Amsonia tomentosa var. tomentosa
Plants significantly heterophyllous. Stem leaves: petiole 1.5–5 mm; blade ovate to lanceolate (narrowly elliptic to elliptic), (2–)3–5.3 cm × (6–)8–27 mm, base convex (often attenuate basally) to rounded or cuneate. Branch leaf blades lanceolate to narrowly elliptic, 2.2–3.7 cm × 4–13 mm. Corolla lobes white to bluish, pinkish, or purplish white (blue to pink in bud) or pale blue to blue. 2n = 22.
Phenology: Flowering spring; fruiting late spring–summer.
Habitat: Sandy washes, deserts, rocky slopes and gullies, limestone or granitic alluvial fans.
Elevation: 600–1900 m.
Distribution
Ariz., Calif., Nev.
Discussion
Variety tomentosa is known from a relatively cohesive region that includes the northwestern to north-central quarter of Arizona, southeastern Nevada, and three neighboring counties of southeastern California.
Selected References
None.
Lower Taxa
None.