Jepson eFlora: Taxon page
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon
Juniperus communis var. jackii
JACK'S JUNIPER

Higher Taxonomy
Family: CupressaceaeView DescriptionDichotomous Key

Common Name: CYPRESS FAMILY
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
Species: Juniperus communisView Description 

Common Name: COMMON JUNIPER
Habit: Shrub < 1 m, generally +- prostrate; generally dioecious. Stem: bark brown, peeling in papery sheets. Leaf: generally whorled in 3s, 6-ranked; suberect to spreading, awl- or needle-like, jointed, not decurrent. Pollen Cone: axillary, 4--5 mm. Seed Cone: axillary, 5--9 mm, green maturing bright blue to black, glaucous, resinous. Seed: 2--5 mm, ovoid, acute, generally 3-angled.
Note: 3 other varieties extend sp. range to include Europe, Asia.

Juniperus communis var. jackii Rehder
NATIVE
Habit: Spreading, mat-like, occasionally erect. Leaf: 7--9(10) mm; glaucous stomatal band 3--4 × as wide as green leaf margin. Seed Cone: mature elongate to +- spheric. Seed: 1(2) per cone.
Ecology: Rocky or wooded slopes, high-elevation forests, often on serpentine or lava; Elevation: 1900--3400 m. Bioregional Distribution: KR, CaRH; Distribution Outside California: Oregon.
Synonyms: Juniperus communis var. montana Aiton, in part
eFlora Treatment Author: Robert P. Adams & Jim A. Bartel
Jepson Online Interchange

Previous taxon: Juniperus communis var. depressa
Next taxon: Juniperus communis var. saxatilis

Name Search
botanical illustration including Juniperus communis var. jackii

Contact/Feedback

Citation for this treatment: Robert P. Adams & Jim A. Bartel 2016. Juniperus communis var. jackii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=60423, accessed on May 05, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 05, 2016.


Geographic subdivisions for Juniperus communis var. jackii:
KR, CaRH;
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.
READ ABOUT YELLOW FLAGS
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.
View all CCH records

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.