Symphyotrichum subulatum var. squamatum

(Sprengel) S. D. Sundberg

Sida 21: 908. 2004.

Common names: Southeastern annual saltmarsh aster
Introduced
Basionym: Conyza squamata Sprengel Syst. Veg. 3: 515. 1826
Synonyms: Symphyotrichum squamatum (Sprengel) G. L. Nesom
Treatment appears in FNA Volume 20. Treatment on page 482. Mentioned on page 481.

Plants 30–150 cm. Stems simple or branched basally. Heads 30–100 in open, diffuse arrays, secund on primary branches longer than peduncles. Involucres 5–7 (–8) mm. Phyllaries 18–24 (–30), subulate to lanceolate (often broadly so), green zones broadly lanceolate, absent from proximal portion. Ray-florets 21–28 (–38) in (2–) 3 series; laminae white (drying white or lavender), 1.3–1.7 (–2) × 0.2–0.3 mm, shorter than pappi, drying in inward curls, rarely coiling. Disc-florets (3–) 7–14, 4–4.9 mm. Cypselae 1.5–2.6 (–3) mm; pappi 4–5.1 (–5.3) mm. 2n = 20.


Phenology: Flowering Jul–Nov.
Habitat: Salt marshes, brackish marshes
Elevation: 0–10 m

Distribution

V20-1086-distribution-map.gif

Introduced; Ala., Fla., La., N.C., Tex., Bermuda, South America, in Europe (France), Asia (Iraq), Asia (Japan), Australia, and elsewhere

Discussion

The name Aster subulatus Michaux var. sandwicensis (A. Gray ex H. Mann) A. G. Jones (Brinttonia 36: 465. 1984) has priority at the varietal level; the combination in Symphyotrichum has yet to be made.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
open +  and in open , diffuse arrays , secund on primary branches longer than peduncles +
indeterminate +  and determinate +
in open , diffuse arrays , secund on primary branches longer than peduncles +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Sprengel) S. D. Sundberg +
sessile +, subpetiolate +, petiolate +  and long-petiolate +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
subentire +, attenuate +, subulate +, lanceolate +, rounded +  and cuneate +
indurate +
1.5mm;10mm +
Conyza squamata +
sessile +, subpetiolate +, petiolate +  and long-petiolate +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (11.3 cm113 mm <br />0.113 m <br />) +
narrowly lanceolate;subulate +
0.5mm;5.5mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
sessile +  and subpetiolate +
Southeastern annual saltmarsh aster +
not 2-lipped +  and actinomorphic +
tinged with purple +, lavender +, pink +  and white +
at maturity , more or less ampliate , tubes usually shorter +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
light-brown +  and purple +
glabrate +  and strigillose +
compressed +, narrowly obovoid +  and fusiform +
0.4 cm4 mm <br />0.004 m <br /> (0.49 cm4.9 mm <br />0.0049 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
Ala. +, Fla. +, La. +, N.C. +, Tex. +, Bermuda +, South America +, in Europe (France) +, Asia (Iraq) +, Asia (Japan) +, Australia +  and and elsewhere +
0–10 m +
strigillose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Salt marshes, brackish marshes +
in open , diffuse arrays , secund on primary branches longer than peduncles +
indeterminate +
in open , diffuse arrays , secund on primary branches longer than peduncles +
heterogamous +  and homogamous +
each +  and sessile +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
cylindric;turbinate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
1.3mm;1.7mm +
0.2mm;0.3mm +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
less spreading;erect +
triangular +
sessile +, subpetiolate +, petiolate +  and long-petiolate +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
purple-tinged +  and hyaline +
20mm;100mm +
strigilloso-ciliolate +
subentire +, attenuate +, subulate +, lanceolate +, rounded +  and cuneate +
1.5mm +  and 10mm +
2-carpellate +
0.51 cm5.1 mm <br />0.0051 m <br /> (0.53 cm5.3 mm <br />0.0053 m <br />) +
persistent +
25 +  and 40 +
0.4 cm4 mm <br />0.004 m <br /> (0.51 cm5.1 mm <br />0.0051 m <br />) +
open +  and in open , diffuse arrays , secund on primary branches longer than peduncles +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
in open , diffuse arrays , secund on primary branches longer than peduncles +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Jul–Nov. +
subulate +  and lanceolate +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
Introduced +
branched +  and simple +
not brittle +
appendaged +  and truncate +
papillate +  and smooth +
Symphyotrichum squamatum +
Symphyotrichum subulatum var. squamatum +
Symphyotrichum subulatum +
variety +
at maturity , more or less ampliate , tubes usually shorter +
ampliate +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
30 cm300 mm <br />0.3 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
lanceolate +