Symphyotrichum depauperatum

(Fernald) G. L. Nesom

Phytologia 77: 279. 1995.

Common names: Starved or serpentine aster
EndemicConservation concern
Basionym: Aster depauperatus Fernald Rhodora 10: 94. 1908
Synonyms: Aster ericoides var. depauperatus Porter Aster ericoides var. pusillus A. Gray Aster parviceps var. pusillus (A. Gray) Fernald Aster pilosus var. pusillus (A. Gray) A. G. Jones
Treatment appears in FNA Volume 20. Treatment on page 510. Mentioned on page 468, 500, 511.

Perennials, 20–50 cm, colonial or cespitose; branched rhizomatous. Stems 1–3+, erect (straight, brittle), glabrate. Leaves thin, margins ciliate, abaxial faces glabrous or glabrate, adaxial sparsely strigose; basal withering by flowering (new rosettes developing at flowering), sessile, blades lanceolate to oblanceolate or spatulate, 20–40+ × 3–5+ mm, bases attenuate, margins sparsely serrate to subentire, strigose-ciliate, apices acute to obtuse; proximal cauline usually withering by flowering, sessile, blades linear-oblanceolate, ca. 30 × 2 mm, bases tapering, margins entire, scabrous, apices acute; distal sometimes withering by flowering, sessile, blades linear, 10–30 × 1.5–5 mm, reduced distally, bases cuneate or not tapering, margins entire, apices acute, ± mucronulate. Heads in open, wide, paniculiform arrays, branches arching, sometimes ± secund, abundantly bracteate. Peduncles long, gradually reduced distally on branches, glabrous or glabrate, bracts 3–17+, linear, mucronate. Involucres cylindro-campanulate, (3.2–) 3.4–4 (–4.3) mm. Phyllaries in 3–5 series, oblong-lanceolate, unequal, bases indurate 1/2–3/4, margins narrowly scarious, slightly or not erose, sparsely ciliolate or not distally, green zones lanceolate, apices acute, involute, slightly spreading, faces glabrous. Ray-florets 7–14; corollas usually white, seldom pink, laminae (3–) 3.8–5.4 (–6.2) × 0.5–1.1 mm. Disc-florets 7–17; corollas yellow becoming brown, (2.2–) 2.5–2.9 (–3.1) mm, tubes shorter than narrowly funnelform throats, lobes lanceolate, 0.3–0.6 (–0.9) mm. Cypselae yellowish-brown, obovoid, ± compressed, ± 1.2–1.3 mm, 3–4-nerved, faces sparsely to moderately strigillose; pappi white (yellowish), 2.4–3.3 mm. 2n = 16.


Phenology: Flowering Aug–Oct.
Habitat: Serpentine or diabasic soils
Elevation: 400–1000 m

Discussion

Of conservation concern.

Symphyotrichum depauperatum is federally listed in the United States.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

glabrate +  and glabrous +
not tailed +, rounded +  and obtuse +
distinct +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
reduced +
scarious +
1.5mm +  and 5mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +  and open +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Fernald) G. L. Nesom +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
acute +, not tapering +, cuneate +, tapering +, linear-oblanceolate +  and obtuse +
reduced +
indurate +
1.5mm;5mm +
Aster depauperatus +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
acute;not tapering;cuneate;acute;tapering;linear-oblanceolate;acute;obtuse +
reduced +
1.5mm;5mm +
rugulose +  and muricate +
mucronate +
bracteate +  and secund +
barbellulate +  and barbellate +
sessile +  and petiolate +
Starved or serpentine aster +
not 2-lipped +  and actinomorphic +
0.29 cm2.9 mm <br />0.0029 m <br /> (0.31 cm3.1 mm <br />0.0031 m <br />) +
yellow becoming brown +, pink +  and white +
at maturity , more or less ampliate , tubes usually shorter +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
yellowish-brown +
strigillose +  and glabrous +
compressed +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
mucronulate +
Md. +, N.C. +  and Pa. +
400–1000 m +
strigillose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Serpentine or diabasic soils +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
cylindro-campanulate +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.54 cm5.4 mm <br />0.0054 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
3.8mm;5.4mm +
2 (?) +  and 5 (?) +
0.5mm;1.1mm +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
reflexed;spreading;erect +
lanceolate +
strigose-ciliate +  and ciliate +
not +  and hyaline +
10mm;30mm +
not distally +  and ciliolate +
acute +, not tapering +, cuneate +, tapering +, linear-oblanceolate +  and obtuse +
reduced +
1.5mm +  and 5mm +
2-carpellate +
persistent +
25 +  and 40 +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
glabrate +  and glabrous +
Flowering Aug–Oct. +
oblong-lanceolate +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1mm;0.2mm +
Endemic +  and Conservation concern +
branched +  and simple +
1 +  and 3 +
appendaged +  and truncate +
papillate +  and smooth +
Aster ericoides var. depauperatus +, Aster ericoides var. pusillus +, Aster parviceps var. pusillus +  and Aster pilosus var. pusillus +
Symphyotrichum depauperatum +
Symphyotrichum sect. Symphyotrichum +
species +
funnelform-campanulate +  and cylindric +
ampliate +
rhizomatous +  and branched +
cespitose +  and colonial +
20 cm200 mm <br />0.2 m <br /> (50 cm500 mm <br />0.5 m <br />) +
tree +, shrub +  and subshrub +
lanceolate +