Montanoa andersonii  

Shrubs to small trees 3-7 m tall. Stems terete, grooved, brown, herbaceous parts moderately pubescent with reddish or brownish-white appressed hairs. Leaves variable; petioles 2.0-18.5 cm long, occasionally with auricles at distal end, moderately pubescent, hairs reddish, 0.5-1.0 mm long; blades ovate to pentagonal (Fig. 37A-G), 6.5-18.5 cm long, 3.0-17.5 mm wide, apex long-acuminate, margin entire to irregularly serrate, adaxial surface dark green, sparsely to moderately pubescent, hairs pustular, abaxial surface paler green, moderately glandular, hairs in axils of major veins. Peduncles 0.3-1.0 cm long, densely pubescent, hairs less than 1.0 mm long. Heads erect, less than 1.0 cm diam in flower, ca. 1.0 cm diam in fruit, few to several in dense cymose synflorescences in oppositely and alternately branched compound corymbs. Phyllaries 3-6, more or less biseriate, elliptic or ovate-lanceolate, loosely reflexed, 3-5 mm long, l.0-1.5 mm wide, green, apex obtuse or mucronate, margin ciliate, entire, abaxial surface densely pubescent, hairs 0.5-1.0 mm long, adaxial surface glabrous. Ray florets 7-8; corollas white, ligules elliptic to obovate, 20-35 mm long, 4-6 mm wide, apex truncate to 2-notched, adaxial surface glabrous, abaxial surface sparsely glandular and pubescent, hairs 0.5-1.0 mm long, tube 1.0 mm long, 0.5 mm wide, glabrous. Disc florets (Fig. 37H) 25-35; corollas yellow, tube 1.5 mm long, 0.3-0.5 mm diam, moderately glandular and pubescent, hairs 0.5-1.0 mm long, throat narrowly cylindrical, 4.0-4.5 mm long, 1.0-1.5 mm diam, sparsely glandular and pubescent especially on veins, hairs less than 0.5 mm long, lobes 5, 1.0-1.2 mm long, 0.5 mm wide, apex acute to narrowly acute, densely glandular and pubescent, hairs less than 0.5 mm long; stamens with filaments 5.0-5.5 mm long, 0.2 mm wide, anthers fully exserted from corolla (Fig. 37H), thecae brown to purple, 2.5-3.0 mm long, 0.5 mm wide, apical appendages yellow, usually with purple on tip, narrowly acute to acute, 0.5-0.7 mm long, 0.25-0.3 mm wide, glabrous; styles yellow, 10.0-11.5 mm long, enlarged at base, stigmatic surface yellow, 1.0 mm long, apical appendage yellow with purple, acuminate, 0.5 mm long, 0.25 mm wide. Pales at anthesis ovate-triangular (Fig. 37I), 5-6 mm long, 1.5-3.0 mm wide, light yellow sometimes with purple on distal half, apex long-acuminate, indurate, often purple, margin ciliate, entire, abaxial surface densely glandular near center and pubescent on the veins, hairs 0.5-1.0 mm long, adaxial surface glabrous; pales at fruiting and achenes not available. Chromosome number unknown.

From 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.