Castilleja gleasoni

Elmer

Bot. Gaz. 39: 51. 1905.

Common names: Mt. Gleason paintbrush
EndemicConservation concern
Synonyms: Castilleja pruinosa subsp. gleasoni (Elmer) Munz
Treatment appears in FNA Volume 17. Treatment on page 610. Mentioned on page 572, 611, 647, 648.

Herbs or subshrubs, perennial, 3–8 dm; from a woody caudex; with a taproot. Stems several to many, erect to ascending, branched, sometimes unbranched, hairs moderately dense, spreading, ± matted, ash gray, branched, sometimes unbranched, medium length, soft, often mixed with shorter, unbranched, stipitate-glandular ones, not obscuring surface. Leaves ash gray, linear-lanceolate to narrowly oblong or narrowly oblanceolate, 2–6 cm, not fleshy, margins wavy, involute, 0 (–3) -lobed, apex acute to obtuse; lobes spreading, narrowly lanceolate, apex acute to obtuse. Inflorescences 10–15 (–30) cm; bracts proximally greenish to dull brownish purple, distally red to deep red or red-orange, lanceolate to oblong or narrowly ovate, (0–) 3 (–5) -lobed; lobes ascending to spreading, narrowly oblong to narrowly lanceolate, medium length, arising below mid length, center lobe apex obtuse or toothed, lateral ones acute. Calyces proximally pale to green, sometimes dull purple, often paler or greener than bracts, distal 1/4 or less colored as bract lobes, 12–17 mm; abaxial and adaxial clefts 3–8 mm, 40% of calyx length, deeper than laterals, lateral 0.5–3 mm, 20–25% of calyx length; lobes ovate to narrowly triangular, apex obtuse to acute. Corollas ± straight, 18–30 mm; tube 9–15 mm; beak exserted, adaxially yellow, 9–15 (–20) mm; abaxial lip spreading, deep green to ± black, reduced, 0.5–2 mm, 20% as long as beak; teeth incurved, green, 0.2–1 mm. 2n = 72.


Phenology: Flowering May–Jun.
Habitat: Ledges, rocky slopes, open yellow pine forests, montane chaparral or sagebrush.
Elevation: 900–2200 m.

Discussion

Castilleja gleasoni is an uncommon plant endemic to the upper elevations of the San Gabriel Mountains of Los Angeles County. It was treated as a polyploid derivative of C. affinis var. affinis (as subsp. affinis) × C. foliolosa (T. I. Chuang and L. R. Heckard 1993b), a hypothetical ancestry supported by a chromosome number of 2n = 72. Others have placed it as a subspecies of C. pruinosa, a similar species. However, the morphology of C. gleasoni also suggests it could have originated as a cross between the diploid C. foliolosa and a tetraploid form of C. martini; careful morphological and molecular analyses are needed to determine its true ancestry.

Castilleja gleasoni is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.

"medium" is not a number.

... more about "Castilleja gleasoni"
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
green +  and more or less black +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Obtuse (?) +  and Acute (?) +
J. Mark Egger +, Peter F. Zika +, Barbara L. Wilson +, Richard E. Brainerd +  and Nick Otting +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not +, leathery +  and fleshy +
proximally greenish;dull brownish purple distally red +
(0-)3(-5)-lobed +, lanceolate +  and oblong or narrowly ovate +
colored +, paler or greener +, proximally pale +  and green +
2-lobed +, lobed +  and tubular +
1.2 cm12 mm <br />0.012 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
taprooted;fibrous-rooted or rhizomatous +
fleshy +  and woody +
Mt. Gleason paintbrush +
purple +, pink +, red +, orange +, yellow +, white +, green +  and pale greenish +
1.8 cm18 mm <br />0.018 m <br /> (3 cm30 mm <br />0.03 m <br />) +
900–2200 m. +
spreading-hairy +  and glabrous +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Ledges, rocky slopes, open yellow pine forests, montane chaparral or sagebrush. +
unbranched +  and branched +
stipitate-glandular +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
axillary +  and terminal +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
spiral +, whorled +, alternate +  and opposite +
deciduous +
basal +  and cauline +
linear-lanceolate;narrowly oblong or narrowly oblanceolate +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
not fleshy +
arising +, ascending +  and spreading +
3 +, 2 +  and 4 +
ovate +  and narrowly triangular +
subequal +
0(-3)-lobed +  and wavy +
tenuinucellate +  and unitegmic +
campylotropous-like +
Flowering May–Jun. +
20 +  and 100 +
trapezoidal +, oblong-ovoid +, pyramidal +  and ovoid +
Endemic +  and Conservation concern +
non-secund +  and secund +
elongate +
subequal +
unbranched +  and branched +
sprawling +  and prostrate +
aerial +  and subterranean +
erect +  and ascending +
several;many +
not fleshy +
2-lobed +  and entire +
Castilleja pruinosa subsp. gleasoni +
Castilleja gleasoni +
Castilleja +
species +
shallow;deep +
reduced +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
subshrub +  and herb +