Status: Native
Synonyms:
Donia squarrosa Pursh
Grindelia aphanactis Rydberg
Grindelia nuda Wood
Grindelia pinnatifida Wooton & Standley
Grindelia serrulata Rydberg
Grindelia squarrosa (Pursh) Dunal var. nuda (Wood) Gray
Grindelia squarrosa (Pursh) Dunal Var. serrulata (Rydberg) Steyermark
Grindelia squarrosa is an erect herb with yellow disc flowers. Until recently,
Grindelia nuda was recognized as a separate species lacking yellow ray flowers. The two species
have been lumped together, so now Grindelia squarrosa may or may not have ray flowers. After anthesis,
the disc is covered with a gummy or resiny white substance. The phyllaries are reflexed.
Please click on an image for a larger file.
Grindelia squarrosa, photo Russ Kleinman, Rte. 180 south of Tyrone, June 20, 2007
Grindelia squarrosa, detail of inflorescence, photo Russ Kleinman, Rte. 180 south of Tyrone, June 20, 2007
Grindelia squarrosa, lacking rays (G. nuda of old nomenclature), photo Russ Kleinman, McKinney Road, Tyrone, Oct. 3, 2007
Grindelia squarrosa, detail of inflorescence being pollinated, photo Russ Kleinman, Pinos Altos Range, Signal Peak turnoff, July 2, 2007
Grindelia squarrosa, closeup of inflorescence after anthesis, photo Russ Kleinman, Pinos Altos Range, Sheep Corral, July 12, 2009
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