Oreostemma alpigenum subsp. andersonii

Anderson's Mountaincrown Aster

Oreostemma alpigenum var. andersonii (A. Gray) G.L. Nesomis native to bogs, marshes, moist to wet meadows, lake edges, pine woods, alpine tundra of the Cascade Mts. of southern Oregon and northern California and the Sierra Nevada range of California and adjacent Nevada (Nesom 2006 FNA).  The subspecies is distinguished by its linear-oblanceolate to narrowly oblanceolate basal leaf blades with acute apices and its strigulose fruit.  The subspecies includes diploids (2n=18) and tetraploids (2n=36).

Last revised 11 May 2025 by J.C. Semple

© 2025 J.C. Semple, including all photographs unless otherwise indicated

Oreostemma apligenum var. andersonii, 8450, Mt. Shasta, California
Oreostemma apligenum var. andersonii, rootstock, 9325, Sierra Co.,California
Oreostemma apligenum andersonii 9325 CA inflor
Oreostemma apligenum var. andersonii, scapose head, 9325, Sierra Co.,California

1-4. Oreostemma alpigenum var. andersonii. 1. Small plant, Semple & Heard 8450, Mt. Shasta, Siskiyou Co., California. 2-4. Rootstock, inflorescence and head, Semple et al. 9325, Sierra Co., California.