Search results
Results from the WOW.Com Content Network
Potato virus U (PVU) is a pathogenic plant virus discovered in Peru in 1983. [1] PVU characteristically causes leaf malformation and necrotic spotting. Transmitted by mechanical inoculation—including seed-to-seed contact and grafting—PVU is also said to be transferred by nematodes of the genus Longidorus .
Botanical illustration of Antennaria plantaginifolia (1913). Antennaria plantaginifolia is rarely more than 15 centimeters (5.9 in) tall, consisting of a basal rosette, and an erect stem which bears the inflorescence, a tight flat topped cluster of 4 to 17 fuzzy flower heads composed exclusively of disc flowers, with no ray flowers.
Plant species (IUCN, 2023-1) 66,406 extant species have been evaluated; 61,035 of those are fully assessed [a] 34,588 are not threatened at present [b] 26,276 are threatened [c] 174 are extinct or extinct in the wild: 129 extinct (EX) species [d] 45 extinct in the wild (EW) 569 possibly extinct [CR(PE)] 48 possibly extinct in the wild [CR(PEW)]
A pioneering system of plant taxonomy, Linnaeus's Systema Naturae, Leiden, 1735. This list of systems of plant taxonomy presents "taxonomic systems" used in plant classification. A taxonomic system is a coherent whole of taxonomic judgments on circumscription and placement of the considered taxa. It is only a "system" if it is applied to a ...
In September 2016, the International Union for Conservation of Nature (IUCN) listed 3654 endangered plant species. [1] Of all evaluated plant species, 17% are listed as endangered. The IUCN also lists 99 subspecies and 101 varieties as endangered. No subpopulations of plants have been evaluated by the IUCN.
The Plant List was a list of botanical names of species of plants created by the Royal Botanic Gardens, Kew and the Missouri Botanical Garden and launched in 2010. [1] It was intended to be a comprehensive record of all known names of plant species over time, and was produced in response to Target 1 of the 2002–2010 Global Strategy for Plant Conservation (GSP C), to produce "An online flora ...
Various delphiniums are cultivated as ornamental plants, for traditional and native plant gardens. The numerous hybrids and cultivars are primarily used as garden plants, providing height at the back of the summer border, in association with roses, lilies, and geraniums. [citation needed] Most delphinium hybrids and cultivars are derived from D ...
Echeveria plants are evergreen.Flowers on short stalks (cymes) arise from compact rosettes of succulent fleshy, often brightly coloured leaves. [2] Species are polycarpic, meaning that they may flower and set seed many times over the course of their lifetimes.