Tetraneuris grandiflora (Torr. & A. Gray ex A. Gray) K.F. Parker
Graylocks Four-nerve Daisy, Old-man-of-the-mountain, Alpine Sunflower, Rydbergia, Bitterweed
Asteraceae (Aster Family)
Synonym(s): Actinea grandiflora, Hymenoxys grandiflora, Rydbergia grandiflora
USDA Symbol: TEGR3
Out of a low mat of feathery leaves covered with cottony white hairs, rise 3-4 in. sunflowerlike flower heads on stems usually less than a foot high. The bright yellow petals with three teeth at the tip surround a broad, domed center which turns from yellow to tan with age.
From the Image Gallery
Bloom InformationBloom Color: Yellow
Bloom Time: May , Jun , Jul
DistributionUSA: CO , ID , MT , UT , WY
Native Distribution: S.w. MT & adjacent ID, s. to w. CO & n.e. UT
Native Habitat: Alpine tundra; mt. meadows
Growing ConditionsLight Requirement: Sun
Soil Moisture: Moist
Soil pH: Circumneutral (pH 6.8-7.2)
Soil Description: Moist, gravelly, limestone-rich soils.
Conditions Comments: Grows best where summers are cool and dry. Some populations die abruptly after flowering, so it is a good idea to stagger plantings over several years.
PropagationDescription: Propagate by seed.
Seed Collection: Not Available
Seed Treatment: A moist, cold treatment enhances germination.
Commercially Avail: yes
Find Seed or Plants
View propagation protocol from Native Plants Network.
Additional resourcesUSDA: Find Tetraneuris grandiflora in USDA Plants
FNA: Find Tetraneuris grandiflora in the Flora of North America (if available)
Google: Search Google for Tetraneuris grandiflora
MetadataRecord Modified: 2018-04-16
Research By: TWC Staff