Lomatium cookii
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Lomatium cookii is a species of the genus Lomatium within the umbelliferae family(Apiaceae). This endemic only comes in two valleys in the State of Oregon before and is there english Cook's lomatium, Agate desertparsley called. From The Nature Conservancy = TNC is Lomatium cookii classified as "critically endangered" ( "G1"). It has been listed as an endangered species for the USA since 2002.
description
Vegetative characteristics
Lomatium cookii is a perennial herbaceous plant with heights of 15 to 50 centimeters. The above-ground parts of the plant are bare. A stem is hardly recognizable. The root is elongated, narrow and 15 to 30 centimeters long; it is simply built and occasionally crowned by a two to eight-part caudex .
The leaves are divided into leaf sheath, petiole and leaf blade. The petiole is 15 to 40 centimeters long. The leaf blade is elongated and triply divided and pinnate with a length of 8 to 17 centimeters and a width of 2.5 to 10 centimeters. With a length of 6 to 12 millimeters and a width of around 1 millimeter, the individual leaf segments are linear and tapering to a point.
Generative characteristics
The double-gold inflorescence contains six to twelve-pointed, spread out single umbels of 2 to 9 centimeters in length, which are supplemented by 1 to 2 centimeters long sterile single umbels. The eight to twelve bracts are 6 to 10 millimeters long, linear and green in color, their edges membranous. The flowers are yellow and the petals 1 to 3 millimeters long.
The double axis is 8 to 13 millimeters long and 4 to 6 millimeters wide, the lateral "wings" are corky and thickened; the three dorsal ribs are filigree and elongated. Oil channels - as found in some species of the Lomatium genus - are missing.
Occurrence and endangerment
Lomatium cookii occurs exclusively in the Agate Desert in Jackson County and in the Illinois River Valley in Josephine County in southwest Oregon .
Lomatium cookii thrives in biotope types that are humid in spring, such as temporary bodies of water and the adjoining estuaries of flowing waters and in adjoining humid floodplains . One of the two populations of Lomatium cookii grows at Rogue Valley International-Medford Airport, where soil has been deposited over the bedrock so that the conditions resemble those at the borders of temporary bodies of water, allowing the plants to thrive. The species found in the temporary waters and in the wetlands include Limnanthes floccosa , Alopecurus geniculatus , Deschampsia danthonioides , Danthonia californica , Poa scabrella and Brodiaea species.
Lomatium cookii has been on the US Endangered Species List since 2002 because it is rare and its habitats are threatened with destruction and degradation . Temporary, existing only in spring waters ( English vernal pools ) have largely disappeared from a region in Oregon, where they were once widely used because the land for agriculture and grazing , residential, industrial and commercial areas are used. Areas that were not directly destroyed have changed their hydrological conditions in such a way that the temporary bodies of water no longer appear as ecosystems . The sealing of roads, parking lots and other buildings on the one hand creates a strong surface runoff, on the other hand the water in the landscape is distributed differently through direct irrigation and a ditch system. In addition, the habitats were cut up by use and road construction . In 2002, only 15 Lomatium cookii sites were known in Jackson County and 21 sites in Josephine County.
Taxonomy
The first description of Lomatium cookii was made in 1986 by James S. Kagan in Madroño , Volume 33, Issue 1, pages 71-74, FIG. 1
It was first discovered in 1981 during a search for the rare Limnanthes floccosa subsp. grandiflora and deposited with the collective number Kagan 6018301. The type site is the Agate Desert.
Individual evidence
- ↑ a b Lomatium cookii at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed September 23, 2019.
- ↑ a b c d Lomatium cookii . In: NatureServe Explorer . Retrieved September 20, 2019.
- ↑ Endangered and Threatened Wildlife and Plants; 5-Year Status Reviews for Lomatium cookii (Cook's Lomatium) and Limnanthes floccosa ssp. grandiflora (Large-flowered Woolly Meadowfoam) . US Fish and Wildlife Service . September 2, 2010. Retrieved September 20, 2019.
- ↑ a b c d e f J. S. Kagan: A new species of Lomatium (Apiaceae) from southwestern Oregon . In: Madroño . 33, 1986, pp. 71-75.
- ↑ a b Cook's lomatium . US Fish and Wildlife Service, Oregon Fish and Wildlife Office. Retrieved September 23, 2019.
- ↑ Cecilia Welch, Sara Newman, Connor Whitaker: Managing and monitoring Lomatium cookii in the Illinois River Valley (aka driving ourselves LOCO in Cave Junction) . July 14, 2014. Accessed September 23, 2019.
- ↑ a b c Determination of Endangered Status for Lomatium cookii and Limnanthes floccosa ssp. grandiflora from southern Oregon; Final rule . In: Federal Register, Volume 67, No. 216 . US Fish and Wildlife Service. November 7, 2002. Retrieved September 23, 2019.
- ↑ a b c d e Lomatium cookii . Center for Plant Conservation. Archived from the original on December 15, 2010.