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The plant acts as a host for the white pine blister rust that threatened the timber industry. In 1911, the federal government banned the cultivation, sale, and transport of blackcurrants to protect the white pine. Government programs systematically destroyed blackcurrant plants by chemical spraying.
The species is divided into two varieties, [4] each known simultaneously as northern black currants, and by their own individual common, and scientific names; the type variety, R. h. var. hudsonianum, is also known as the Hudson Bay currant; [4] [7] whereas R. h. var. petiolare is also known as the western black currant.
The mainland habitat of Ribes viburnifolium along the southern San Diego and northern Baja California coast consists of coastal sage scrub and coastal succulent scrub, [8] with plants growing in canyons and arroyos with partial shade near the coast. [11]
Ribes (/ ˈ r aɪ b iː z /) [5] is a genus of about 200 known species of flowering plants, most of them native to the temperate regions of the Northern Hemisphere. [2] The species may be known as various kinds of currants, such as redcurrants, blackcurrants, and whitecurrants, or as gooseberries, and some are cultivated for their edible fruit or as ornamental plants.
A balanced artificial fertilizer can be used and a 10-10-10 granular product can be spread around the bushes at the rate of 100 to 240 grams (3 + 1 ⁄ 2 to 8 + 1 ⁄ 2 ounces) per plant. [13] Weed growth can be suppressed with an organic mulch such as sawdust, bark, mushroom compost or straw, heavy plastic topped with an organic mulch cover or ...
Ribes americanum is a North American species of flowering plant in the gooseberry family known as wild black currant, [1] [3] [4] [5] American black currant, [6] and eastern black currant. [7] It is widespread in much of Canada (from Alberta to Nova Scotia ) and the northern United States (from New England to Washington , with additional ...
A Palmer oak in Jurupa Valley is estimated to be 13,000 to 18,000 years old. The plant, which looks like a sprawling, dark green shrub, is now at the center of a development battle.
Of California's total plant population, 2,153 species, subspecies, and varieties are endemic and native to California alone, according to the 1993 Jepson Manual study. [4] This botanical diversity stems not only from the size of the state, but also its diverse topographies , climates, and soils (e.g. serpentine outcrops ).