Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.



Elizabeth McClintock

Shrub, tree, evergreen, monoecious, dioecious, or flowers bisexual
Stem: trunk generally ± erect, unbranched
Leaves splitting to be palmately or pinnately dissected or compound, alternate, forming a terminal crown, large; base sheathing; petiole often long
Inflorescence: generally large panicle, axillary; peduncle sheathed by 1 or more large bracts; flowers many, generally ± sessile
Flower generally small, ± radial; sepals and petals generally 3, sometimes similar, fused at base or free; stamens generally 6; pistils 1 or 3, ovaries superior, generally 3, (if 1, chambers generally 3), styles free or fused
Fruit: often a drupe
Seed 1
Genera in family: ± 200 genera, 3,000 species: tropical, subtropical; many cultivated, especially for ornamental
Reference: [Uhl & Dransfield 1987 Genera Palmarum]
Used for food (fats, oils, fruits, seeds) and building materials.



Leaves persistent as a "skirt," palmately divided; segments folded longitudinally with margins upward; petiole margins and lower blade generally spiny
Inflorescence within crown, > leaves
Flower bisexual; perianth white; calyx lobes 3, ± erect; corolla lobes 3, reflexed; ovary 3-lobed, chambers 3
Species in genus: 2 species: deserts of s CA, AZ, n Mex
Etymology: (George Washington, 1st president, US, 1732–1799)
Reference: [Bailey 1936 Gentes Herb 4:52–82]
Widely cultivated as ornamental, CA to Florida.

previous taxon | next taxon
bioregional map for WASHINGTONIA being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Washingtonia
Retrieve dichotomous key for Washingtonia
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page
  • This page is no longer being maintained.

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California