About
Find Nurseries
Design & Inspiration
California Garden Planner
Bay Area Garden Planner (NEW)
Planting Guide
Butterflies
My Plant Lists
Contact Us
Sign In
Donate
Advanced Search
Contact Us
Sign In
Donate
Home
Advanced Search
Map Locator
View Settings
Nurseries Carrying this Plant
Add Current Plant To List
Edit Current Plant
Show all Photos
About Calscape
Nurseries
California Garden Planner
Bay Area Garden Planner (NEW)
Planting Guide
Butterflies
My Plant Lists
Contact Calscape
Donate
Tap map to see plants native to location
Print Plant Signs
Print Plant Labels
Export To Excel
Export To Excel (Detailed)
Order by Popularity
Order by Common Name
Order by Scientific Name
Order by # of Butterflies Hosted
Show nursery cultivars
Hide nursery cultivars
Show plants not in nurseries
Hide plants not in nurseries
Grid view
Text view
Home
>
All plants
for California
>
Trifolium amoenum
|
Previous
Next
Loading....
Processing the request......
Two-fork Clover
( Trifolium amoenum )
Trifolium amoenum
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
Click on blue squares to see occurrence records.
<< Plant species
Zoom To My Address
Zoom To California
Estimated Plant Range (
?
)
occurrences >>
All Occurrence Records
0 Nurseries Carry This Plant
Add to My Plant List
About Two-fork Clover (Trifolium amoenum)
0 Nurseries Carry This Plant
Add to My Plant List
Trifolium amoenum
, known by the common names showy Indian clover and two-fork clover, is endemic to California, and is an endangered annual herb that subsists in grassland areas of the San Francisco Bay Area and the northern California Coast Ranges. This wildflower has an erect growth habit and is typically found on heavy soils at elevations less than 100 meters. The flower head is somewhat spherical with a diameter of about 2. 5 centimeters. The petals are purple gradating to white tips. History and Edward Lee Greene collected the first recorded specimen of this plant in 1890 in Vacaville, CaliforniaSolano County. The historical range of
Trifolium amoenum
was from the western extreme of the Sacramento Valley in Solano County west and north to Marin and Sonoma Counties, where many sites were presumed extirpated by urban and agricultural development. From further expansion of the human population,
Trifolium amoenum
had become a rare species by the mid 1900s. Through the latter 1900s the number of distinct populations dwindled to about 20 in number, from pressure of an expanding human population and urban development. Rediscovery. By 1993
Trifolium amoenum
was thought to be extinct, after the population in Vacaville, California depleted, but was rediscovered by Peter Connors in the form of a single plant on a site in western Sonoma County. The seeds from this single plant organism were used to grow more specimens. The Sonoma County location has been developed and any plants remaining there have been extirpated. Presently there is only a single extant population, subsequently discovered in 1996 in northern Marin County, which numbers approximately 200 plants.
Trifolium amoenum
became a federally listed endangered species in 1997. Recent conservation research on
Trifolium amoenum
has been conducted by the Bodega Marine Laboratory.
Plant Description
Plant Type
Annual herb
Size
2.3 ft tall
Flower Color
White, Green, Purple
Wildlife Supported
Butterflies & moths hosted ( 47
likely
* )
SHOW ALL
*
Gray Hairstreak
Strymon melinus
Strymon melinus
*
Orange Sulphur
Colias eurytheme
Colias eurytheme
*
Southern Dogface
Zerene cesonia
Zerene cesonia
*
Greenish Blue
Icaricia saepiolus
Icaricia saepiolus
*
Persius Duskywing
Erynnis persius
Erynnis persius
*
Clouded Sulphur
Colias philodice
Colias philodice
*
Northern Cloudywing
Thorybes pylades
Thorybes pylades
Landscaping Information
Natural Setting
Climate
Annual Precipitation: 20.4" - 43.2", Summer Precipitation: 0.22" - 0.45", Coldest Month: 45.3" - 50.7", Hottest Month: 59.8" - 74.9", Humidity: 0.44" - 21.80", Elevation: 13" - 429"
Alternative Names
Common Names
: Showy Indian Clover
Print Plant Sign
Print Plant Label
Back
Print
Back
Print
Two-fork Clover
Trifolium amoenum
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