Arctostaphylos glutinosa
status box

threatened

Photo taken at the “Chalks” © 2006 by Dylan Neubauer

Photo taken at the “Chalks” © 2006 by Dylan Neubauer

Photo taken at the “Chalks” © 2006 by Dylan Neubauer

Photo taken at the “Chalks” © 2006 by Dylan Neubauer

Photo taken at the “Chalks” © 2006 by Dylan Neubauer

Photo taken at the “Chalks” © 2006 by Dylan Neubauer

A red polygon indicates an extant occurrence

A red polygon indicates an extant occurrence


This fact sheet was prepared by Grey F. Hayes and Dean W. Taylor under award NA04N0S4200074 from the National Oceanic and Atmospheric Administration (NOAA), U.S. Department of Commerce (DOC). The statements, findings, conclusions, and recommendations are those of the authors and do not necessarily reflect the views of the NOAA or the DOC.

© Copyright 2006, Elkhorn Slough Coastal Training Program

Last updated: Jun 14, 2007 11:47

Common Names - Schreiber's Manzanita

Family - Ericaceae (Heath Family)

State Status - none

Federal Status - none

Habitat

Diatomaceous shale, marine sandstone and limestone “chalk” ridges on the immediate coast; in stands of mixed manzanitas with knobcone pine (Pinus attenuata); and in Monterey pine (Pinus radiata) forests.

Key Characteristics

Erect shrub to ca. 2 m tall; basal burl absent; twigs with three trichome types: tomentose hairs, longer bristly-white trichomes, and glandular trichomes; leaves grayish, sessile, and clasping, strongly imbricate, isofacial, canescent, and glaucous; lower inflorescence bracts foliaceous; inflorescence 2–4 branched; pedicels finely glandular-bristly; berries densely bristly as well as with red, glandular trichomes.

Flowering Period

November to April (can be identified year-round)

Reference Population

The “Chalks” (Lockheed)

Global Distribution

Endemic to the maritime side of the Santa Cruz Mountains of California

Conservation

Could been confused with A. regisimontana, A. pallida, and A. pajaroensis, which are similar in general aspect but geographically separated (reports from Santa Clara and San Mateo counties are one of these species misapplied), or A. andersonii, which occurs within its range and intergrades with it. A green-leaved, glabrous form occurs infrequently throughout populations of A. glutinosa, which botanist Jim West believes is a recessive byproduct of A. glutinosa’s hybrid ancestry (A. canescens x A. andersonii). Susceptible to fungal die-back in residential areas exacerbated by landscape irrigation. Reproduces only from seed (does not stump-sprout) and requires mineral soil for germination. Declining due to fire-suppression. Large proportion of known range is impacted by roads and industrial activity at Lockheed.  Extent of distribution requires field surveys. Reports from Eagle Rock may be misidentified.
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Reference

West, J. Personal communication (August 9, 2007).

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