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Gammill, Lynn Crosby
Wyethia amplexicaulis (Nutt.) Nutt.
Synonym(s): Espeletia amplexicaulis
USDA Symbol: WYAM
USDA Native Status: L48 (N)
Large, round, shiny leaves subtend a stout but lax stem, 1-3 ft. tall. Stem leaves are more lance-shaped, resembling the ears of mule. A large, yellow, sunflower-like flower head is often surrounded by smaller yellow flowers. Plant seems varnished with resin, the stout leafy stems growing from clumps of lanceolate leaves, ending in several large deep yellow flower heads on long stalks, the central head largest.
All species have leaves on the stem, distinguishing them from Balsamorhiza, which has all leaves at the base.
Plant CharacteristicsDuration: Perennial Habit: Herb Leaf:
Fruit: Size Class:
Bloom InformationBloom Color: Yellow
Bloom Time: May , Jun
, WY Native Distribution:
to w. MT,
s. to NV
& n.w. CO Native Habitat:
Dry meadows; open hillsides; foothills; canyons
Growing ConditionsWater Use: Medium
Light Requirement: Sun
Soil Moisture: Wet
Soil pH: Circumneutral (pH 6.8-7.2)
CaCO3 Tolerance: Medium
Soil Description: Moist to mesic, well-drained clayey loams.
BenefitConspicuous Flowers: yes
National Wetland Indicator Status
|Status:|| FAC || FACU |
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Native Seed Network
- Corvallis, OR
Record Last Modified: 2007-01-01
Research By: TWC Staff