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- Dichotomous Key
- Cupressaceae
- Juniperus
- Juniperus communis
Juniperus communis — common juniper
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Facts
Common juniper, including its varieties, has the most extensive worldwide native range of any conifer. Although it attains the stature of a small tree elsewhere in the world, it usually takes the form of a low-spreading shrub in New England. The seed cones, often referred to as “juniper berries” because they resemble a blue, spherical berry, supply the flavoring for gin, and can provide seasoning for meat and other dishes. Many game birds also eat the seed cones. This versatile plant grows in a variety of challenging conditions and is resistant to browse. It is widely planted as a hedgerow and for topiary.
Habitat
Anthropogenic (man-made or disturbed habitats), cliffs, balds, or ledges, meadows and fields, ridges or ledges, talus and rocky slopes
New England distribution
Adapted from BONAP data
Native: indigenous.
Non-native: introduced (intentionally or unintentionally); has become naturalized.
County documented: documented to exist in the county by evidence (herbarium specimen, photograph). Also covers those considered historical (not seen in 20 years).
State documented: documented to exist in the state, but not documented to a county within the state. Also covers those considered historical (not seen in 20 years).
Note: when native and non-native populations both exist in a county, only native status is shown on the map.
Found this plant? Take a photo and post a sighting.
Characteristics
- Habitat
- terrestrial
- New England state
-
- Connecticut
- Maine
- Massachusetts
- New Hampshire
- Rhode Island
- Vermont
- Growth form
- the plant is a shrub (with multiple stems, or prostrate, growing close to the ground)
- Leaf form
- the leaves are scale-like
- Leaf cross-section
- the needle-like leaves are flattened (can't be rolled between the fingers)
- Leaf arrangement
- there are three needle-like leaves per node
- Seed cone form
- the seed cone is formed from a berry-like cone with leathery scales
- Leaf clustering
- the needle-like leaves are single, with three or more per node
- Seed cone shape
- the seed cone is globose (spherical)
- Leaves overlapping
- the needle-like leaves are separate and do not hide the twig surface
-
Buds or leaf scars
- Winter bud shape
- the winter buds are ovoid (egg-shaped)
-
Fruits or seeds
- Seed cone base
- NA
- Seed cone bracts
- NA
- Seed cone form
- the seed cone is formed from a berry-like cone with leathery scales
- Seed cone scales
- NA
- Seed cone shape
- the seed cone is globose (spherical)
- Seed cone symmetry
- the seed cone is symmetrical
- Seed cone umbo position
- NA
- Seed cone umbo spine
- NA
- Seed wings
- there are no wings on the seeds
-
Growth form
- Growth form
- the plant is a shrub (with multiple stems, or prostrate, growing close to the ground)
-
Leaves
- Leaf arrangement
- there are three needle-like leaves per node
- Leaf base
- NA
- Leaf clustering
- the needle-like leaves are single, with three or more per node
- Leaf cross-section
- the needle-like leaves are flattened (can't be rolled between the fingers)
- Leaf duration
- the needle-like leaves remain green all winter
- Leaf form
- the leaves are scale-like
- Leaf glands
- the needle-like leaves have glands on the underside
- Leaf stalks
- the needle-like leaves do not have a leaf stalk
- Leaf types
- there is only one type of needle-like leaf on the twig
- Leaves overlapping
- the needle-like leaves are separate and do not hide the twig surface
-
Place
- Habitat
- terrestrial
- New England state
-
- Connecticut
- Maine
- Massachusetts
- New Hampshire
- Rhode Island
- Vermont
- Specific habitat
-
- cliffs, balds, or ledges
- man-made or disturbed habitats
- meadows or fields
- ridges or ledges
- talus or rocky slopes
-
Stem, shoot, branch
- Bark resin blisters
- there are no resin blisters on the bark
- Branchlet thickness
- 1–4 mm
- Leaves on shoots
- the needle-like leaves do not grow in tight clusters on a short, knob-like shoot
- Twig bloom
- there is no bloom on the twig
- Twig hair type
- the twigs have few or no hairs on them
- Twig hairs
- the twig does not have hairs
Wetland status
Usually occurs in non-wetlands, but occasionally in wetlands. (Wetland indicator code: FACU)
In New England
Distribution
- Connecticut
- present
- Maine
- present
- Massachusetts
- present
- New Hampshire
- present
- Rhode Island
- present
- Vermont
- present
Conservation status
Exact status definitions can vary from state to state. For details, please check with your state.
var. depressa
- Massachusetts
- widespread (S-rank: S5)
- Vermont
- widespread (S-rank: S5)
Subspecies and varieties
Our variety is Juniperus communis L. var. depressa Pursh.
From Flora Novae Angliae dichotomous key
1. Juniperus communis L. var. depressa Pursh N
common juniper. Juniperus canadensis Lodd. ex Burgsd.; J. communis L. ssp. depressa (Pursh) Franco; J. depressa (Pursh) Raf. • CT, MA, ME, NH, RI, VT. Fields, roadsides, abandoned pastures, and rocky slopes, sometimes ascending high into the mountains. Forms of this species occurring above treeline have sometimes been identified as Juniperus communis var. saxatilis Pallas (a taxonomic synonym of J. communis var. montana Ait.). Plants from New England’s higher peaks are not referable to this taxon because the stomatal bands, though somewhat wider than the green bands, are not within the range of var. montana (which is restricted to Greenland in eastern North America).
Native to North America?
Yes
Sometimes confused with
- Taxus canadensis:
- leaves alternate, with yellow-green stomatal bands on the abaxial surface, and seeds solitary, surrounded by a red, fleshy aril (vs. J. communis, with leaves whorled, with prominent pale stomatal bands on the adaxial surface, and seeds 2 or 3 together in a berry-like cone).
Synonyms
- Juniperus canadensis Lodd. ex Burgsd.
- Juniperus communis ssp. depressa (Pursh) Franco
- Juniperus depressa (Pursh) Raf.