Psorothamnus schottii (Indigo bush)

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Psorothamnus schottii (Torr.) Barneby

Indigo bush, Schott indigobush, Schott’s dalea

Schott’s delea is native to western North America.

Plants: Large, densely branched spiny shrubs, reaching 10′ (3 m). Branches are dotted with glands.

Leaves: ½–1″ (1.3–2.5 cm) long and only 1/16″ (1.6 mm) wide, essentially needles, blue-gray or green, covered with very minute hairs that make them appear whitish. Sometimes they are in groups of two or three.

Flowers: Deep purple-blue, pea-shaped, ¼–⅜″ (7–10 mm) across, in groups of 5-20 flowers.

Fruits: Roughly egg-shaped, ¼–⅜″ (7–10 mm) long, with raised dark red spots.

Habitats: Gravelly to sandy slopes, benches, and washes, at elevations below 1969′ (600 m).

Similar species.

Online References:

CalPhotos at the University of California, Berkeley

The Lady Bird Johnson Wildflower Center

Www.worldbotanical.com (Psorothamnus)

The Jepson Manual

Dalea schottii Torr.
Dalea schottii Torr. var. puberula (Parish) Munz

2/28/2010 · Anza-Borrego Desert State Park, California · ≈ 2 × 1′ (62 × 41 cm)

5/2/2018 · Ocotillo Patch, Joshua Tree National Park, California · ≈ 7 × 4½″ (18 × 12 cm)

5/2/2018 · Joshua Tree National Park, California · ≈ 6 × 4″ (16 × 11 cm)

2/28/2010 · Anza-Borrego Desert State Park, California · ≈ 8 × 12″ (20 × 31 cm)

2/28/2010 · Anza-Borrego Desert State Park, California

5/2/2018 · Bajada Trail, Joshua Tree National Park, California · ≈ 10 × 6″ (24 × 16 cm)

5/2/2018 · Joshua Tree National Park, California · ≈ 6 × 4″ (16 × 11 cm)

5/2/2018 · Bajada Trail, Joshua Tree National Park, California · ≈ 8 × 5″ (20 × 13 cm)

5/2/2018 · Ocotillo Patch, Joshua Tree National Park, California · ≈ 7 × 4½″ (18 × 12 cm)

5/2/2018 · Joshua Tree National Park, California · ≈ 4 × 6″ (11 × 16 cm)

5/2/2018 · Ocotillo Patch, Joshua Tree National Park, California · ≈ 7 × 4½″ (18 × 12 cm)

2/28/2010 · Anza-Borrego Desert State Park, California · ≈ 14 × 9″ (35 × 23 cm)

5/2/2018 · Ocotillo Patch, Joshua Tree National Park, California · ≈ 7 × 4½″ (18 × 12 cm)

5/2/2018 · Ocotillo Patch, Joshua Tree National Park, California · ≈ 10 × 6″ (24 × 16 cm)

2/28/2010 · Anza-Borrego Desert State Park, California

Kingdom	Plantae	Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin)
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Rosidae	Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
Order	Fabales	Legumes (pea and bean families)
Family	Fabaceae	Legume family (peas and beans)
Genus	Psorothamnus	From the Greek psoros, “mangy, scabby,” and thamnos, “bush,” thus “scabshrub”
Species	schottii	After Arthur Carl Victor Schott (1814-1875), one of the naturalists of the Mexican Boundary Survey

About plant names...

Range:

About this map...

Psorothamnus schottii description by Thomas H. Kent, not updated.