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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.

ARCTOSTAPHYLOS

MANZANITA

Philip V. Wells

Shrubs, small trees
Stem prostrate to erect; fire-resistant burl sometimes present at base; bark generally reddish, smooth or gray, rough, and shredded; hairs generally alike on twig, inflorescence axis, bract
Leaves alternate, spreading to ascending, evergreen; blade surfaces generally alike, sometimes convex, differing in color (stomata restricted to lower surface) or hairiness; margin flat to rolled
Inflorescence: raceme or panicle-like, terminal; branches raceme-like; flowers bracted; bracts leaf-like, generally flat or scale-like, generally folded, keeled; immature inflorescence present late summer through winter
Flower radial; sepals generally 5, free, persistent; corolla generally 5-lobed, urn-shaped to ± spheric, white to pink; stamens generally 10, included, filament base glabrous or hairy, anther 2-pored, awns 2, recurved; ovary superior, base surrounded by nectary disk, chambers 2–10, ovule 1 per chamber, style 1, stigma head-like
Fruit: drupe, berry-like, generally ± spheric; pulp generally thick, mealy; stones 2–10, free, separable, or strongly fused
Species in genus: ± 60 species: North America (especially CA) to C.Am, Eurasia
Etymology: (Greek: bear berries)
Reference: [Wells 1988 Madroño 35:330–341]
Observation of hairs requires 10X magnification. Distribution of many species local; hybridization occurs in areas of overlap
Horticultural information: Beautiful but mostly DFCLT due to fungus and often salinity and alkali. Avoid overhead watering in hot weather. CVS are the easier garden subjects.

Native

A. glandulosa Eastw.

Shrub 1–2.5 m; burl large, generally wide, ± flat-topped
Stems erect; twigs tomentose or short-bristly, glandular or not, sometimes with long, soft or stiff hairs
Leaves ascending or erect; petiole 5–10 mm; blade 2–4.5 cm, 1–2.5 cm wide, generally elliptic to ovate, base wedge-shaped to rounded, sometimes ± lobed or truncate, margin entire or toothed, surfaces alike, bright green to strongly glaucous, shiny or dull, glandular-puberulent to -bristly, papillate, scabrous, or puberulent to finely tomentose, or becoming glabrous, smooth
Inflorescence: branches 3–6, ± crowded; bracts generally 5–10 mm, leaf-like, upper bracts sometimes 3–5 mm, ± deltate or awl-like; lower bracts 8–15 mm, leaf-like, lanceolate to ± ovate; pedicel 3–10 mm, finely tomentose to short-glandular-bristly; immature axes 1–3 cm, ± crowded, not concealed by long bracts
Flower: ovary hairs generally like pedicel hairs
Fruit 6–10 mm wide, ± hairy, smooth or finely glandular-bristly, sticky
Ecology: Rocky outcrops, slopes, ridges
Elevation: < 2200 m.
Bioregional distribution: Klamath Ranges, North Coast Ranges, San Francisco Bay Area, Outer South Coast Ranges, Southwestern California (except Channel Islands)
Distribution outside California: sw Oregon, Baja California

Native

subsp. adamsii (Munz) Munz


Stem: twigs fine-tomentose or finely glandular-bristly
Leaf: blade white-glaucous, smooth, base rounded, sometimes ± lobed to truncate
Inflorescence: bracts generally 3–5 mm, deltate to ± awl-like, acuminate; lower bracts 5–12 mm, leaf-like; pedicel in fruit 5–10 mm
Flower: corolla pink
Ecology: Rocky outcrops, ridges, chaparral, coniferous forest
Elevation: 200–2200 m.
Bioregional distribution: e Peninsular Ranges
Distribution outside California: Baja California
Synonyms: var. adamsii Munz
Horticultural information: DRN, DRY, afternoon SHD: 16.

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bioregional map for ARCTOSTAPHYLOS%20glandulosa%20subsp.%20adamsii being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Arctostaphylos glandulosa subsp. adamsii
Retrieve dichotomous key for Arctostaphylos
Overlay Consortium of California Herbaria specimen data by county on this map
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