California Native Plant Society
Tap map to see plants native to location
Add
Please enter either the common name or the botanical name of any native California plant species to see it's plant record

Loading....
Howell's Onion
  • Added Add to My Plant List
Allium howellii
  

Zoom To My AddressZoom To California Estimated Plant Range



About Howell's Onion (Allium howellii) Allium howellii is a species of wild onion known by the common name Howell's onion. It is endemic to California, where it grows in the granite and serpentine soils of several of the local mountain ranges, hills, and valleys. This is a tall onion plant, producing a stem which may exceed half a meter in height from a reddish-brown bulb one to two centimeters long. There is a single cylindrical leaf about as long as the stem. The flower cluster holds up to 100 dark-veined lavender to white flowers, each under a centimeter long.
Plant Description
Plant Type
Perennial herb

Flower Color
Lavender, White, Pink

Native Status
Native

Natural Setting
Site Type
granitic soils

Sun
Sun, Part Shade

Elevation ?
224' - 7076'

Annual Precip. ?
5.7" - 37.4"

Summer Precip. ?
0.14" - 1.22"

Coldest Month ?
32.6° F - 51.4° F

Hottest Month ?
59.4° F - 78.9° F

Humidity ?
1.21 vpd - 27.89 vpd

Landscaping Information
Propagation ?
For propagating by seed: No treatment.

Common uses
Bee Gardens

Nursery Availability
Rarely Available


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

Sign in to your Calscape Account X




Once signed in, you'll be able to access any previously saved plant lists or create new ones.

Email Address
Password

Sign In


Copyright © 1999-2014 California Native Plant Society. All rights reserved.