Nabalus asper (Michx.) Torr. & A. Gray
Rough White Lettuce
Family - Asteraceae
Stem - To 170 cm long, slender to stout, hairy.
Stem and leaves.
Leaf - Roughened, abaxially pubescent, sessile to petiolate, lanceolate to oblong-elliptic. Margins entire or shallowly toothed or lobed.
Inflorescence - Narrow, cylindrical spikelike panicles or racemes.
Involucre - 12-17 mm long, +/- cylindrical, coarsely hairy.
Flower - Ligulate florets 11-14, white to pale yellow, with 6-8 mm pappus of straw-colored bristles.
Fruit - Achenes 5-6 mm long, yellowish brown.
Flowering - August - October.
Habitat - Prairies, glades, openings of mesic to dry upland forests, savannas.
Origin - Native to North America.
Other info - This striking species is similar to N. crepidineus, but the inflorescence is much
narrower. Also, the preferred habitat is drier and more open than that of N. crepidineus.
Photographs taken at Shaw Nature Reserve, Franklin County, MO, 9-8-2012, Tucker Prairie, Callaway County, MO, 8-21-2015, and Victoria Glade, Jefferson County, MO, 9-19-2016 (SRTurner).