Flora of North America species comparison

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Raillardella pringlei

Raillardella scaposa
Raillardella pringlei

showy raillardella

green leaf raillardella, greenleaf silvermat, stem raillardella
Habit Plants 25–50+ cm. Plants 6–53 cm.
Leaf

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

blades lanceolate or oblanceolate to linear, margins entire, faces stipitate-glandular, sometimes sparsely scabrellous as well.
Ray florets

6–13;

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

0 or 1–7;

corollas yellow to yellow-orange, laminae 5–25+ mm.
Disc florets

45–80+;

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

7–44;

corollas yellow to yellow-orange, 7.5–12 mm.
2n

= 34.

= 68, 70.

Raillardella pringlei

Raillardella scaposa
Phenology Flowering Jul–Oct. Flowering Jun–Sep.
Habitat Meadows, stream banks, seeps Wet to dry, often sandy sites
Elevation 1200–2300 m [3900–7500 ft] 2000–3500 m [6600–11500 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.)

Variation among populations of Raillardella scaposa spans the morphologic and ecologic divide between R. argentea and R. pringlei; R. scaposa is evidently an allopolyploid that descended from ancestors closely related to each of the other two species. Raillardella scaposa is widely distributed in the Sierra Nevada and southern Cascade Range, often near populations of R. argentea. Putative hybrids between R. scaposa and R. argentea have been noted (e.g., R. Snow 293, UC, from Tuolumne County, California).

(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. argentea, R. pringlei
Synonyms Railliardia scaposa
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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