Difference between revisions of "Boltonia decurrens"
Amer. Bot. Fl., 166. 1870.
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|name=Boltonia asteroides var. decurrens | |name=Boltonia asteroides var. decurrens | ||
|authority=(Torrey & A. Gray) Engelmann ex A. Gray | |authority=(Torrey & A. Gray) Engelmann ex A. Gray | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=Boltonia latisquama var. decurrens | |name=Boltonia latisquama var. decurrens | ||
|authority=(Torrey & A. Gray) Fernald & Griscom | |authority=(Torrey & A. Gray) Fernald & Griscom | ||
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|distribution=Ill.;Mo. | |distribution=Ill.;Mo. | ||
|discussion=<p>Of conservation concern.</p><!-- | |discussion=<p>Of conservation concern.</p><!-- | ||
| − | --><p>Boltonia decurrens is known only from the flood plains of the Illinois and Mississippi rivers. Present-day populations are isolated and restricted to disturbed alluvial habitats, old fields, roadsides, and disturbed wet lake shores that replaced its natural habitats of flooded lake shores and marshes. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.</p> | + | --><p><i>Boltonia decurrens</i> is known only from the flood plains of the Illinois and Mississippi rivers. Present-day populations are isolated and restricted to disturbed alluvial habitats, old fields, roadsides, and disturbed wet lake shores that replaced its natural habitats of flooded lake shores and marshes. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.</p> |
|tables= | |tables= | ||
|references={{Treatment/Reference | |references={{Treatment/Reference | ||
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|publication year=1870 | |publication year=1870 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V20_824.xml |
|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Boltonia | |genus=Boltonia | ||
Revision as of 15:27, 18 September 2019
Plants 50–200+ cm; basal offshoots, rhizomes, and stolons absent. Stems erect. Leaf blades linear-lanceolate to narrowly lanceolate; cauline 64–155 × 8–26 mm, bases decurrent. Heads in corymbiform to corymbo-paniculiform arrays; bracts 11–125 × 1–19 mm. Peduncles 3–53 mm; bracts 0–1(–3), linear to oblanceolate, 3–5(–9) mm. Involucres 3.2–4.3 × 8–9 mm. Phyllaries in 3–5 series, oblong to spatulate, subequal, apices acuminate to cuspidate, 0–1 merging down peduncles; outer 2.3–3.9 × 0.5–1 mm; inner 3–4 × 0.6–1 mm. Ray florets 45–60; corollas white to lilac, laminae 9–14 mm, tubes 0.6–1.1 mm. Disc florets 230–400+; corollas 1.8–2.4 mm. Cypselae obovoid to obcordiform, 1.5–2.6 × 1.1–1.9 mm, wings 0.3–0.4 mm wide; pappus awns 0.8–1.75 mm. 2n = 18.
Phenology: Flowering Aug–Sep.
Habitat: Open alluvial soils in wet prairies, shallow marshes, open river creek and lake shores
Elevation: 100–200 m
Discussion
Of conservation concern.
Boltonia decurrens is known only from the flood plains of the Illinois and Mississippi rivers. Present-day populations are isolated and restricted to disturbed alluvial habitats, old fields, roadsides, and disturbed wet lake shores that replaced its natural habitats of flooded lake shores and marshes. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.