72c. Solidago rigida Linnaeus subsp. glabrata (E. L. Braun) S. B. Heard & Semple, Canad. J. Bot. 66: 1807. 1988.
Solidago rigida var. glabrata E. L. Braun, Rhodora 44: 3. 1942; Aster jacksonii Kuntze; Leioligo corymbosa (Elliott) Rafinesque; Oligoneuron jacksonii (Kuntze) Small; O. rigidum var. glabrata (E. L. Braun) G. L. Nesom; Solidago corymbosa Elliott; S. jacksonii (Kuntze) Fernald; S. rigida var. laevicaulis Shinners
Stems 40–95 cm . Leaves and stems glabrous or hispid (stems 0–25 hairs/mm 2 ; leaves 0–20 hairs/mm 2 ). Leaves: basal to 250 × 40 mm; mid to distal lanceolate to ovate, sometimes rhombic, thin. Heads usually compact, flat-topped arrays (2–)4–14(–24) × 5–15(–24.5) cm. Peduncles sparsely to moderately hispid. Phyllaries outer glabrous; inner linear oblanceolate, 0.8–1.4 mm wide, glabrous. Disc corolla lobes 1–1.6 mm. Cypselae glabrous. 2n = 18.
Flowering Sept–Oct(–Nov). Prairies, glades, savannas, dry open areas, especially on calcareous soils; 0–300 m; Ala., Ark., Ga., Ky., La., Miss., Mo., N.C., Ohio, S.C., Tenn., Tex.
Apart from the differences stated above, subsp. glabrata is quite similar to subsp. rigida. Oligoneuron corymbosum Small is illegitimate.
