G4
Apparently Secure
Penstemon deaveri (Mt. Graham Beardtongue)
Plants perennial, robust; stems, 2-6 dm tall, pubescent; inflorescence puberulent, not glandular, narrow; corolla varying from blue-purple to violet-purple or lavender, 16-25 mm long, widely inflated, base of lower lobes (sparsely to) moderately whit...
Penstemon lentus (Abajo Penstemon)
Perennial herb, 3-5 dm tall; herbage glaucous, glabrous; stems ascending to erect, 1-few; leaves 2-11 cm long, 5-30 mm wide, fleshy, entire, the basal and lower stem leaves petiolate, spatulate, the upper leaves sessile, ovate to lanceolate; inflores...
Penstemon neomexicanus (New Mexico Beardtongue)
Plants perennial, glabrous; stems stout, 3-6 dm tall; leaves opposite, basal usually withered at flowering time, stem leaves narrowly lanceolate; inflorescence one-sided, narrow, not glandular; calyx lobes lanceolate, 4-8 mm long; corolla blue, purpl...
Penstemon superbus (Superb Beardtongue)
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...
Philadelphus argyrocalyx (Silvercup Philadelphus)
Erect shrub 1-2 m tall; leaves opposite, ovate, ovate-lanceolate or narrowly elliptic, margins entire, 10-35 mm long, 4-17 mm wide, glabrous or glabrescent above, sparsely villous hairy below, petiole about 2 mm long; flowers usually solitary (rarely...