Psorothamnus arborescens var. minutifolius
Psorothamnus arborescens (Torr. ex A. Gray) Barneby var. minutifolius (Parish) Barneby
Fabaceae (Pea family)
Synonym(s): Dalea fremontii var. minutifolia
USDA Symbol: PSARM
"Habitally like P. a. var. arborescens, but more commonly glabrescent or glabrate, nevertheless sometimes densely gray-villosulous; old branches ashen or stramineous, usually much contorted and ligneous; hairs on leaf and calyx up to (0.2) 0.3-0.5 mm long, the foliage varying from bright yellowish-green to canescent." (bibref: 1812).
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Plant CharacteristicsDuration: Perennial
Leaf Arrangement: Alternate
Size Notes: "3-10 dm tall." (bibref: 1812).
Leaf: "Leaves up to 3.5 (5.5) cm long, the leaflets loosely pubescent to glabrous, lanceolate to rhombic-ovate or -elliptic, obtuse or subacute, 3-13 (17) mm long, some at least 2.5 mm wide." (bibref: 1812).
Flower: "Flower a little smaller than that of P. a. var. arborescens, Calyx 5-6.8 mm long, the tube 3-4.2 mm, the teeth 1.8-3.7 mm long, calyx-tube glabrate or only minutely puberulent; petals either indigo blue or violet, the banner 7.6-9 mm, its claw 1.8-2.2 mm, its blade 6.4-7.2 mm long, 4-7.4 mm wide; keel 8.4-10.3 mm long, its blades 6.3-8.2 mm long, 3.5-4.8 mm wide." (bibref: 1812).
Fruit: "Pod obliquely ellipsoid or ovoid-ellipsoid, the subcompressed body 8-10 mm long, (3.6) 4-6 mm diameter, at least beyond the middle 2-carinate by the sutures, the convex valves charged with large, round or broadly elliptic blister-glands, between the glands glabrous, the ventral suture ciliolate; seed (4.7) 5-6 mm long." (bibref: 1812).
Bloom InformationBloom Color: Blue , Violet
Bloom Time: Apr , May , Jun
Bloom Notes: "Petals either indigo blue or violet." (bibref: 1812).
DistributionUSA: CA , NV
Native Distribution: "Locally common through west-central and northern Mohave Desert, California, from northeastern Kern County (Rand and El Paso mountains) north to south Mono County (lower Owens Valley and near Benton), east to west-central San Bernardino County (Ord and Calico mountains, where overlapping and confluent with P. a. var. arborescens) and in Inyo County to Death Valley, thence extending across the Last Chance and Funeral ranges into the south point of Esmeralda and extreme southern Nye County, Nevada." (bibref: 1812).
Native Habitat: "Rocky and sandy desert hillsides, canyon-benches, sometimes on talus under cliffs, 150-1890 m (500- 6300 ft)." (bibref: 1812).
BibliographyBibref 1812 - Daleae imagines : an illustrated revision of Errazurizia Philippi, Psorothamnus Rydberg, Marina Leibmann, and Dalea Lucanus emend. Barneby, including all species of Leguminosae tribe Amorpheae Borissova ever referred to Dalea (1977) Barneby, Rupert C.
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Additional resourcesUSDA: Find Psorothamnus arborescens var. minutifolius in USDA Plants
FNA: Find Psorothamnus arborescens var. minutifolius in the Flora of North America (if available)
Google: Search Google for Psorothamnus arborescens var. minutifolius
MetadataRecord Modified: 2020-12-07
Research By: JAM