Castilleja minor var. exilis

(A. Nelson) J. M. Egger

Phytologia 90: 72. 2008.

Common names: Alkaline or annual paintbrush Great Basin thread-torch
IllustratedEndemic
Basionyms: Castilleja exilis A. Nelson Proc. Biol. Soc. Wash. 17: 100. 1904
Treatment appears in FNA Volume 17. Treatment on page 631. Mentioned on page 627, 630.

Herbs 2–8 (–11) dm. Stems: hairs (sparse to) dense, moderately long, stiff to ± soft, eglandular or sparsely stipitate-glandular. Leaves linear-lanceolate to lanceolate, coarse, margins plane. Bracts distally red to pale orange, sometimes yellow, linear-lanceolate to lanceolate, apex narrowly acute to acuminate. Calyces 14–20 (–25) mm; abaxial and adaxial clefts 6–12 (–15) mm, 33–67% of calyx length, lateral 1–3 mm, 20% of calyx length; lobes linear or narrowly triangular, apex acute or acuminate. Corollas 13–25 (–30) mm; beak included to more often partially exserted from calyces, adaxially green, yellowish, pale orange, or pale reddish, rarely whitish, 5–7 (–10) mm; abaxial lip whitish, pale green, or pale yellowish.


Phenology: Flowering Apr–Oct(–Nov).
Habitat: Alkaline marshes, hot springs, seeps, stream banks, shores, dune swales.
Elevation: 400–2500 m.

Distribution

B.C., Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo.

Discussion

Variety exilis is the most widespread variety of Castilleja minor, and it essentially replaces var. minor from the northern portions of New Mexico and Arizona northward, throughout much of the Intermountain West. Compared to var. minor, the plants of var. exilis tend to be wider and more robust, with broader, coarser, often lanceolate and acuminate-tipped leaves, greenish abaxial corolla lips, and coarser, spreading stem pubescence.

Selected References

None.

Lower Taxa

None.

0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
pale yellowish +, pale green +  and whitish +
J. Mark Egger +, Peter F. Zika +, Barbara L. Wilson +, Richard E. Brainerd +  and Nick Otting +
(A. Nelson) J. M. Egger +
Castilleja exilis +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
not +, leathery +  and fleshy +
yellow;distally red;pale orange +
linear-lanceolate +  and lanceolate +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
yellowish green +  and green +
2-lobed +, lobed +  and tubular +
1.4 cm14 mm <br />0.014 m <br /> (2 cm20 mm <br />0.02 m <br />) +
taprooted;fibrous-rooted or rhizomatous +
fleshy +  and woody +
Alkaline or annual paintbrush +  and Great Basin thread-torch +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
purple +, pink +, red +, orange +, yellow +, white +, green +  and pale greenish +
colored +, green +, red-violet +, red +, deep +, white +  and yellow +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
B.C. +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wash. +  and Wyo. +
400–2500 m. +
spreading-hairy +  and glabrous +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Alkaline marshes, hot springs, seeps, stream banks, shores, dune swales. +
stipitate-glandular +
short to long +
axillary +  and terminal +
spiral +, whorled +, alternate +  and opposite +
purple +  and more or less gray +
deciduous +
basal +  and cauline +
linear-lanceolate;lanceolate +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
not fleshy +
3 +, 2 +  and 4 +
triangular +  and linear +
subequal +
tenuinucellate +  and unitegmic +
campylotropous-like +
Flowering Apr–Oct(–Nov). +
20 +  and 100 +
trapezoidal +, oblong-ovoid +, pyramidal +  and ovoid +
Illustrated +  and Endemic +
non-secund +  and secund +
elongate +
subequal +
branched +  and unbranched +
sprawling +  and prostrate +
aerial +  and subterranean +
not fleshy +
2-lobed +  and entire +
Euchroma +  and Oncorhynchus +
Castilleja minor var. exilis +
Castilleja minor +
variety +
red-purple +, red +, yellow +, white +  and green +
shallow;deep +
spreading +  and strongly incurved +
reduced +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
1.6 cm16 mm <br />0.016 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +