Boltonia asteroides

(Linnaeus) L’Héritier

Sert. Angl., 27. 1789.

Common names: White doll’s-daisy asterlike boltonia
IllustratedEndemic
Basionym: Matricaria asteroides Linnaeus Mant. Pl., 116. 1767
Treatment appears in FNA Volume 20. Treatment on page 355. Mentioned on page 357.

Plants 30–200 mm; stoloniferous. Stems erect. Leaf-blades linear or lanceolate to oblanceolate; cauline 20–220 × 2–30 mm, bases not decurrent. Heads usually in corymbiform, sometimes paniculiform arrays, branches spreading to ascending, most bracts leaflike, 15–120 × 2–18 mm. Peduncles 5–220 mm; bracts 0–15, linear to subulate or ovate to oblanceolate, 2–12 (–62) mm. Involucres 3–5 × 4–14 mm. Phyllaries in 3–5 series, subulate, linear, lanceolate, or spatulate, subequal, 0–6 merging down peduncles; outer 1.5–3.8 × 0.4–1.6 mm; inner 2.1–4 × 0.3–1.5. Ray-florets 20–60; corollas white to lilac, laminae 5–13 mm, tubes 0.5–1.7 mm. Disc-florets 65–170; corollas 1.5–2.6 mm. Cypselae obovoid, 1–3 × 0.8–2 mm, wings 0.1–0.5 mm wide; pappi awns 0.4–2 mm (lengths ± 2/3 cypselae).

Distribution

V20-819-distribution-map.gif

Man., Sask., Ala., Ark., Conn., Del., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Minn., Miss., Mo., N.C., N.Dak., N.J., N.Y., Nebr., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Va., Vt., Wis.

Discussion

Varieties 3 (3 in the flora).

Variety asteroides is restricted to the coastal plain province. Varieties latisquama and recognita occur in the central lowland province and in the highland provinces between it and the coastal plain; var. recognita is also disjunct in Idaho and Oregon.

Selected References

None.

Key

1 Phyllaries linear to linear-attenuate or subulate, apices acute; pappus awn lengths to 2/3 cypselae Boltonia asteroides var. asteroides
1 Phyllaries spatulate, oblanceolate, or linear-oblanceolate, apices cuspidate; pappus awn lengths 2/3 + cypselae > 2
2 Phyllaries spatulate to obovate-spatulate, membranaceous margins broad, (2–)2.5–6 mm wide Boltonia asteroides var. latisquama
2 Phyllaries, oblanceolate to linear-oblanceolate, membranaceous margins ± narrow, 1–2.5(–3) mm wide Boltonia asteroides var. recognita
... more about "Boltonia asteroides"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Vesna Karaman-Castro +  and Lowell E. Urbatsch +
(Linnaeus) L’Héritier +
7 +  and 12 +
not decurrent +
Matricaria asteroides +
subulate;lanceolate or oblanceolate +
rugulose +  and muricate +
1.2 cm12 mm <br />0.012 m <br /> (6.2 cm62 mm <br />0.062 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (12 cm120 mm <br />0.12 m <br />) +
linear +  and subulate or ovate +
0.2 cm2 mm <br />0.002 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
spreading;ascending +
barbellulate +  and barbellate +
2 cm20 mm <br />0.02 m <br /> (22 cm220 mm <br />0.22 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (3 cm30 mm <br />0.03 m <br />) +
White doll’s-daisy +  and asterlike boltonia +
not 2-lipped +  and actinomorphic +
white +  and lilac +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
compressed;obovoid;cuneate or obcordiform +
Man. +, Sask. +, Ala. +, Ark. +, Conn. +, Del. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, N.C. +, N.Dak. +, N.J. +, N.Y. +, Nebr. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Va. +, Vt. +  and Wis. +
puberulent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
hemispheric +
0.4 cm4 mm <br />0.004 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
cauline +  and basal +
triangular +
not +  and winged +
entire +  and serrulate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
2-carpellate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +
0.5 cm5 mm <br />0.005 m <br /> (22 cm220 mm <br />0.22 m <br />) +
spatulate +, lanceolate +, linear +  and subulate +
Sert. Angl., +
triquetrous +
bearing subulate enations +, hairy +  and bristly +
conic;hemispheric +
adaxial +  and abaxial +
1 +  and 2 +
exalbuminous +
Illustrated +  and Endemic +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Boltonia asteroides +
Boltonia +
species +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
30 cm300 mm <br />0.3 m <br /> (200 cm2,000 mm <br />2 m <br />) +
0.1mm +  and 0.5mm +