Lomatium congdonii
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Lomatium congdonii |
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Lomatium congdonii is a species of the genus Lomatium within the umbelliferae family(Apiaceae). This endemic occurs only in the western US state of California and is called there English Congdon's lomatium, Mariposa desertparsley, Mariposa parsnip . Lomatium congdonii is classified as "potentially endangered" or "rare, endangered or threatened (1B.2)".
description
Vegetative characteristics
Lomatium congdonii is a perennial herbaceous plant that reaches heights of 18 to 36 centimeters. It forms a taproot . The above-ground parts of the plant are blue-green, bare to rough. The stem axis is very short and the base is fibrous.
The leaves are divided into leaf sheath, petiole and leaf blade. The durable, dry-skinned leaf sheath completely surrounds the petiole. The petiole is 2 to 6 inches long. The leaf blade is 6.5 to 15 centimeters long, broad-elongated and three-part to pinnate. Your leaf segments are linear with a length of 3 to 10 millimeters with spiked upper ends.
Generative characteristics
On a 12 to 30 centimeter long inflorescence stem is the double-gold inflorescence , which is bare to rough. There are 6 to 16 3 to 13.5 inches long ascending rays. Bract leaves are missing. The flower stalks are 6 to 15 millimeters long. The petals are light yellow.
With a length of 7 to 10 millimeters, the bald double achene is ovoid to obovate. The "wings" are about half as wide as the fruiting body. Usually there is one oil channel for each space between the ribs.
Occurrence
This endemic occurs in California only in the foothills of the central Sierra Nevada in the counties Tuolumne and Mariposa . Only a few sites are known. Evidence with the label Lomatium congdonii is also available from northern California from the counties Siskiyou and Mendocino .
Lomatium congdonii grows over serpentine rock in forests at altitudes of 300 to 1200 meters.
Taxonomy
The first description of Lomatium congdonii was in 1900 by John Merle Coulter and Joseph Nelson Rose in Contributions from the United States National Herbarium , Volume 7, Issue 1, page 232. The type locality is in West Water Ditch in Mariposa County and the type material was found under the number JW Congdon 114 deposited in the US National Herbarium. The specific epithet Lomatium congdonii honors the lawyer Joseph Whipple Congdon , who made decisive contributions in the early days of botanical research in California and who collected the type material.
A synonym for Lomatium congdonii J.M.Coult. & Rose is Cogswellia congdonii (JMCoult. & Rose) MEJones .
Individual evidence
- ↑ a b Lomatium congdonii at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed September 24, 2019.
- ↑ a b c d Lomatium congdonii . In: Calflora Database . Retrieved September 20, 2019.
- ↑ a b c Lomatium congdonii JM Coult. & Rose . In: ITIS Report . Retrieved September 20, 2019.
- ↑ Elizabeth Painter: Lomatium congdonii . In: The Jepson Online Interchange California Floristics, Common (vernacular) names applied to California vascular plants . May 1, 2016. Retrieved September 20, 2019.
- ↑ a b c d e f Lincoln Constance, Margriet Wetherwax 2017: Lomatium congdonii CONGDON'S LOMATIUM - data sheet at Jepson Flora Project (eds.): Jepson eFlora , Revision 5.
- ↑ Lomatium congdonii . In: Calflora Plant distribution . Retrieved September 20, 2019.
- ^ Distribution of Lomatium congdonii . In: County-Level Distribution Results . Consortium of California Herbaria. Retrieved September 20, 2019.
- ↑ Lomatium congdonii C. & R. sp. nov. . In: Contributions from the US National Herbarium , Volume VII 1900-1902.
- ^ Willis Linn Jepson: A Flora of California , Volume 2 1936.