Smooth Blue Aster - Symphyotrichum laeve
MNPS Threat Rank
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.
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)