 mm wide, generally awl-shaped, generally flat, ringed with conspicuous ridges, straight to curved or +- hooked, some bristle-like; central spines generally 4 per areole. Flower: +- terminal, near distal edge of spine cluster, 3--6 cm diam; perianth yellow to red [or purple, or white with +- purple midstripes]; ovary glabrous, spines 0, scales numerous, generally rounded, margins minutely fringed or toothed. Fruit: spheric, ovoid, or cylindric, glabrous, spineless, dehiscent by basal pore. Seed: [1]1.5--3 mm, spheric to subreniform, pitted, black.
Species In Genus: 25 species: southwestern United States, Mexico. Etymology: (Latin: fierce cactus)

Ferocactus viridescens (Torr. & A. Gray) Britton & Rose
NATIVE
Stem: generally not taller than wide, depressed-spheric to cylindric. Spines: 10--24, generally spreading, longest straight or +- curved, red, pink or +- yellow, +- gray or yellow in age. Flower: inner perianth occasionally with red-brown midstripes; style 6--9 mm, ovary 5--7 mm, scales fringed-dentate. Fruit: yellow (to +- red). Seed: 1.5--2 mm. Chromosomes: 2n=22.
Ecology: Sandy to rocky areas; Elevation: 10--150 m. Bioregional Distribution: SCo (San Diego Co.); Distribution Outside California: Baja California. Flowering Time: May--Jun Note: Threatened by urbanization, off-road vehicles, collecting.
Synonyms: Ferocactus viridescens var. viridescens
eFlora Treatment Author: Bruce D. Parfitt
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Ferocactus cylindraceus
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botanical illustration including Ferocactus viridescens

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Citation for this treatment: Bruce D. Parfitt 2016. Ferocactus viridescens, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=25772, accessed on February 10, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 10, 2016.


Ferocactus viridescens
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© 2013 Keir Morse
Ferocactus viridescens
click for enlargement
© 2013 Keir Morse
Ferocactus viridescens
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© 2014 Barry Rice
Ferocactus viridescens
click for enlargement
© 2013 Keir Morse
Ferocactus viridescens
click for enlargement
© 2013 Keir Morse
Ferocactus viridescens
click for enlargement
© 2013 Keir Morse

More photos of Ferocactus viridescens in CalPhotos


Geographic subdivisions for Ferocactus viridescens:
SCo (San Diego Co.);
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.