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Arctostaphylos canescens subsp. canescens

Higher Taxonomy
Family: EricaceaeView DescriptionDichotomous Key

Habit: Perennial herb, shrub, tree. Stem: bark often peeling distinctively. Leaf: simple or 0, generally cauline, alternate, opposite (whorled), evergreen or deciduous, often leathery, petioled or not; stipules 0. Inflorescence: raceme, panicle, cyme, or flowers 1, terminal or axillary, generally bracted; pedicel often with 2 bractlets. Flower: generally bisexual, generally radial, bell-shaped, cylindric, or urn-shaped; sepals generally (0)4--5, generally free; petals generally (0)4--5, free or fused; stamens (2--5)8--10, free, filaments rarely appendaged, anthers dehiscing by pores or slits, awns 0 or 2(4), seemingly abaxial, reduced or elongate, generally curved; nectary generally present at ovary base, generally 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. Seed: generally many, winged or not.
Genera In Family: +- 100 genera, 3000 species: generally worldwide except deserts; some cultivated, especially Arbutus, Arctostaphylos, Rhododendron, Vaccinium. Note: Monophyletic only if Empetraceae included, as treated here. Ledum included in Rhododendron. Non-green plants obtain nutrition from green plants through fungal intermediates.
eFlora Treatment Author: Gary D. Wallace, except as noted
Scientific Editor: Gary D. Wallace, Thomas J. Rosatti.
Genus: ArctostaphylosView DescriptionDichotomous Key

Common Name: MANZANITA
Habit: Shrub to small tree, prostrate to erect. Stem: old stems generally +- red, smooth, bark generally thin, peeling, or generally +- gray or red-gray, shredding and rough; burls at base, woody, sprouting after fire, or generally 0; twig hairs 0 or generally +- like those on inflorescence axes, bracts. Leaf: alternate, evergreen; blade flat to convex, base lobed to wedge-shaped, clasping stem or not, margins generally flat, surfaces with stomata generally both abaxially, adaxially, alike in color, hairiness, less often only or fewer abaxially, generally differing in color, hairiness. Inflorescence: +- raceme (generally 0--1-branched) or panicle (generally 2--10-branched), terminal, nascent inflorescence present following stem growth, generally late spring through winter, remaining dormant 4--6 months prior to flower (except in Arctostaphylos pringlei subsp. drupacea); branches 0 or raceme-like; flower bracts leaf-like, generally flat, or scale-like, often folded, keeled, tips rounded to acute to awl-shaped. Flower: radial; sepals 5(4), free, persistent; corolla conic to urn-shaped, lobes in number = sepals, short, rounded, curved back, white to pink; stamens 2 × number of sepals, included, filaments swollen, generally hairy at base, anthers dark red, awns elongate; ovary superior, on disk, 4--10-chambered, ovule 1 per chamber. Fruit: drupe, generally +- depressed-spheric to spheric; flesh generally thick, +- mealy, occasionally 0; stones 2--10, free, fused, or some fused.
Species In Genus: +- 62 species: North America (especially California) to Central America, Eurasia. Etymology: (Greek: bear berries)
Unabridged Note: Rosatti (1986 Syst Bot 12:61--77) showed that in Arctostaphylos uva-ursi little to none of the variation in hairs (including length, glandularity) is genetically based.
eFlora Treatment Author: V. Thomas Parker, Michael C. Vasey & Jon E. Keeley
Species: Arctostaphylos canescensView Description 

Habit: Shrub, erect, 0.3--3 m. Stem: twig canescent to white-tomentose. Leaf: erect; petiole 3--10 mm; blade 2--5 cm, 1--3 cm wide, round-ovate, ovate, or elliptic, white-gray, canescent, base rounded to wedge-shaped, tip acute to abruptly soft-pointed, margin entire, flat. Inflorescence: panicle, 1--3-branched; nascent inflorescence pendent, bell-shaped, axis 1--2 cm, > 1 mm wide, +- obscured, +- canescent to white-tomentose; bracts 6--20 mm, leaf-like, widely lanceolate, canescent; pedicel 5--9 mm, densely hairy, glandular or not. Flower: ovary densely (fruit sparsely) glandular- or nonglandular-hairy. Fruit: 5--10 mm wide, depressed-spheric; stones free. Chromosomes: 2n=26.

Arctostaphylos canescens Eastw. subsp. canescens
Stem: twig short-canescent, nonglandular. Inflorescence: nascent inflorescence axis canescent; pedicel hairy. Flower: ovary and young fruit densely nonglandular-hairy. Fruit: glabrous in age.
Ecology: Chaparral, open forest; Elevation: 200--2000 m. Bioregional Distribution: KR, NCoR, w SnFrB (Mount Tamalpais; s Santa Cruz Mtns); Distribution Outside California: southern Oregon. Flowering Time: Jan--May
Synonyms: Arctostaphylos candidissima Eastw.; Arctostaphylos canescens var. candidissima (Eastw.) Munz; Arctostaphylos cinerea Howell, in part
eFlora Treatment Author: V. Thomas Parker, Michael C. Vasey & Jon E. Keeley
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botanical illustration including Arctostaphylos canescens subsp. canescens


Citation for this treatment: V. Thomas Parker, Michael C. Vasey & Jon E. Keeley 2016. Arctostaphylos canescens subsp. canescens, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 04, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 04, 2016.

Arctostaphylos canescens subsp. canescens
click for enlargement
© 2009 Neal Kramer
Arctostaphylos canescens subsp. canescens
click for enlargement
© 2009 Neal Kramer
Arctostaphylos canescens subsp. canescens
click for enlargement
© 2009 Neal Kramer
Arctostaphylos canescens subsp. canescens
click for enlargement
© 2012 John Game
Arctostaphylos canescens subsp. canescens
click for enlargement
© 2008 Keir Morse
Arctostaphylos canescens subsp. canescens
click for enlargement
© 2008 Keir Morse

More photos of Arctostaphylos canescens subsp. canescens in CalPhotos

Geographic subdivisions for Arctostaphylos canescens subsp. canescens:
KR, NCoR, w SnFrB (Mount Tamalpais; s Santa Cruz Mtns);
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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.
Blue line denotes eFlora flowering time.