Much branched shrubs 1-2 m tall. Stems terete, brown, herbaceous parts densely pubescent, hairs white, 0.5-1.0 mm long. Leaves relatively consistent; petioles 1.0-4.5 cm long, partially winged, sparsely to densely pubescent, hairs 1.0 mm long; blades ovate to pentagonal (Fig. 39A-E), 3-11 cm long, 2-9 cm wide, apex acute to acuminate, margin entire to irregularly serrate, usually deeply 3-lobed, adaxial surface moderately pubescent, hairs pustular, abaxial surface nearly glabrous to densely glandular and pubescent, hairs 1.0 mm long. Peduncles 1-13 cm long, glabrous to densely glandular and pubescent, hairs 1.5 mm long. Heads erect, 1.5-2.0 cm diam in flower, 2.5-3.5 in fruit, solitary to few in cymose synflorescences. Phyllaries 10, biseriate, equal to subequal, reflexed, ovate, 5-9 mm long, 3.5-5.0 mm wide, green, apex acute, rounded or acuminate, margin ciliate, entire, abaxial surface moderately pubescent, hairs 0.5-1.0 mm long, adaxial surface moderately pubescent on distal half, hairs 0.5 mm long. Ray florets ca. 10; corollas white, ligules oblong, 14-16 mm long, 4-6 mm wide, apex rounded to 2-notched, adaxial surface sparsely pubescent on the veins, abaxial surface moderately glandular, tube 1.0 mm long, 0.5 mm wide, sparsely pubescent, hairs 0.5-1.0 mm long. Disc florets (Fig. 39F) 60-80; corollas yellow, tube 1.0-1.5 mm long, 0.5 mm diam, glabrous, throat cylindrical, 3.5-4.0 mm long, 1.5 mm diam, sparsely pubescent, lobes 5, 1.0-1.5 mm long, 0.5-0.75 mm wide, apex acute, cells along the margin black, densely pubescent, hairs thick, 0.5-1.0 mm long; stamens with filaments 3-4 mm long, 0.2 mm wide, anthers not fully exserted from corolla, thecae black, 2.5-3.0 mm long, 0.5 mm wide, apical appendages black (Fig. 39F), acuminate to very long-acuminate, 1.0 mm long, 0.25 mm wide, abaxial surface of apical appendage glandular; styles (Fig. 39G) yellow, 5.5-6.75 mm long, enlarged at base, stigmatic surface yellow, 1.5-2.0 mm long, apical appendages black, acuminate, 0.5-0.75 mm long, 0.4-0.5 mm wide. Pales at anthesis narrowly triangular (Fig. 39H), 7-8 mm long, 1.5 mm wide, light yellow, apex long-acuminate, margin entire, abaxial surface sparsely pubescent, hairs 0.5-l.0 mm long, adaxial surface glabrous; pales at fruiting persistent, narrowly triangular (Fig. 39I), 14-16 mm long, 4.0 mm wide, indurate with prominent parallel veins, stramineous, apex long-acuminate, indurate, margin glabrous, entire, abaxial and adaxial surfaces glabrous. Achenes brown-black, 3.5 mm long, 1.5 mm wide, smooth. Chromosome number unknown.
Funk, V. A. "The Systematics of Montanoa (Asteraceae, Heliantheae)" in Memoirs of the New York Botanical Garden. Vol. 36. The New York Botanical Garden. Bronx, NY. 1982.
Chromosome number is unknown.