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The Jepson Manual is a flora of the vascular plants that are either native to or naturalized in California. Botanists often refer to the book simply as Jepson. It is produced by the University and Jepson Herbaria, of the University of California, Berkeley. [1] Its second edition is the basis of the online Jepson eFlora.
It was founded by Willis Linn Jepson in 1950, and named after him. [7] The Jepson Herbarium supports the Jepson eFlora, a taxonomic database that builds on and expands the second edition of The Jepson Manual. It describes itself as "the foremost authority on the native and naturalized vascular plants of California". [8]
The 2012 Jepson Manual treats the taxon under this name. [2] In 2020, it was proposed that Monardella villosa should be sunk into Monardella odoratissima, [4] a proposal accepted by Plants of the World Online as of April 2024. [5] In this treatment, Monardella villosa and its subspecies villosa become M. odoratissima subsp. villosa. [4] [5]
The 2012 Jepson Manual accepted Monardella villosa. [3] Studies in preparation for new editions of the Flora of North America and The Jepson Manual showed that there was "continuous variation" between M. odoratissima and M. villosa. Traditional characters that had been used to separate the two species varied with location, elevation and soil type.
Wayne P. Armstrong (aka "Mr. Wolffia") is a natural historian, author, photographer and creator of the extensive online natural history textbook, Wayne's Word: An Online Textbook Of Natural History. [1] He was a professor of botany at Palomar College, now adjunct professor. He is an expert on the flora of North San Diego County. [1]
The Jepson Manual 2nd edition (2012) reclassified the plant as Stipa parishii var. parishii. [3] [4] Description.
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As of 2011, The Jepson Manual includes Nassella within Stipa. [3] Nasella is characterized by strongly overlapping lemma margins and reduced, veinless paleae. The lemma tips are fused into the "crown", a short membrane that surrounds the base of the lemma. The rim of the crown usually has hairs.
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