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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.
Jepson wrote at least 11 books during his lifetime, with two focused on California's trees. His works include A Flora of California (1909), The Trees of California (1909); and the major A Manual of the Flowering Plants of California (1925), predecessor of The Jepson Manual (1993). A Flora of California – Volume I. San Francisco: Cunningham ...
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]
In 1993, The Jepson Manual estimated that California was home to 4,693 native species and 1,169 native subspecies or varieties, including 1,416 endemic species. A 2001 study by the California Native Plant Society estimated 6,300 native plants.
Ericameria nauseosa is a perennial shrub growing to 2 to 8 metres (6 + 1 ⁄ 2 to 26 feet). [3] The leaves, depending on the subspecies, are 2–7.5 centimetres (3 ⁄ 4 –3 inches) long [4] and narrow to spatula-shaped.
Galium jepsonii, with the common name Jepson's bedstraw, is a rare flowering plant species in the Rubiaceae — Madder family. [ 1 ] [ 2 ] The species name honors renowned California botanist Willis Linn Jepson .
Allium jepsonii, the Jepson's onion, grows to a height between about 20 and 40 centimeters from one or two oval-shaped bulbs. There is a single cylindrical leaf which is about the same length as the stem. The inflorescence holds 20 to 60 small flowers, each under a centimeter long with pink-veined white tepals with curling tips. [4] [6] [7]
Navarretia jepsonii is an uncommon species of flowering plant in the phlox family known by the common name Jepson's pincushionplant, or Jepson's navarretia. It is endemic to California , where it is known only from the Inner North Coast Ranges west of the Sacramento Valley .