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

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.

Lower Taxa

None.
... more about "Boltonia decurrens"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
corymbiform +  and corymbo-paniculiform +
indeterminate +  and determinate +
Vesna Karaman-Castro +  and Lowell E. Urbatsch +
(Torrey & A. Gray) Alph. Wood +
7 +  and 12 +
decurrent +
Boltonia glastifolia var. decurrens +
subulate;lanceolate or oblanceolate +
rugulose +  and muricate +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (12.5 cm125 mm <br />0.125 m <br />) +
linear +  and oblanceolate +
0.1 cm1 mm <br />0.001 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
barbellulate +  and barbellate +
6.4 cm64 mm <br />0.064 m <br /> (15.5 cm155 mm <br />0.155 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
Clasping-leaf doll’s-daisy +  and decurrent false aster +
not 2-lipped +  and actinomorphic +
white +  and lilac +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
obovoid +  and obcordiform +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
compressed;obovoid;cuneate or obcordiform +
Ill. +  and Mo. +
100–200 m +
puberulent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open alluvial soils in wet prairies, shallow marshes, open river creek and lake shores +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
hemispheric +
0.8 cm8 mm <br />0.008 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
cauline +  and basal +
triangular +
not +  and winged +
entire +  and serrulate +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.39 cm3.9 mm <br />0.0039 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
2-carpellate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.175 cm1.75 mm <br />0.00175 m <br />) +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (5.3 cm53 mm <br />0.053 m <br />) +
Flowering Aug–Sep. +
oblong +  and spatulate +
Amer. Bot. Fl., +
triquetrous +
bearing subulate enations +, hairy +  and bristly +
conic;hemispheric +
schwegman1985a +
adaxial +  and abaxial +
1 +  and 2 +
exalbuminous +
Endemic +  and Conservation concern +
appendaged +  and truncate +
papillate +  and smooth +
Boltonia asteroides var. decurrens +  and Boltonia latisquama var. decurrens +
Boltonia decurrens +
Boltonia +
species +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
30 cm300 mm <br />0.3 m <br /> (200 cm2,000 mm <br />2 m <br />) +
0.3mm +  and 0.4mm +