Lomatium roseanum
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Lomatium roseanum |
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| Lomatium roseanum | ||||||||||||
| Cronquist |
Lomatium roseanum is a species of the genus Lomatium within the umbelliferae family(Apiaceae). This very rare species is found only in the western US states in the northwestern Nevada and southeastern Oregon before and there english Adobe parsley, adobe lomatium, rose-flowered desert-parsley called. Itis classified as "threatened" ("G2") by The Nature Conservancy = TNC.
description
Vegetative characteristics
Lomatium roseanum is a perennial herbaceous plant that rarely exceeds 10 centimeters in height. The above-ground parts of the plant are bare. A caudex is formed at the base . The root is thick and bulbous. The basic leaves are green and inconspicuous; Each of the three leaf lobes is in turn composed of three pointed leaflets, the numerous segments of which measure less than 1 cm in length. The leaf stalks are enclosed by leaf sheaths at their base. Lomatium roseanum is similar to Lomatium hendersonii , which, however, occurs further north; also is Lomatium roseanum robust and easy to recognize by the caudex.
Generative characteristics
The flowering period is between April and June; during this time the species can be found very easily in the wild. The inflorescence shafts are upright curved and 15 to 20 cm long. The inflorescences have slender bracts . The flowers are yellow, but turn whitish with age. The partial fruits are laterally only surrounded by narrow "wings", while the dorsal ribs are wingless.
Occurrence
The range of Lomatium roseanum is extremely small: The species is only known from Washoe County in Nevada and nearby places in southeast Oregon, where it may have disappeared again. It has also been suggested to be in Humboldt County , Nevada. The occurrences are at altitudes of 5,750 ft (1,753 m) to 6,175 ft (1,882 m).
Fewer than 20 populations are known, although some of them can be large. The largest populations are found in the Sheldon National Wildlife Refuge .
Lomatium roseanum lives in stony habitats. In particular, the species prefers basaltic talus slopes on loam - soil . It occurs in shrub steppes together with Artemisia arbuscula , Poa secunda , Elymus elymoides , Arenaria aculeata , Phlox spec. and Erigeron linearis .
The fire ecological significance is completely unknown to the representatives of the entire genus Lomatium . The steppe shrub plants associated with Lomatium roseanum lack the appropriate fuel to maintain a fire. Once burned down, these species that are not adapted to a fire regime die off and are temporarily replaced by Taeniatherum caput-medusae and Dach-Trespe ( Bromus tectorum ), whereby the steppe vegetation is replaced by the soil seed bank over time (about 2 to 5 years) renewed.
Taxonomy
A synonym for Lomatium roseanum Cronquist is Leptotaenia leibergii JMCoult. & Rose.
Individual evidence
- ↑ a b c d Lomatium roseanum - Cronq. . In: NatureServe Explorer . TNC . Retrieved October 30, 2019.
- ^ A b Arthur Cronquist, Noel H. Holmgren, Patricia K. Holmgren: Apiaceae . In: Intermountain Flora: Vascular Plants of the Intermountain West, USA Volume Three, Part A: Subclass Rosidae (except Fabales) 1997, pp. 412-413.
- ↑ a b c d e J.D. Morefield: Lomatium roseanum . In: Nevada Rare Plant Atlas . Nevada Natural Heritage Program. June 25, 2001. Retrieved March 28, 2007.
- ^ Peter D. Steinberg: Artemisia arbuscula . In: Fire Effects Information System . USDA FS RMRS Fire Sciences Laboratory. 2002. Retrieved March 28, 2007.
- ↑ Lomatium roseanum at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved December 22, 2019.
