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Juniper berries are sometimes regarded as arils, [3] like the berry-like cones of yews. Juniperus communis berries vary from 4 millimetres ( 1 ⁄ 8 inch) to 12 millimetres ( 1 ⁄ 2 inch) in diameter; other species are mostly similar in size, though some are larger, notably J. drupacea ( 20–28 mm or 3 ⁄ 4 – 1 + 1 ⁄ 8 in).
[3]: 55 It is dioecious, with male and female cones on separate plants so requiring wind pollination to transfer pollen from male to female cones. Male trees or shrubs naturally live longer than female trees or shrubs; a male tree or shrub can live more than 2000 years. [4] [5] [6] [7]
Monoecious juniper plants are highly allergenic, with an Ogren Plant Allergy Scale (OPALS) rating of 9 out of 10. [citation needed] Completely male juniper plants have an OPALS rating of 10 [citation needed], and release abundant amounts of pollen. Conversely, all-female juniper plants have an OPALS rating of 1, and are considered "allergy ...
Low-Growing Spreading Junipers. These mat-forming junipers are generally under 1 foot tall and form a dense, colorful, spreading habit. A popular example is creeping juniper (Juniperus ...
The cones are berry-like, 5–10 mm in diameter, blue-brown with a whitish waxy bloom, [2] and mature in about 18 months. The male cones are 2–4 mm long and shed their pollen in early spring. The plants are about half monoecious (with both sexes on the same plant) and half dioecious (producing cones of only one sex).
The cones are berry-like, globose to ovoid, 5–10 mm long and 4–7 mm diameter, glossy blue-black, and contain one seed; they are mature in about 18 months. The male cones are 3–4 mm long, and shed their pollen in early spring. It is largely monoecious with pollen and seed cones produced on the same plants.
Because many juniper shrubs are slower growing, they are less likely to overstep their bounds and require pruning. The problem is when the wrong juniper is planted in the wrong spot.
The male cones are 2–4 mm long, and shed their pollen in late winter. It is usually dioecious, with male and female cones on separate plants, but occasional monoecious plants can be found. [3] [4] Its roots have been found to extend to as far as 61m below the surface, making it the plant with the second deepest roots, after Boscia albitrunca. [6]