Overview

Comprehensive Description

''Pellaea andromedifolia'' occurs in southern Oregon, California and Baja California. Within California it is found in the North Coast Ranges, Cascade Range Foothills, Sierra Nevada, central western California and southwestern California.

  • * Jepson Manual. 1993. ''Pellaea andromedifolia''. University of California, Berkeley, Ca. USA
  • * U.S.Department of Agriculture. 2010. ''Plants profile: Pellaea andromedifolia''
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Distribution

National Distribution

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Calif., Oreg.; Mexico in Baja California.
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Physical Description

Morphology

Description

Stems creeping, horizontal, slender, 2--4 mm diam.; scales mostly bicolored, narrowly lanceolate, largest scales 0.3--0.8 mm wide, centers black, thick, margins brown, thin, irregularly dentate. Leaves monomorphic, scattered along stem, 10--60 cm; croziers not conspicuously pubescent, densely scaly. Petiole straw-colored, tan, or gray, not lustrous, rounded or slightly flattened adaxially, without prominent articulation lines. Blade elongate-deltate, usually 3-pinnate proximally, 3--20 cm wide; rachis tan throughout, straight to slightly flexuous, rounded or flattened adaxially, glabrous or pubescent. Pinnae ascending or perpendicular to rachis, not decurrent on rachis, with 8--50 ultimate segments; costae usually straight, 15--140 mm, longer than ultimate segments. Ultimate segments elliptic to ovate, 3--15 mm, somewhat herbaceous, glabrous to sparsely pubescent abaxially; margins recurved on fertile segments, usually covering less than 1/2 abaxial surface, borders whitish, entire; apex retuse to rounded. Veins of ultimate segments evident. Sporangia short-stalked, containing 64 or 32 spores, not intermixed with farina-producing glands. 2 n = 58; n = 2 n = 87, 116, apogamous.
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Diagnostic Description

Synonym

Pteris andromedifolia Kaulfuss, Enum. Filic., 188. 1824; Pellaea andromedifolia var. pubescens D. C. Eaton
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Ecology

Habitat

Sporulating late spring--summer. Rocky slopes and ledges, usually on igneous substrates; 0--1500m.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Pellaea andromedifolia

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Pellaea andromedifolia

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

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Wikipedia

Pellaea andromedifolia

Pellaea andromedifolia, with the common name Coffee fern, is a species of cliff brake fern in the Cheilanthoideae subfamily of the Pteridaceae.[1] It is native to California in the United States and Baja California in Mexico.

Description[edit]

This plant does not have the immediately recognizable sharply pointed leaflets on its fronds that many other ferns have. Its leaves bear rounded or oval-shaped segments widely spaced along the rachis. Each segment may curl under along its edges. The leaves are green when new, then turn red, purplish, or brown.

Some individuals of this species are diploid and reproduce sexually, while some are triploid or tetraploid and reproduce by apogamy (growth of a plant from a gamete without fertilization).

Habitat[edit]

Pellaea andromedifolia is found on dry Western facing sunny banks, in coastal, Mojave Desert, and California chaparral and woodlands habitats. It is able to take long periods without water, when it will shrivel and appear dead. Then shortly after rainfall new growth appears quickly from the ground. It is not crown forming, but spreading slowly and forming clumps.

References[edit]

  1. ^ Christenhusz et al., 2011 Maarten J. M. Christenhusz, Xian-Chun Zhang & Herald Schneider: "A linear sequence of extant families and genera of lycophytes and ferns," Phytotaxa, 19: 7-54 (18 Feb. 2011)
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Notes

Comments

Pellaea andromedifolia comprises three cytotypes: a sexually reproducing diploid, an apogamous triploid, and an apogamous tetraploid. Isozyme studies by G. J. Gastony and L. D. Gottlieb (1985) suggested that the apogamous triploid is an autopolyploid derived from sexual diploid populations. The apogamous tetraploid apparently resulted from hybridization between diploid and triploid individuals. These cytotypes have not been formally recognized as subspecies because their ranges seem to overlap extensively and because the ploidy level of the type collection of P . andromedifolia is not known.
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