Boltonia diffusa

Elliott

Sketch Bot. S. Carolina 2: 400. 1823.

Common names: Smallhead doll’s-daisy
IllustratedEndemic
Synonyms: Boltonia asteroides Sims
Treatment appears in FNA Volume 20. Treatment on page 357. Mentioned on page 355.

Plants 30–200 cm; basal offshoots and stolons present or absent. Stems erect (slender). Leaf-blades linear to narrowly lanceolate; cauline 25–115 × 3–17 mm, bases not decurrent. Heads 30–100+ in paniculiform arrays, primary branches mostly spreading; only proximal bracts leaflike, others reduced, linear to linear-oblanceolate or subulate, 8–55 × 1–6 mm. Peduncles 5–185 mm; bracts 3–10, linear to linear-oblanceolate or subulate, 2–10 (–15) mm. Involucres 2.5–3 × 2.5–6 mm. Phyllaries in 4–6 series, subulate or linear-oblong, unequal, 6–8 merging down peduncles; outer 1–1.8 × 0.3–0.6 mm; inner 1.8–3 × 0.3–0.7 mm. Ray-florets 20–40; corolla white to lilac, laminae 3–6.3 mm, tubes 0.6–1.35 mm. Disc-florets 50–135; corollas 1.2–2.5 mm. Cypselae obovoid, 1.6–2.5 × 1–1.6 mm, wings 0.2–0.4 mm wide; pappus awns 0.3–0.7 mm.

Distribution

V20-825-distribution-map.gif

Ala., Ark., Fla., Ga., Ill., Ky., La., Miss., Mo., N.C., Okla., S.C., Tenn., Tex.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Phyllaries subulate; peduncles filiform Boltonia diffusa var. diffusa
1 Phyllaries linear-oblong; peduncles thick Boltonia diffusa var. interior
... more about "Boltonia diffusa"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
Vesna Karaman-Castro +  and Lowell E. Urbatsch +
Elliott +
7 +  and 12 +
not decurrent +
subulate;lanceolate or oblanceolate +
rugulose +  and muricate +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
linear +  and linear-oblanceolate or subulate +
barbellulate +  and barbellate +
2.5 cm25 mm <br />0.025 m <br /> (11.5 cm115 mm <br />0.115 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
Smallhead doll’s-daisy +
not 2-lipped +  and actinomorphic +
white +  and lilac +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
compressed;obovoid;cuneate or obcordiform +
Ala. +, Ark. +, Fla. +, Ga. +, Ill. +, Ky. +, La. +, Miss. +, Mo. +, N.C. +, Okla. +, S.C. +, Tenn. +  and Tex. +
puberulent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
hemispheric +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.63 cm6.3 mm <br />0.0063 m <br />) +
cauline +  and basal +
triangular +
not +  and winged +
entire +  and serrulate +
0.8 cm8 mm <br />0.008 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
linear;linear-oblanceolate or subulate +
reduced +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
2-carpellate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
persistent +
0.5 cm5 mm <br />0.005 m <br /> (18.5 cm185 mm <br />0.185 m <br />) +
linear-oblong +  and subulate +
Sketch Bot. S. Carolina +
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 +
Boltonia asteroides +
Boltonia diffusa +
Boltonia +
species +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.135 cm1.35 mm <br />0.00135 m <br />) +
30 cm300 mm <br />0.3 m <br /> (200 cm2,000 mm <br />2 m <br />) +
0.2mm +  and 0.4mm +