Jepson eFlora: Taxon page
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Juniperus osteosperma

Higher Taxonomy
Family: CupressaceaeView DescriptionDichotomous Key

Habit: Shrub, tree, generally evergreen; monoecious or dioecious. Leaf: simple, cauline, alternate or opposite (either +- 4-ranked) or whorled in 3s (6-ranked), linear or scale-, awl- or needle-like (sometimes linear and awl-like on 1 pl, or on juvenile or injured plants), generally decurrent, covering young stems. Pollen Cone: axillary or terminal. Seed Cone: +- fleshy to generally woody, generally hard at maturity; scales opposite or whorled, peltate or not. Seed: 1--many per scale, angled or lateral winged, generally wind-dispersed. Chromosomes: n=11.
Genera In Family: 30 genera, 130+ species: +- worldwide, especially North America, Eurasia. Note: Incl (paraphyletic) Taxodiaceae. Taxa of (polyphyletic) Cupressus in TJM (1993) now in Callitropsis, Chamaecyparis, Hesperocyparis.
eFlora Treatment Author: Jim A. Bartel, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: JuniperusView DescriptionDichotomous Key

Common Name: JUNIPER
Habit: Shrub, tree; generally dioecious. Stem: bark thin, peeling in strips; young shoots 4-angled to cylindric. Leaf: opposite (4-ranked) or whorled in 3s (6-ranked), scale-like to less often awl- or needle-like. Pollen Cone: generally terminal; pollen sacs 2--6 per scale. Seed Cone: generally terminal, 5--18 mm, +- spheric, +- fleshy, berry-like, glaucous or not, dry or resinous, generally maturing 2nd year, surrounded at base by minute scale-like bracts; scales 3--8, fused, opposite or whorled in 3s. Seed: 1--3 per cone, +- flat, unwinged, often not angled, generally animal-dispersed over 2 years; cotyledons 2--6.
Species In Genus: 67 species, 28 var.: northern hemisphere except northeastern Africa. Etymology: (Latin: juniper)
eFlora Treatment Author: Robert P. Adams & Jim A. Bartel

Juniperus osteosperma (Torr.) Little
Habit: Tree 1--8 m; monoecious. Stem: trunk generally 1; bark thin, gray-brown aging ash-white. Leaf: generally opposite, 4-ranked; closely appressed, scale-like; gland obscure. Pollen Cone: 2--3 mm, cylindric. Seed Cone: 5--13 mm, spheric, brown maturing red-brown, dry. Seed: 1(2), 3--4 mm, ovoid, strongly angled.
Ecology: Pinyon/juniper woodland; Elevation: 1300--2600 m. Bioregional Distribution: SnGb, SnBr, GB, DMtns; Distribution Outside California: to Montana, New Mexico.
eFlora Treatment Author: Robert P. Adams & Jim A. Bartel
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botanical illustration including Juniperus osteosperma


Citation for this treatment: Robert P. Adams & Jim A. Bartel 2017. Juniperus osteosperma, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on August 23, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on August 23, 2017.

Juniperus osteosperma
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© 2015 California Academy of Sciences
Juniperus osteosperma
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© 2014 California Academy of Sciences
Juniperus osteosperma
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© 2015 California Academy of Sciences
Juniperus osteosperma
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© 2001 California Academy of Sciences
Juniperus osteosperma
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© 2000 Gary A. Monroe
Juniperus osteosperma
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© 2009 California Academy of Sciences

More photos of Juniperus osteosperma in CalPhotos

Geographic subdivisions for Juniperus osteosperma:
SnGb, SnBr, GB, DMtns;
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).

View elevation by latitude chart
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.