Overview

Distribution

Range Description

This species is reported from the Mexican state of Baja California and in the United States from the very southern part of the state of California (Hunt et al. 2006). It grows at altitudes from 100 to 1,000 m asl.
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National Distribution

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Global Range: Occurs in California.

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Calif.; Mexico (Baja California).
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Physical Description

Morphology

Description

Shrubs, ascending, with strict branches, 0.5-1.5 m. Stem segments firmly attached, green, (5-)10-26 × (1.7-)2.5-4.5 cm; tubercles prominent, narrowly elliptic to oval, often subribbed, (0.9-)1.3-2.6 cm; areoles elliptic to obdeltate, 4-7 × 2.5-5 mm; wool yellowish tan, aging gray. Spines 11-18(-28) per areole, at most areoles, moderately to wholly obscuring stems, spreading or erect, whitish, pale yellow to pinkish tan to reddish, aging brown or black, terete or abaxial spines basally flattened, grading in length, the longest porrect to reflexed, 2-2.5(-3.5) cm, with 0-6 bristlelike spines at areole margins; sheaths slightly baggy, whitish becoming yellow to golden apically. Glochids in thin adaxial crescent, yellow or tan to rusty, 0.5-6 mm. Flowers: inner tepals greenish yellow, often with tips reddish abaxially, spatulate, 22-30 mm, apiculate to emarginate-apiculate; filaments yellow-green to green; anthers yellow to orange-yellow; style cream to yellow, sometimes basally greenish; stigma lobes greenish cream, cream or yellow. Fruits yellowish, drying tan, globose, tuberculate, budlike with spines similar to those of stem segments but slightly shorter, often reflexed; proximal tubercles slightly elongated if fruits fertile; umbilicus 4-5 mm deep; areoles 22-32(-40). Seeds pale yellow, angular-suborbicular, flattened to slightly warped, 4.5-6 × 4.5-5.7 mm, sides with 3-5 depressions; girdle smooth, not protruding. 2n = 22.
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Diagnostic Description

Synonym

Opuntia acanthocarpa Engelmann & J. M. Bigelow subsp. ganderi C. B. Wolf, Occas. Pap. Rancho Santa Ana Bot. Gard. 2: 75, fig. 20. 1938; O. acanthocarpa var. ganderi (C. B. Wolf) L. D. Benson; O. ganderi (C. B. Wolf) Rebman & Pinkava
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Type Information

Isotype for Opuntia acanthocarpa subsp. ganderi C.B. Wolf
Catalog Number: US 3051218
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Pressed specimen
Collector(s): C. B. Wolf
Year Collected: 1938
Locality: San Diego, California, United States, North America
Elevation (m): 152 to 152
  • Isotype: Wolf, C. B. 1938. Occas. Pap. Rancho Santa Ana Bot. Gard. 1: 75.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species grows in sandy, gravelly to rocky substrates and on alluvial flats in desert scrubland and in oak woodland.

Systems
  • Terrestrial
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Comments: It occurs on sand and gravelly soils in the desert; 1000-3000 feet elevation (Benson 1969).

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Desert alluvial flats, bajadas, sandy, gravelly to rocky substrates; 100-1000m.
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Life History and Behavior

Cyclicity

Flowering/Fruiting

Flowering spring (Mar-May).
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2013

Assessor/s
Pinkava, D.J., Baker, M. & Puente, R.

Reviewer/s
Superina, M. & Goettsch, B.K.

Contributor/s

Justification
Cylidropuntia ganderi is a fairly widespread species that is locally common. The species has no major threats and is therefore listed as Least Concern.
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National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: GNR - Not Yet Ranked

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Population

Population
This species is locally abundant.

Population Trend
Stable
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Threats

Major Threats
There are no major threats to the species at present.
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Management

Conservation Actions

Conservation Actions
This species occurs in the Anza Borrego State Park (US), the San Pedro Martir National Park, and the Desierto del Vizcaíno Biosphere Reserve (both in Mexico).
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Notes

Comments

In the north part of its range, Cylindropuntia ganderi intergrades with C. californica var. parkeri.
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Names and Taxonomy

Taxonomy

Comments: Has been treated by some (e.g. Kartesz 1994, CITES) as a variety of Opuntia acanthocarpa (var. ganderi) but now treated as distinct.

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