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Symphyotrichum georgianum
(Alexander) Nesom
Family:
Asteraceae
Georgia American-Aster,
more...
georgia aster
Images
not available
FNA
Resources
Luc Brouillet, John C. Semple, Geraldine A. Allen, Kenton L. Chambers, Scott D. Sundberg+ in Flora of North America (vol. 20)
Perennials,
50-100 cm, colonial; rhizomatous, woody.
Stems
1-5+, erect, straight (± stout, light to dark brown), proximally sparsely to moderately short-strigose, distally densely so, stipitate-glandular.
Leaves
(dark green) thick, firm, margins revolute (sometimes ± undulate), scabrous; basal early deciduous, sessile or subpetiolate, blades spatulate to obovate [size unknown], bases cuneate, margins entire to ± serrate, apices acute, faces finely scabrous; proximal cauline withering by flowering, sessile, blades (adaxially obscurely veined) oblong to lanceolate or narrowly obovate to oblanceolate, proximalmost ± pandurate, 20-70 × 10-20 mm, gradually reduced distally, bases auriculate-clasping, margins entire, finely scabrous, faces finely scabrous, stipitate-glandular; distal sessile, blades lanceolate to oblanceolate, 14-50 × 6-11 mm, reduced distally (much smaller on branches and grading ± abruptly into bracts), bases ± auriculate-clasping to subclasping, margins entire, apices mucronate to white-spinulose, faces scabrous, sometimes sparsely to moderately stipitate-glandular.
Heads
in narrow, racemiform to ± broad, paniculiform arrays, sometimes borne singly on branches, branches initially patent then ascending, leafy.
Peduncles
densely short-strigose, ± densely short-stipitate-glandular, bracts 1-8+, spreading to reflexed, linear to narrowly oblong-lanceolate, strigillose, stipitate-glandular, grading into phyllaries.
Involucres
campanulate to hemispheric, 8-10 mm.
Phyllaries
in 4-7 series, spatulate-oblong to lanceolate, unequal, innermost linear-lanceolate, bases tan, ± indurate in proximal
1
/ 3 -
1
/ 2 , margins hyaline, not (outer) to narrowly scarious, strigoso- or hispido-ciliate, sometimes also stipitate-glandular (foliaceous apices), green zones lanceolate-spatulate, covering distal
1
/ 2 or less, foliaceous apically, apices acute (outer) to acuminate or ± caudate (inner), spreading or reflexed (longer, inner), often purplish, faces moderately strigillose, stipitate-glandular.
Ray florets
12-24; corollas lavender violet to dark reddish purple, laminae 14-24 × 1.5-3.5 mm.
Disc florets
20-40; corollas white with purplish lobes, 7-9 mm, throats cylindro-funnelform (sparsely pilose), lobes narrowly triangular, 0.7-1.5 mm (sparsely glandular).
Cypselae
gray-brown, narrowly obovoid, compressed, 2.5-4 mm, 7-10-nerved, faces sparsely strigose;
Flowering Oct-Nov. Sandy and clay soils, oak-pine woodlands, road embankments (mostly Piedmont); of conservation concern; 0-300 m; Ala., Fla., Ga., N.C., S.C.
Symphyotrichum georgianum
is disjunct and rare in southwestern Georgia and Leon County, Florida.
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