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Montana Field Guide

Montana Field Guides

Smooth Blue Aster - Symphyotrichum laeve
Other Names:  Aster laevis


Global Rank: G5
State Rank: S5

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

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General Description
Perennial from a branched caudex or short rhizomes. Stems erect, 20–80 cm. Herbage glabrous. Leaves cauline, rarely basal, petiolate below, auriculate-clasping above; blades lanceolate to ovate, entire to serrate, 2–15 cm long. Inflorescence leafy-paniculate, open with many heads; peduncles often glaucous, glabrous to puberulent in lines, the bracts clasping. Involucre campanulate, 5–9 mm high; phyllaries linear-lanceolate, imbricate, glabrous, green above with white bases and hyaline margins. Rays 15 to 30, blue; ligules 7–12 mm long. Disk flowers 20 to 30, yellow, turning purplish; corollas 5–7 mm long. Achenes oblong, 2–4 mm long, glabrous (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety geyeri (A.Gray) G.L. Nesom.

Species Range
Present
 


Range Comments
Throughout N. America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 15

(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 grasslands, meadows, forest openings, especially along streams, roads or other disturbed areas; plains, valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Smooth Blue Aster — Symphyotrichum laeve.  Montana Field Guide.  .  Retrieved on , from