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Montana Field Guide

Montana Field Guides

White Panicle Aster - Symphyotrichum lanceolatum
Other Names:  Aster lanceolatus, Aster hesperius


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

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General Description
Rhizomatous perennial. Stems erect, 40–100 cm. Herbage glabrate; stems puberulent in vertical lines from leaf bases. Leaves cauline, sessile, linear to lanceolate, entire, 5–15 cm long, often fascicled, the lowest deciduous. Inflorescence open, leafy-paniculate, usually with many heads; peduncles villous. Involucre narrowly campanulate, 5–9 mm high; phyllaries linear-lanceolate, weakly imbricate, glabrate to ciliate, green with white bases. Rays 18 to 45, white to blue; ligules 4–12 mm long. Disk flowers 18 to 52, yellow; corollas 4–7 mm long. Achenes obovoid, 1–3 mm long, sparsely hairy. Moist, sometimes saline soil of meadows, usually around streams, ponds; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are var. hesperium (A. Gray) G.L. Nesom.

Species Range
Present
 


Range Comments
BC to QC south to CA, AZ, NM, TX, IA and WI (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 5

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Moist, sometimes saline soil of meadows, usually around streams, ponds; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
White Panicle Aster — Symphyotrichum lanceolatum.  Montana Field Guide.  .  Retrieved on , from