Imperiled
Perennial herb; stems spreading to prostrate, about 60 cm long; herbage rough-hairy; leaves lance-shaped, petioles short-winged or petioles absent; flowers with a long tube and spreading petals, yellow, becoming deep red in age; petals 5-6 cm long; h...
Stem consisting of loosely attached flattened joints up to 8 cm in length by 2-3 cm in width, the joints highly varied in size and shape, bearing areoles with dense clumps of yellowish glochids; rhizomes and often larger roots also often bearing gloc...
Perennial herb; herbage glabrous; stems 2-5 dm tall; leaves mostly basal, heart-shaped to nearly round, petiolate, semisucculent, blades 2-5 cm long and across; upper stem leaves few, sessile, clasping, longer than wide; inflorescence of 1-3 flower h...
Tufted perennial, 4-15 cm tall, forming clumps up to 2 dm across, covered with white, felty or woolly tomentum; basal leaves linear or linear-oblanceolate, 2-4 cm long, 1-3 mm wide, flat or with margins rolled inwards; stem leaves reduced to small sc...
Diminutive, tufted perennial, 3-5 cm tall, forming clumps up to 2 dm across, covered with white, felty or woolly tomentum; basal leaves linear, 1-2 cm long, 1-2 mm wide, margins rolled inwards; stem leaves reduced to small scales; flower stems taller...
Carr (Brittonia 23:280 - 291, 1971) distinguishes subsp. mogollonica from subsp. parryi by its taller stems and more numerous and larger cauline leaves.
Plants perennial, glaucous (bluish); stems 3-12 dm tall; basal leaves petiolate; cauline leaves cordate-clasping or connate-perfoliate; inflorescence narrow, often more than half plant height, glandular or glabrous; flowers in dense fascicles separat...