Host an Event Volunteer Join Tickets

Support the plant database you love!

Share

Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

Enter a Plant Name:
Or choose a plant family:

Psorothamnus polydenius

Psorothamnus polydenius (Torr. ex S. Watson) Rydb.

Nevada Dalea

Fabaceae (Pea family)

Synonym(s):

USDA Symbol: PSPO

USDA Native Status: L48 (N)

"Stiffly angular, divaricately branching shrubs up to 0.4-1 (1.5) m tall, the stout aged stems leafless, the ultimate twigs becoming subspinose after shedding the terminal flower-racemes, the younger stems densely silky-pilosulous with retrorsely subappressed or narrowly descending lustrous hairs up to 1.5-4 mm long, and densely sprinkled with orange blister-glands (often when dried collapsing and saucer-shaped), the foliage pilosulous with loosely ascending, spreading, or subappressed hairs up to 0.25-0.5 mm long, the ashen leaflets pubescent both sides, rarely thinly so and greenish, charged beneath with 1 subapical and 1-3 pairs of livid submarginal glands;." (bibref: 1812).

"Small angularly crooked shrub, the young stems clad in lustrous deflexed hairs and dotted with many red or orange resinous blisters." (bibref: 1812).

 

From the Image Gallery

No images of this plant

Plant Characteristics

Duration: Perennial
Habit: Shrub
Leaf Arrangement: Alternate
Size Notes: "Up to 0.4-1 (1.5) m tall." (bibref: 1812).
Leaf: "Leaf-spurs subobsolete up to 1 mm long; stipules fugacious, triangular or subulate, gland-tipped, 0.4-1 mm long; leaves mostly 7-15, rarely 27 mm long, subsessile or shortly petioled, with 3-6 pairs of obovate, obovate-cuneate, or suborbicular, emarginate or retuse flat or loosely folded leaflets 1-4.5 mm long." (bibref: 1812).
Flower: "Peduncles leaf-opposed and terminal to firm tapering branchlets; racemes usually dense but not at all conelike, ovoid to globose or rarely oblong-cylindroid, without petals 10-14 mm diameter, the pilosulous axis finally 3-30 mm long; bracts deciduous, lanceolate or lance-attenuate, pilosulous dorsally, tipped with a subcapitate gland; pedicels 0.2-0.7 (0.8) mm long, charged near base and apex with pairs of small orange glands; calyx 3.9-5.3 (8.3) mm long, pilosulous externally from base upward or only on the teeth, the tube (measured to a lateral sinus) 1.9-2.8 (3) mm long, its ribs becoming prominent but remaining slender, the membranous intervals charged with 1 row of 2-4 (the ventral intervals with up to 6, more scattered) glands, the ventral sinus less deeply recessed than the lateral ones and the orifice therefore oblique, the teeth varying from triangular-acuminate to narrowly lance-acuminate or -caudate, the dorsal one longest, either a little shorter or longer than tube, the ventral pair broadest and shortest: petals marcescent, all opening pink-purple, the banner with a golden eye-spot, this and wings gland-tipped, the keel usually glandless; banner 4.6-6.1 (6.6) mm long, the antrorsely arched claw 2-2.5 (2.8) mm the ovate-cordate, emarginate or retuse blade 3.2-4.2 (4.6) mm long, 2.7-4.6 mm wide; wings 5.4-7 mm long, the claw 1.9-2.5 (2.8) mm, the narrowly oblong, obtuse or truncate-emarginate blade 4-5 (5.4) mm long, 1.5-2.1 mm wide; keel 5.7-8 mm long, the claws (1.9) 2.2-3 mm, the broadly obovate blades (3.7) 4-5.3 mm long, 2.4-3.7 mm wide; androecium 5.2-6.8 mm long, the connective gland-tipped, the anthers (0.55) 0.6-0.8 (1) mm long; ovules 2, collateral." (bibref: 1812).
Fruit: "Pod 2.5 mm long, obliquely clavate-obovoid, the style-base lateral, the valves glabrous and hyaline at base, distally rugulose, thinly pilosulous, gross-glandular; seed (seldom seen) 2-2.2 mm long." (bibref: 1812).

Bloom Information

Bloom Color: Pink , Yellow , Purple
Bloom Time: May , Jun , Jul , Aug , Sep
Bloom Notes: "Petals marcescent, all opening pink-purple, the banner with a golden eye-spot." (bibref: 1812).

Distribution

USA: CA , NV , UT
Native Distribution: "Great Basin and Mohave Desert, western Nevada, adjoining California, eastward interruptedly to extreme southwestern Utah (P. p. var. polydenius); local in Colorado Basin, east-central Utah (P. p. var. jonesii). ." (bibref: 1812).
Native Habitat: As given for the varieties. (bibref: 1812).

Additional resources

USDA: Find Psorothamnus polydenius in USDA Plants
FNA: Find Psorothamnus polydenius in the Flora of North America (if available)
Google: Search Google for Psorothamnus polydenius

Metadata

Record Modified: 2020-12-07
Research By: JAM

Go back