Flora of North America species comparison

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Raillardella pringlei

Raillardella argentea
Raillardella pringlei

showy raillardella

silky railardella, silky raillardella, silvery raillardella
Habit Plants 25–50+ cm. Plants 1–15 cm.
Leaf

blades lanceolate or oblanceolate to linear, margins entire or toothed, faces glabrous or ± stipitate-glandular (distal).

blades oblanceolate, margins entire or toothed, faces sericeous (silvery), sometimes sparsely stipitate-glandular as well.
Ray florets

6–13;

corollas orange to red-orange, laminae 6–20+ mm.

0.
Disc florets

45–80+;

corollas orange to red-orange, 8–11.5 mm.

7–26;

corollas yellow, 6–11 mm.
2n

= 34.

= 34, 36.

Raillardella pringlei

Raillardella argentea
Phenology Flowering Jul–Oct. Flowering Jul–Sep.
Habitat Meadows, stream banks, seeps Dry, exposed, often gravelly sites
Elevation 1200–2300 m [3900–7500 ft] 1800–3900 m [5900–12800 ft]
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; NV; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Raillardella pringlei occurs on serpentine-derived soils in the Klamath Ranges.

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

Raillardella argentea occurs widely in the Sierra Nevada and southern Cascade Range and locally in the Klamath Ranges, San Bernardino Mountains (Mt. San Gorgonio), and western ranges of the Great Basin. Artificial hybrids with R. pringlei are completely fertile and vigorous (D. W. Kyhos et al. 1990); the two species are not known to co-occur in nature.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Parent taxa Asteraceae > tribe Heliantheae > subtribe Madiinae > Raillardella Asteraceae > tribe Heliantheae > subtribe Madiinae > Raillardella
Sibling taxa
R. argentea, R. scaposa
R. pringlei, R. scaposa
Synonyms Railliardia argentea
Name authority Greene: Bull. Torrey Bot. Club 9: 17. (1882) (A. Gray) A. Gray: in W. H. Brewer et al., Bot. California 1: 417. (1876)
Source FNA vol. 21, p. 257. Treatment authors: Bruce G. Baldwin, John L. Strother. FNA vol. 21, p. 257. Treatment authors: Bruce G. Baldwin, John L. Strother.
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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