Plants & Trees Encyclopedia

Kale — Kale or Borecole is a form of cabbage (Brassica oleracea Acephala Group), green in color, in which the central leaves do not form a head. It is considered to be closer to wild cabbage than most domesticated forms. The species Brassica oleracea contains a wide array of vegetables, including broccoli, cauliflower, and Brussels sprouts. The Cultivar Group Acephala …

Juniper, Western — Juniperus occidentalis (Western Juniper and Sierra Juniper) is a shrub or tree native to the western United States, growing in mountains at altitudes of 800-3,000 m (rarely down to 100 m). The shoots are of moderate thickness among junipers, 1-1.6 mm diameter. The leaves are arranged in opposite decussate pairs or whorls of three; the adult leaves …

Juniper, Common — 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 mountains of Central America in the New World. Junipers vary in size and …

Jujube — Ziziphus zizyphus, commonly called Jujube, Red Date, or Chinese Date, is a species of Ziziphus in the buckthorn family Rhamnaceae, used primarily for its fruits. Its precise natural distribution is uncertain due to extensive cultivation, but is thought to be in southern Asia, between Syria, northern India, and southern and central China, and possibly also southeastern Europe though …

Jerusalem Artichoke — The Jerusalem artichoke (Helianthus tuberosus), also called the sunroot or sunchoke or topinambur, is a species of sunflower native to eastern North America, from Maine west to North Dakota, and south to northern Florida and Texas. It is also cultivated widely across the temperate world for its tuber, which is used as a root vegetable. It is …

Jasmine — Jasmine or Jessamine (Jasminum) (Yasmin in Arabic, Persian or Hebrew) is a genus of shrubs and vines in the olive family (Oleaceae), with about 200 species, native to tropical and warm temperate regions of the Old World. The majority of species grow as climbers on other plants or on structures. The leaves can be either evergreen or deciduous, …

Japanese Pagoda Tree — Styphnolobium is a small genus of three or four species of small trees and shrubs in the subfamily Faboideae of the pea family Fabaceae, formerly included within a broader interpretation of the genus Sophora. The species of Styphnolobium differ from Sophora in lacking the ability to form symbioses with rhizobia (nitrogen fixing bacteria) on their roots. …

Jack-in-the-Pulpit — Arisaema triphyllum (Jack-in-the-Pulpit, Bog onion, Brown dragon, Indian turnip, Wake robin or Wild turnip) is a herbaceous perennial plant growing from a corm. It is a highly variable species typically growing from 30 to 65 cm in height with three parted leaves and flowers contained in a spadix that is covered by a hood. It is native to …

Ivy — Hedera (English name ivy, plural ivies) is a genus of 15 species of climbing or ground-creeping evergreen woody plants in the family Araliaceae, native to the Atlantic Islands, western, central and southern Europe, northwestern Africa and across central-southern Asia east to Japan. On suitable surfaces (trees and rock faces), they are able to climb to at least 25–30 …

Iris — Iris is a genus of between 200-300 species of flowering plants with showy flowers which takes its name from the Greek word for a rainbow, referring to the wide variety of flower colors found among the many species. As well as being the scientific name, iris is also very widely used as a common name and refers to …