Symphyotrichum lanceolatum var. hirsuticaule

(Semple & Chmielewski) G. L. Nesom

Phytologia 77: 284. 1995.

Basionym: Aster lanceolatus var. hirsuticaulis Semple & Chmielewski Canad. J. Bot. 65: 1058, fig. 12. 1987
Treatment appears in FNA Volume 20. Treatment on page 520. Mentioned on page 519.

Stems stout, evenly, moderately to densely short-woolly. Leaf blades usually linear-lanceolate, distal margins entire. Heads 5–200+, not congested on lateral branches of arrays, not subtended by large foliaceous bracts. Involucres 3.6–4.7 mm. Phyllaries: outer 2–3.5 × 0.4–0.6 mm, inner 3.4–4.3 × 0.3–0.5 mm, outer 1/3–2/3 length of inner. Ray florets 20–40; corollas usually white, sometimes pink or pale blue, laminae 4.2–5.8 mm. Disc florets 16–27; corollas 3.5–4.6 mm, limbs 2–2.8, lobes 0.6–0.9. Cypselae 0.7–1.1; pappi 3.4–5.2 mm. 2n = 32.

Phenology: Flowering Jul–Oct.
Habitat: Mucky soils on glacial deposits
Elevation: 100–300+ m



Man., Ont., Ill., Iowa, Mich., Minn., Wis.


Variety hirsuticaule is encountered mainly in mucky soils in upland glacial deposits of southern Ontario, in the eastern and western Lake Superior areas at the northern limit of the deciduous forest, west to southeastern Manitoba, northern Illinois and Michigan. Plants tend to bloom slightly earlier than do those of other varieties in the area and often the stems are stouter.

Selected References


Lower Taxa

Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Semple & Chmielewski) G. L. Nesom +
Aster lanceolatus var. hirsuticaulis +
Man. +, Ont. +, Ill. +, Iowa +, Mich. +, Minn. +  and Wis. +
100–300+ m +
Mucky soils on glacial deposits +
Flowering Jul–Oct. +
Aster sect. Heterastrum +  and Aster subg. Symphyotrichum +
Symphyotrichum lanceolatum var. hirsuticaule +
Symphyotrichum lanceolatum +
variety +