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

Annual, perennial herb, generally dioecious, wind-pollinated; epidermis with hardened hairs, glands, etc.; sap watery
Stem erect or twining
Leaves palmately compound or lobed, petioled; lower generally opposite (upper often less lobed, alternate)
Staminate inflorescence: panicle or spike-like cluster, ± open
Pistillate inflorescence: spike-, cone-, or head-like cluster of often paired flowers, dense
Staminate flower: perianth parts 5, free; stamens 5; pistil 0
Pistillate flower: perianth parts fused into a short, unlobed tube or ring; stamens 0; ovary superior, chamber 1, ovule 1, style 1, very short, stigmas 2, thread-like, plumose
Fruit: achene, generally ± enclosed in persistent perianth
Genera in family: 2 genera, 3 species: n hemisphere; cultivated, economically important
Reference: [Mitchell 1988 NY State Mus Bull 464:17–23]



Annual, perennial herb
Stem twining; hairs sometimes forked
Leaf unlobed to palmately lobed
Staminate inflorescence: panicle, ± open
Pistillate inflorescence: head- or cone-like cluster, generally pendent (rarely erect), dense
Fruit enclosed in persistent, enlarged perianth subtended by papery bract
Species in genus: 3 species: n temp
Etymology: (Probably latinized from Low German: hop)

previous taxon | next taxon
bioregional map for HUMULUS 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 Humulus
Retrieve dichotomous key for Humulus
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