S3
Vulnerable
Peniocereus greggii var. greggii (Night-Blooming Cereus)
Root large, fleshy, round at the top, tapering; stems 2 m long, pale gray-green, slender, 1-2.5 cm in diameter, strongly angled by the 4-6 low, broad ribs; areoles narrowly oval about 4 mm long, white to gray woolly, bearing approximately 12 gray to ...
Penstemon alamosensis (Alamo Beardtongue)
Perennial; stems solitary or few, glabrous, 3-7 dm tall; leaves entire, opposite, basal leaves elliptic to lanceolate, stem leaves much reduced, 2-4 pairs, sessile, lanceolate; inflorescence slightly glandular, more orless secund, usually as much as ...
Penstemon breviculus (Narrow-Mouth Penstemon)
Perennial; stems 0.8-2.0 dm tall, erect, or slightly upward-curving, retrorsely puberulent; leaves mostly basal, opposite, entire or rarely few toothed, lanceolate, elliptic, or spatulate, basal leaves somewhat petiolate, stem leaves sessile; inflore...
Penstemon cardinalis ssp. cardinalis (Scarlet Penstemon)
Perennial herb; stems gray-green, glabrous, up to 70 cm tall, branching from the base; leaves opposite, entire, slightly thickened, basal leaves short petiolate, ovate to elliptic, to 12 cm long, stem leaves smaller, sessile, ovate to lanceolate; flo...
Penstemon cardinalis ssp. regalis (Guadalupe Penstemon)
Perennial herb; stems 40-100 cm tall; leaves opposite, thick, to 6 cm long and 5 cm wide, heart-shaped; inflorescence secund (one-sided), the cymules paired, well spaced, 2-flowered; calyx 4-6 mm long; corolla 26-30 mm long, red, narrowed at the mout...
Penstemon ramosus (Branching Beardtongue)
Robust heterophyllous perennials from a woody caudex; stems 3-7.5 dm tall, puberulent, often branching midway up the stem; leaves of the branches linear, about 1 mm wide and 25 mm long; leaves of the main stem 3-6 mm wide, 6-11 cm long, isophyllous a...