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Photo is of parent taxon

indigo bush, Napa false indigo, Napa false indigo or indigo-bush

Habit Shrubs glabrous or glabrate.
Leaflets

blade surfaces glabrous, except midveins adaxially pubescent.

Calyces

tube glab-rous or sparsely short-pilose;

lobes 0.4–0.8(–1) mm.

Amorpha californica var. napensis

Phenology Flowering May–Jul.
Habitat Wooded or chaparral slopes.
Elevation 100–600 m. (300–2000 ft.)
Distribution
from FNA
CA
[BONAP county map]
Discussion

Of all taxa of Amorpha in the flora area, A. californica is one of the most distinctive, due to the presence of spinelike glands. Of the two varieties, var. californica is the more widespread and common, with var. napensis a localized endemic in a small portion of northern California (Marin, Napa, and Sonoma counties). At this time, var. napensis is not listed by the state of California or any federal agency.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Amorpha > Amorpha californica
Sibling taxa
A. californica var. californica
Name authority Jepson: Man. Fl. Pl. Calif., 556. (1925)
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