Boltonia decurrens

(Torrey & A. Gray) Alph. Wood

Amer. Bot. Fl., 166. 1870.

Common names: Clasping-leaf doll’s-daisy decurrent false aster
EndemicConservation concern
Basionym: Boltonia glastifolia var. decurrens Torrey & A. Gray Fl. N. Amer. 2: 188. 1842
Synonyms: Boltonia asteroides var. decurrens (Torrey & A. Gray) Engelmann ex A. Gray Boltonia latisquama var. decurrens (Torrey & A. Gray) Fernald & Griscom
Treatment appears in FNA Volume 20. Treatment on page 356. Mentioned on page 354, 357.

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


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.

Lower Taxa

... more about "Boltonia decurrens"
Vesna Karaman-Castro +  and Lowell E. Urbatsch +
(Torrey & A. Gray) Alph. Wood +
Boltonia glastifolia var. decurrens +
Clasping-leaf doll’s-daisy +  and decurrent false aster +
Ill. +  and Mo. +
100–200 m +
Open alluvial soils in wet prairies, shallow marshes, open river creek and lake shores +
Flowering Aug–Sep. +
Amer. Bot. Fl., +
schwegman1985a +
Endemic +  and Conservation concern +
Boltonia asteroides var. decurrens +  and Boltonia latisquama var. decurrens +
Boltonia decurrens +
Boltonia +
species +