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.

Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Fernald) G. L. Nesom +
Aster depauperatus +
Starved or serpentine aster +
Md. +, N.C. +  and Pa. +
400–1000 m +
Serpentine or diabasic soils +
Flowering Aug–Oct. +
Endemic +  and Conservation concern +
Aster ericoides var. depauperatus +, Aster ericoides var. pusillus +, Aster parviceps var. pusillus +  and Aster pilosus var. pusillus +
Symphyotrichum depauperatum +
Symphyotrichum sect. Symphyotrichum +
species +