Montanoa laskowskii  

Shrubs 2-5 m tall. Stems terete, light brown to grey, usually glabrous but sometimes pubescent at nodes. Leaves variable; petioles 1.5-7.5 cm long, adaxial surface sparsely glandular and densely pubescent, hairs less than 1.0 mm long, partially to completely winged often with auricles at base of wing and usually with two small leaf-like structures at proximal end; blades ovate, 5-16 cm long, 2.25-15.0 cm wide, apex long-acuminate, margin serrate to irregularly serrate-dentate, deeply 3-lobed, adaxial surface moderately pubescent, hairs pustular, base white, abaxial surface glabrous to sparsely glandular and pubescent, hairs less than 1.0 mm long. Peduncle 2.0-7.5 cm long, glabrous to densely pubescent, hairs less than 1.0 mm long. Heads pendulous, 1.5-2.25 cm diam in flower, 2.5-3.0 cm diam in fruit, few in open rigidly branched cymose synflorescences in oppositely and alternately branched compound corymbs. Phyllaries 8-10, reflexed at late anthesis, biseriate, subequal, ovate to ovate-lanceolate, 4.5-5.5 mm long, 1.5-2.0 mm wide, dark green, apex acute to acuminate with mucronate tips, margin ciliate, entire, abaxial surface pubescent near center and margins, hairs less than 1.0 mm long, adaxial surface essentially glabrous .. Ray florets 10-15; corollas white, ligules obovate, 15.0-22.5 mm long, 5-12 mm wide, apex rounded to 1-2-notched, adaxial surface mostly glabrous with dense cluster of thick hairs, abaxial surface sparsely glandular and pubescent on veins, hairs less than 0.5 mm long, tube 1.0 mm long, 0.5 mm wide, essentially glabrous. Discflorets 65-85; corollas yellow, tube 0.5-1.0 mm long, 0.5 mm diam, sparsely pubescent, hairs thick, 0.5-1.0 mm long, throat cylindrical, 5.5-6.5 mm long, 1.5-1.75 mm diam, densely glandular and pubescent, hairs thick, 0.5-1.0 mm long, lobes 5, 0.5-1.0 mm long, 0.5-0.75 mm wide, apex acute, densely glandular and pubescent, hairs thick, less than 0.5 mm long; stamens with filaments 4.0-4.5 mm long, 0.25 mm wide, anthers not fully exserted from corolla, thecae black, 2-3 mm long, 0.5 mm wide, apical appendages black, acuminate, 0.5 mm long, 0.4 mm wide, abaxial surface of apical appendages and connective landular; styles (Fig. 67I) yellow, 8.0-11.5 mm long, enlarged at base, stigmatic slllfaces yellow, 1.0-3.0 mmlong, apical appendages yellow, acuminate, 0.5-1.0 mm long, 0.5 mm wide. Pales at anthesis almost elliptic-triangular, 3.5-4.5 mm long, 1.2 mm wide, dark near midrib and base, apex longacuminate, indurate, light yellow, margin ciliate, entire, abaxial surface, except near apex, densely glandular and pubescent, hairs 0.5-1.0 mm long, adaxial surface glabrous; pales at fruiting, deciduous, obtrullate, 8-12 mm long, 4-5 mm wide, papery with netted venation, stramineous, at apex a deep sinus and spinose tip 2 mm long, margin entire, somewhat curled, abaxial and adaxial surfaces essentially glabrous. Achenes brown-black, 3.0-4.5 mm long, 1.5-2.0 mm wide, smooth. Chromosome number, n = 19.