Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.



Annual to tree
Leaves simple to pinnately to palmately compound, generally alternate; stipules free to fused, persistent to deciduous
Inflorescence: cyme, raceme, panicle, or flowers solitary
Flower generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, often with bractlets alternate with sepals; sepals generally 5; petals generally 5, free; stamens (0)5–many, pistils (0)1–many, simple or compound; ovary superior to inferior, styles 1–5
Fruit: achene, follicle, drupe, pome, or blackberry- to raspberry-like
Seeds generally 1–5
Genera in family: 110 genera, ± 3000 species: worldwide, especially temp. Many cultivated for ornamental and fruit, especially Cotoneaster , Fragaria , Malus , Prunus , Pyracantha, Rosa , and Rubus
Reference: [Robertson 1974 J Arnold Arbor 55:303–332,344–401,611–662]
Family description, key to genera by Barbara Ertter and Dieter H. Wilken.



Dieter H. Wilken

Shrub or small tree
Stem: bark gray- to red-brown; twigs generally short
Leaves alternate or clustered, simple, deciduous; stipules deciduous
Inflorescence: racemes or clusters; flowers 3–16+
Flower: hypanthium bell- to urn-shaped; sepals persistent; petals ascending to erect, white; stamens ± 10–20; ovary inferior, 2–5-chambered, styles 2–5
Fruit: pome, berry-like, generally spheric, blue-black
Species in genus: ± 10 species: temp North America, Eurasia, n Africa. Fr of some species used by native Americans for food
Etymology: (Latin: from old French common name)
Reference: [Jones 1946 Illinois Biol Mongr 20(2):1–126]
Variation in w North America needs further study.


A. alnifolia (Nutt.) Nutt.

Shrub 1–8 m
Stem: twigs glabrous to tomentose
Leaf: blade 9–50 mm, 8–45 mm wide, elliptic to round, generally serrate above middle
Flower: petals 3–4 mm wide, oblong to oblanceolate; styles (4)5
Fruit 7–14 mm diam
Ecology: Open scrub, coniferous forest
Elevation: 50–2600 m.
Bioregional distribution: North Coast, Klamath Ranges, n Outer North Coast Ranges, n&c High Sierra Nevada (e slope)
Distribution outside California: to Alaska, north-central US, New Mexico
3–4 other vars. in nw US, Rocky Mtns.


var. pumila (Nutt.) A. Nelson

Shrub 1–4 m
Leaf: blade 9–50 mm, 8–45 mm wide, glabrous, lateral veins 12–18
Inflorescence 1–5 cm; flowers 3–9
Flower: petals 6–12 mm; ovary top glabrous
Fruit 7–10 mm diam
Ecology: Open, often moist scrub, coniferous forest
Elevation: 1400–2600 m.
Bioregional distribution: n&c High Sierra Nevada (eastern slope)
Distribution outside California: to Montana, Colorado
Synonyms: A. pumila Nutt
Horticultural information: DRN: 4, 5, 6 &IRR: 1, 2, 7, 14, 15, 16, 17 &SHD: 3, 8, 9, 10, 18, 19, 20, 21.

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bioregional map for AMELANCHIER%20alnifolia%20var.%20pumila 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 Amelanchier alnifolia var. pumila
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