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    Vascular Plants of California
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Holodiscus discolor var. discolor

Higher Taxonomy
Family: RosaceaeView DescriptionDichotomous Key

Common Name: ROSE FAMILY
Habit: Annual to tree, glandular or not. Leaf: simple to palmately or pinnately compound, generally alternate; stipules free to fused (0), persistent to deciduous. Inflorescence: cyme, raceme, panicle, cluster, or flowers 1; bractlets on pedicel ("pedicel bractlets") generally 0--3(many), subtended by bract or generally not. Flower: generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, subtending bractlets ("hypanthium bractlets") 0--5, alternate sepals; sepals generally 5; petals generally 5, free; stamens (0,1)5--many, anther pollen sacs generally 2; pistils (0)1--many, simple or compound, ovary superior to inferior, styles 1--5. Fruit: 1--many per flower, achene (fleshy-coated or not), follicle, drupe, or pome with generally papery core, occasionally drupe-like with 1--5 stones. Seed: generally 1--5 (per fruit, not per flower).
Genera In Family: 110 genera, +- 3000 species: worldwide, especially temperate; many cultivated for ornamental, fruit, especially Cotoneaster, Fragaria, Malus, Prunus, Pyracantha, Rosa, Rubus. Note: Number of teeth is per leaf or leaflet, not per side of leaf or leaflet, except in Drymocallis.
eFlora Treatment Author: Daniel Potter & Barbara Ertter, family description, key to genera, treatment of genera by Daniel Potter, except as noted
Scientific Editor: Daniel Potter, Thomas J. Rosatti.
Genus: HolodiscusView Description 

Habit: Shrub, +- hairy. Leaf: simple, alternate, toothed; stipules 0. Inflorescence: raceme or panicle, terminal, many-flowered, persistent; pedicels slender, bractlets 1--3, linear. Flower: hypanthium saucer-shaped, prominent nectary-disk below inner rim, bractlets 0; petals generally white; stamens 15--20; pistils 5, ovaries superior, 2-ovuled, hairs dense, bristle-like, persistent in fruit, style persistent, stigma +- 2-lobed. Fruit: achenes 5.
Species In Genus: 3--5 species: western North America, Central America, northern South America. Etymology: (Greek: whole disk)
eFlora Treatment Author: Daniel Potter
Species: Holodiscus discolorView Description 

Habit: Plant 0.3--6 m. Stem: bark +- red, in age gray, shredding; twigs glabrous to hairy, occasionally glandular. Leaf: 0.3--8 cm, ovate to obovate, strong-veined abaxially, glabrous to hairy, occasionally glandular, teeth entire to compound; base truncate to wedge-shaped; petiole distinct or not. Inflorescence: 2--25 cm, 1.5--25 cm wide. Flower: hypanthium 3--5 mm wide; sepals 1--2 mm; petals 1.5--2 mm; style 1 mm. Fruit: achenes 1--1.5 mm, often with sessile glands.
Note: Highly variable; varieties intergrade.
Unabridged Note: Highly variable; varieties intergrade, especially. var. discolor and var. microphyllus. Intermediate plants from SNH, SNE, described as Holodiscus saxicola A. Heller, Holodiscus boursieri (Carrière) Rehder, do not merit taxonomic status.

Holodiscus discolor (Pursh) Maxim. var. discolor
Habit: Plant 1.5--6 m, +- open. Stem: twigs hairy, glands 0. Leaf: petiole 2--15 mm; blade 1.5--8 cm, ovate to elliptic, hairs sparse adaxially, dense abaxially, teeth toothed, base generally truncate to rounded. Inflorescence: 5--25 cm, 5--25 cm wide; branches generally many.
Ecology: Moist woodland edges, rocky slopes; Elevation: < 3200 m. Bioregional Distribution: NW, SNH, GV (Sutter Buttes), CW, ChI, WTR, SnGb (300--1300 m), PR; Distribution Outside California: to British Columbia, Montana, Colorado, Texas, Mexico. Flowering Time: May--Aug
eFlora Treatment Author: Daniel Potter
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botanical illustration including Holodiscus discolor var. discolor


Citation for this treatment: Daniel Potter 2012, Holodiscus discolor var. discolor, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on July 23, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on July 23, 2018.

Holodiscus discolor var. discolor
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© 2009 Keir Morse
Holodiscus discolor var. discolor
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© 2008 Keir Morse
Holodiscus discolor var. discolor
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© 2015 Barry Breckling
Holodiscus discolor var. discolor
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© 2016 Barry Breckling
Holodiscus discolor var. discolor
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© 2010 James M. Andre
Holodiscus discolor var. discolor
click for enlargement
© 2017 Keir Morse

More photos of Holodiscus discolor var. discolor in CalPhotos

Geographic subdivisions for Holodiscus discolor var. discolor:
NW, SNH, GV (Sutter Buttes), CW, ChI, WTR, SnGb (300--1300 m), PR;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.