Juniperus rigida
Encyclopedia
Juniperus rigida is a species of juniper
, native to northern China
, Korea
, Japan
, and the far southeast of Russia
(Primorsky Krai
), occurring at altitudes of 10-2,200 m. It is closely related to Juniperus communis
(Common Juniper) and Juniperus conferta (Shore Juniper), the latter sometimes treated as a variety or subspecies of J. rigida.
It is a shrub
or small tree
growing to a height of 6–10 m and a trunk diameter up to 50 cm. The leaves
are evergreen
, needle-like, in whorls of three, bright green to yellowish-green, 10-23 mm long and 1-1.3 mm broad, with a single white stoma
tal band on the inner surface. It is dioecious
, with separate male and female plants. The seed cones
are berry
-like, green ripening in 18 months to dark purple or brownish with a variable whitish waxy coating; they are spherical, 5-9 mm diameter, and have three (rarely six) fused scales in one (rarely two) whorls of three, each with a single seed
(when six scales, only the three larger scales with seeds). The seeds are dispersed when bird
s eat the cones, digesting the fleshy scales and passing the hard seeds in their droppings. The pollen cones are yellow, 3-5 mm long, and fall soon after shedding their pollen
in spring.
It is grown as an ornamental tree, often planted in temple
grounds in Japan. It is also often grown as bonsai
.
Juniper
Junipers are coniferous plants in the genus Juniperus of the cypress family Cupressaceae. Depending on taxonomic viewpoint, there are between 50-67 species of juniper, widely distributed throughout the northern hemisphere, from the Arctic, south to tropical Africa in the Old World, and to the...
, native to northern China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
, Korea
Korea
Korea ) is an East Asian geographic region that is currently divided into two separate sovereign states — North Korea and South Korea. Located on the Korean Peninsula, Korea is bordered by the People's Republic of China to the northwest, Russia to the northeast, and is separated from Japan to the...
, Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
, and the far southeast of Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
(Primorsky Krai
Primorsky Krai
Primorsky Krai , informally known as Primorye , is a federal subject of Russia . Primorsky means "maritime" in Russian, hence the region is sometimes referred to as Maritime Province or Maritime Territory. Its administrative center is in the city of Vladivostok...
), occurring at altitudes of 10-2,200 m. It is closely related to Juniperus communis
Juniperus communis
Juniperus communis, the Common Juniper, is a species in the genus Juniperus, in the family Cupressaceae. It has the largest range of any woody plant, throughout the cool temperate Northern Hemisphere from the Arctic south in mountains to around 30°N latitude in North America, Europe and Asia.-...
(Common Juniper) and Juniperus conferta (Shore Juniper), the latter sometimes treated as a variety or subspecies of J. rigida.
It is a shrub
Shrub
A shrub or bush is distinguished from a tree by its multiple stems and shorter height, usually under 5–6 m tall. A large number of plants may become either shrubs or trees, depending on the growing conditions they experience...
or small tree
Tree
A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...
growing to a height of 6–10 m and a trunk diameter up to 50 cm. The leaves
Leaf
A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants....
are evergreen
Evergreen
In botany, an evergreen plant is a plant that has leaves in all seasons. This contrasts with deciduous plants, which completely lose their foliage during the winter or dry season.There are many different kinds of evergreen plants, both trees and shrubs...
, needle-like, in whorls of three, bright green to yellowish-green, 10-23 mm long and 1-1.3 mm broad, with a single white stoma
Stoma
In botany, a stoma is a pore, found in the leaf and stem epidermis that is used forgas exchange. The pore is bordered by a pair of specialized parenchyma cells known as guard cells that are responsible for regulating the size of the opening...
tal band on the inner surface. It is dioecious
Plant sexuality
Plant sexuality covers the wide variety of sexual reproduction systems found across the plant kingdom. This article describes morphological aspects of sexual reproduction of plants....
, with separate male and female plants. The seed cones
Conifer cone
A cone is an organ on plants in the division Pinophyta that contains the reproductive structures. The familiar woody cone is the female cone, which produces seeds. The male cones, which produce pollen, are usually herbaceous and much less conspicuous even at full maturity...
are berry
Berry
The botanical definition of a berry is a fleshy fruit produced from a single ovary. Grapes are an example. The berry is the most common type of fleshy fruit in which the entire ovary wall ripens into an edible pericarp. They may have one or more carpels with a thin covering and fleshy interiors....
-like, green ripening in 18 months to dark purple or brownish with a variable whitish waxy coating; they are spherical, 5-9 mm diameter, and have three (rarely six) fused scales in one (rarely two) whorls of three, each with a single seed
Seed
A seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant...
(when six scales, only the three larger scales with seeds). The seeds are dispersed when bird
Bird
Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
s eat the cones, digesting the fleshy scales and passing the hard seeds in their droppings. The pollen cones are yellow, 3-5 mm long, and fall soon after shedding their pollen
Pollen
Pollen is a fine to coarse powder containing the microgametophytes of seed plants, which produce the male gametes . Pollen grains have a hard coat that protects the sperm cells during the process of their movement from the stamens to the pistil of flowering plants or from the male cone to the...
in spring.
It is grown as an ornamental tree, often planted in temple
Temple
A temple is a structure reserved for religious or spiritual activities, such as prayer and sacrifice, or analogous rites. A templum constituted a sacred precinct as defined by a priest, or augur. It has the same root as the word "template," a plan in preparation of the building that was marked out...
grounds in Japan. It is also often grown as bonsai
Bonsai
is a Japanese art form using miniature trees grown in containers. Similar practices exist in other cultures, including the Chinese tradition of penjing from which the art originated, and the miniature living landscapes of Vietnamese hòn non bộ...
.