29.
Solidago arguta
Aiton, Hort. Kew. 3: 213. 1789.
Cut-leaf or sharp-leaved or Atlantic goldenrod
Aster argutus
(Aiton) Kuntze
Plants
50—120 cm; caudices branching.
Stems
1 usually, erect, round, proximally glabrous, strigose in arrays.
Leaves:
basal and proximal cauline tapering abruptly to winged, thin petioles, blades broadly ovate, 100—300 × 30—100 mm, margins sharply serrate, apices acute to acuminate, adaxial faces glabrous or slightly scabrous, or sometimes strigose or strigillose; mid to distal cauline sessile, lanceolate, 50—72 × 10—14 mm, reduced distally, becoming entire.
Heads
25—250, secund, in open, leafy, paniculiform arrays with recurved branches (sometimes elongate), branches and peduncles hairy.
Peduncles
1.5—3 mm, glabrous or moderately short hispido-strigose, bracteoles 1—5, lanceolate-oblong, often grading into phyllaries.
Involucres
2.5—4.5(—5) mm.
Phyllaries
in 3—4 series, unequal; outer ovate, acute, inner linear-oblong, ciliate, obtuse.
Ray florets
2—8; laminae 4—4.5 × 0.4—0.6 mm.
Disc florets
8—20; corollas 3.5—4 mm, lobes 0.6—1.5 mm.
Cypselae
1.5—2 mm, distinctly ridged, glabrous or strigose distally;
pappi
3—3.5 mm.
Subspecies 2 (2 in the flora): North America.
Solidago arguta
is reputedly in Ohio but its presence there is unconfirmed. The species includes a number of regional and ecotypal races investigated by G. H. Morton (1973, 1975). A. Cronquist (1980) is followed here.
SELECTED REFERENCE
Morton, G. H. 1973. The Taxonomy of the Solidago
arguta—boottii
Complex. Ph.D. dissertation. University of Tennessee.
