Adenostoma sparsifolium

Torrey in W. H. Emory

in W. H. Emory, Not. Milit. Reconn.,140. 1848

Common names: Red shank ribbon bush
Found in FNA Volume 9. Treatment on page 394. Mentioned on page 393.
Plants erect, 20–60 dm. Stems erect to spreading; bark distinctively cinnamon-colored, papery-layered; young stem internodes yellowish green, 1.5–7(–15) mm (marked with slender paired decurrent grooves), finely hirtellous, sessile-glandular. Leaves on slender long shoots, proximal 1–2 opposite, distal subalternate or alternate; stipules absent; blade yellow-green, linear to terete, (2.5–)5–14(–26) × 0.4–0.6(–0.8) mm, apex recurved-apiculate, surfaces sparsely hirtellous and sessile-glandular. Inflorescences paniculate or reduced to spicate racemes (terminating all distal, long shoots of season), 0.8–5(–7.5) cm, hirtellous; subtending flower bracts linear-subulate; bracteoles 5 or 6, outermost subulate, inner oblong-ovate, concave. Pedicels present or absent. Flowers in sessile clusters of 2–3 (or single and pedicellate); hypanthium greenish, 0.6–2 mm, hirtellous, inner rims yellowish; sepals broadly ovate, 0.6–1 mm; petals persistent, whitish, turning rusty brown, elliptic to ovate, 1.5–2.2 mm; stamens 10(–12), filaments 1–1.5 mm, anthers 0.4–0.6 mm; ovaries obliquely obovoid; styles erect, pinkish, 0.5–1 mm. Achenes ellipsoid, 1.1–1.6 mm, exserted from hypanthium. 2n = 18.

Phenology: Flowering Jul–Aug(–Sep).
Habitat: Dry granitic slopes, mesas, ravines, chaparral, pinyon woodlands
Elevation: 200–2000 m


Calif., Mexico (Baja California).


Adenostoma sparsifolium is known in southern California from San Luis Obispo and Santa Barbara to Riverside and San Diego counties, and in northern Baja California.



AuthorWilliam Jones + and James Henrickson +
Common nameRed shank + and ribbon bush +
Elevation200–2000 m +
HabitatDry granitic slopes, mesas, ravines, chaparral, pinyon woodlands +
IllustratorMarjorie C. Leggitt +
PhenologyFlowering Jul–Aug(–Sep). +
ReferenceNone +
Taxon nameAdenostoma sparsifolium +
Taxon parentAdenostoma +
Taxon rankspecies +
VolumeVolume 9 +