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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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ERICACEAE

HEATH FAMILY

Gary D. Wallace, except as specified

Perennial, shrub, tree
Stem: bark often peeling distinctively
Leaves simple, generally cauline, alternate, opposite, rarely whorled, evergreen or deciduous, often leathery, petioled or not; stipules 0
Inflorescence: raceme, panicle, cyme, or flowers solitary, generally bracted; pedicels often with 2 bractlets
Flower generally bisexual, generally radial; sepals generally 4–5, generally free; petals generally 4–5, free or fused; stamens 8–10, free, filaments rarely appendaged, anthers awned or not, dehiscent by pores or slits; nectary generally at ovary base, disk-like; ovary superior or inferior, chambers generally 1–5, placentas axile or parietal, ovules 1–many per chamber, style 1, stigma head- to funnel-like or lobed
Fruit: capsule, drupe, berry
Seeds generally many, sometimes winged
Genera in family: ± 100 genera, 3000 species: generally worldwide except deserts; some cultivated, especially Arbutus, Arctostaphylos, Rhododendron, Vaccinium
Reference: [Wallace 1975 Wasmann J Biol 33:1–88; 1975 Bot Not 128:286–298]
Subfamilies Monotropoideae, Pyroloideae, Vaccinioideae sometimes treated as families. Nongreen plants obtain nutrition from green plants through fungal intermediates.

ARBUTUS

MADRONE

Shrub, tree, glabrous to hairy, burled or not
Stem erect; bark smooth at first, then shredding or fissured
Leaves alternate, evergreen, leathery
Inflorescence: panicle, bracted; bractlets 2
Flower: sepals 5, fused at base; petals 5, fused, urn-shaped; stamens 10, anthers dehiscent by short separate gaping slits, awns elongate; ovary superior, papillate, chambers 5
Fruit: berry
Seeds few per chamber, large
Species in genus: 20 species: North America, C.Am, w Eur, Medit, w Asia
Etymology: (Latin: name for A. unedo , strawberry tree)

Native

A. menziesii Pursh

PACIFIC MADRONE


Stem < 40 m; bark reddish; twigs stout
Leaf: blade < 12 cm, ovate to oblong, glabrous, rounded to pointed at tip, entire to minutely serrate, upper surface bright green, lower surface whitish
Flower < 8 mm; corolla yellowish white or pinkish
Fruit < 12 mm wide, spheric, orange-red, papillate
Chromosomes: 2n=26
Ecology: Coniferous, oak forests
Elevation: 100–1500 m.
Bioregional distribution: Northwestern California, High Cascade Range, n&c High Sierra Nevada, Central Western California, n Channel Islands (Santa Cruz Island), Western Transverse Ranges, San Gabriel Mountains, Peninsular Ranges
Distribution outside California: to British Columbia, Baja California
Horticultural information: DRN, DRY, SUN: 4, 5, 6, 15, 16, 17; DRN, IRR: 3, 7, 15, 24 &SHD: 9, 14, 18, 23; DFCLT.

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bioregional map for ARBUTUS%20menziesii being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Arbutus menziesii
Retrieve dichotomous key for Arbutus
Overlay Consortium of California Herbaria specimen data by county on this map
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