Symphyotrichum defoliatum

(Parish) G. L. Nesom

Phytologia 77: 279. 1995.

Common names: San Bernardino aster
EndemicConservation concern
Basionym: Aster defoliatus Parish Bot. Gaz. 38: 461. 1904
Synonyms: Aster bernardinus H. M. Hall Aster chilensis var. bernardinus (H. M. Hall) Cronquist
Treatment appears in FNA Volume 20. Treatment on page 538. Mentioned on page 472, 539.

Perennials, (30–) 40–100 (–150) cm, cespitose; short-rhizomatous. Stems 1–5+, ascending to erect, strigose, villous, or lanate, especially distally. Leaves (grayish green) thin to firm, margins entire, apices acute, faces strigose; basal withering by flowering, petiolate, blades narrowly oblanceolate, 50–100 (–150) × 4–12 (–15) mm, bases attenuate, margins scabrous to ciliate; proximalmost cauline often withering by flowering (often with tufts of leaves in axils), sessile, blades linear to narrowly oblong, 30–70 (–100) × 4–8 (–10) mm, bases attenuate or cuneate, apices acute; distal sessile, blades 15–80 × 2–8 (–10) mm, bases cuneate, sometimes auriculate. Heads (3–50+) in narrowly paniculiform arrays, branches 2–10 (–20) cm. Peduncles densely short-strigose, bracts 1–6, linear-oblong, strigose. Involucres campanulate, 4–7 mm. Phyllaries in 3–6 series, narrowly oblanceolate or linear (outer) to linear (inner), unequal, bases indurate, margins entire, narrowly scarious, ciliate, green zones obovate to elliptic, apices obtuse, mucronulate, faces usually strigose. Ray-florets 15–40; corollas pale violet, laminae 8–12 (–15) × 1–1.5 (–2) mm. Disc-florets 25–70+; corollas yellow, 4–6 mm, lobes triangular, 0.4–0.8 mm. Cypselae brown, cylindric to obovoid, not compressed, 1.5–3 mm, ribs 5–8, faces hairy; pappi whitish, 4–6 mm. 2n = 36.


Phenology: Flowering Aug–Nov.
Habitat: Dry open grasslands and meadows, often near springs
Elevation: 0–1700 m

Discussion

Of conservation concern.

Symphyotrichum defoliatum is known from the San Gabriel and San Bernardino mountains, and from the Peninsular Ranges, southern California.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

... more about "Symphyotrichum defoliatum"
not tailed +, rounded +  and obtuse +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
distinct +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
subequal +
scarious +
4mm +  and 8mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Parish) G. L. Nesom +
sessile +  and petiolate +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
scabrous +  and ciliate +
auriculate +, cuneate +, acute +, attenuate +, linear +  and narrowly oblong +
indurate +
4mm;8mm +
Aster defoliatus +
sessile +  and petiolate +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (8 cm80 mm <br />0.08 m <br />) +
scabrous +  and ciliate +
acute;cuneate;attenuate;linear;narrowly oblong +
2mm;8mm +
rugulose +  and muricate +
linear-oblong +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
barbellulate +  and barbellate +
subpetiolate +  and sessile +
San Bernardino aster +
not 2-lipped +  and actinomorphic +
yellow +  and pale violet +
at maturity , more or less ampliate , tubes usually shorter +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
not compressed +, cylindric +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
0–1700 m +
hairy +  and strigose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry open grasslands and meadows, often near springs +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
campanulate +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
1mm;1.5mm +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
triangular +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not +  and hyaline +
50mm;100mm +
scabrous +  and ciliate +
attenuate +  and oblanceolate +
4mm +  and 12mm +
2-carpellate +
persistent +
25 +  and 40 +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
short-strigose +
Flowering Aug–Nov. +
linear to linear +  and oblanceolate +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
5 +  and 8 +
exalbuminous +
Endemic +  and Conservation concern +
branched +  and simple +
not brittle +
ascending +  and erect +
1 +  and 5 +
appendaged +  and truncate +
papillate +  and smooth +
Aster bernardinus +  and Aster chilensis var. bernardinus +
Symphyotrichum defoliatum +
Symphyotrichum subg. Ascendentes +
species +
at maturity , more or less ampliate , tubes usually shorter +
ampliate +
100 cm1,000 mm <br />1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
40 cm400 mm <br />0.4 m <br /> (100 cm1,000 mm <br />1 m <br />) +
tree +, shrub +  and subshrub +
21 +, 18 +  and 13 +
obovate +  and elliptic +