Difference between revisions of "Symphyotrichum hendersonii"
Phytologia 77: 283. 1995.
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|common_names=Henderson’s aster | |common_names=Henderson’s aster | ||
| − | |basionyms={{Treatment/ID/ | + | |special_status={{Treatment/ID/Special_status |
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }} | ||
| + | |basionyms={{Treatment/ID/Basionym | ||
|name=Aster hendersonii | |name=Aster hendersonii | ||
|authority=Fernald | |authority=Fernald | ||
| + | |rank=species | ||
| + | |publication_title=Bull. Torrey Bot. Club | ||
| + | |publication_place=22: 273. 1895 (as hendersoni) | ||
}} | }} | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Aster foliaceus subsp. lyallii | |name=Aster foliaceus subsp. lyallii | ||
|authority=(A. Gray) Cronquist | |authority=(A. Gray) Cronquist | ||
| + | |rank=subspecies | ||
}} | }} | ||
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Symphyotrichum;Symphyotrichum sect. Occidentales;Symphyotrichum hendersonii | |hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Symphyotrichum;Symphyotrichum sect. Occidentales;Symphyotrichum hendersonii | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Symphyotrichum hendersonii | name=Symphyotrichum hendersonii | ||
| − | |||
|authority=(Fernald) G. L. Nesom | |authority=(Fernald) G. L. Nesom | ||
|rank=species | |rank=species | ||
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|publication title=Phytologia | |publication title=Phytologia | ||
|publication year=1995 | |publication year=1995 | ||
| − | |special status= | + | |special status=Endemic |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1190.xml |
|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Symphyotrichum | |genus=Symphyotrichum | ||
Latest revision as of 19:59, 5 November 2020
Perennials, 70–150 cm, colonial; long-rhizomatous. Stems 1–5+, ascending to erect, glabrous or puberulent, especially distally. Leaves thin, margins entire, apices acute, faces glabrous or scabridulous; basal persistent or withering by flowering, petiolate, blades oblanceolate, 50–150 × 10–20 mm, bases attenuate or cuneate; proximal cauline sessile, blades elliptic to oblanceolate, 80–200 × 10–25 mm, bases cuneate, auriculate; distal sessile, 40–80 × 7–20 mm, reduced distally. Heads in paniculiform arrays, branches numerous, 10–45 cm. Peduncles sparsely to densely hairy, bracts 3–10, acute, lanceolate to linear, bases auriculate. Involucres campanulate, 5–10 mm. Phyllaries in 4–5 series, narrowly oblong or linear (outer) to linear (inner), unequal, bases scarious, margins entire, sometimes proximally ciliate, green zones linear, apices acute, faces glabrous. Ray florets 25–45; corollas violet, laminae 9–15 × 1–2.5 mm. Disc florets (50–)70–80; corollas yellow, 5–6 mm, lobes triangular, 0.5–0.8 mm. Cypselae brown, cylindric to obovoid, not compressed, 3–3.5 mm, 3–4-nerved, faces hairy; pappi white, 4.5–5 mm. 2n = 16, 32.
Phenology: Flowering Jul–Aug.
Habitat: Meadows, stream banks, forest openings
Elevation: 1000–1500+ m
Distribution
Calif., Idaho, Mont., Oreg., Wash.
Discussion
Symphyotrichum hendersonii is concentrated in north-central Idaho and adjacent Montana and Washington, with possibly outlying populations in the Siskiyou Mountains of southwestern Oregon and adjacent California. It is in some respects intermediate between S. spathulatum and S. cusickii; forms transitional to both of these species occur.
Selected References
None.