Castilleja angustifolia var. dubia

A. Nelson

Bull. Torrey Bot. Club 29: 404. 1902.

Endemic
Synonyms: Castilleja dubia (A. Nelson) A. Nelson
Treatment appears in FNA Volume 17. Treatment on page 587. Mentioned on page 586, 595, 657.

Stems: hairs fairly dense, spreading, short and long, soft to stiff, eglandular. Bracts distally yellow to pale orange or white, sometimes red, 3–9-lobed, sometimes with secondary lobes. Calyces 18–22 mm; abaxial clefts 5–7 mm, adaxial 7–8 mm. Corollas 18–27 mm.


Phenology: Flowering Jun.
Habitat: Dry sagebrush slopes and flats in mountains, high plains.
Elevation: 1500–2400 m.

Discussion

Variety dubia is often confused with Castilleja chromosa in herbaria, floras, and databases, but they are not synonymous. Where C. angustifolia and C. chromosa are sympatric in Wyoming, the specimens show little evidence of hybridization. Variety dubia, found primarily in southwestern South Dakota and east-central Wyoming, can be recognized by its usually narrower, yellow to pale orange inflorescences, as well as by its shorter corollas, while C. chromosa has wider, red inflorescences and longer corollas. Occasional hybrids between var. dubia and C. sessiliflora are known from northeastern Wyoming.

Selected References

None.

Lower Taxa

None.

"acute" is not a number.

0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Acute (?) +  and Rounded (?) +
J. Mark Egger +, Peter F. Zika +, Barbara L. Wilson +, Richard E. Brainerd +  and Nick Otting +
A. Nelson +
Euchroma angustifolia +
Pink (?) +  and Green (?) +
long-exserted +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not +, leathery +  and fleshy +
red;distally yellow;pale orange or white +
3-9-lobed +
purple +, brown +, yellow +  and green +
2-lobed +, lobed +  and tubular +
1.8 cm18 mm <br />0.018 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
taprooted;fibrous-rooted or rhizomatous +
fleshy +  and woody +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
2.7 cm27 mm <br />0.027 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
purple +, pink +, red +, orange +, yellow +, white +, green +  and pale greenish +
1.8 cm18 mm <br />0.018 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
S.Dak. +  and Wyo. +
1500–2400 m. +
spreading-hairy +  and glabrous +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Dry sagebrush slopes and flats in mountains, high plains. +
stipitate-glandular +
axillary +  and terminal +
spiral +, whorled +, alternate +  and opposite +
7 cm70 mm <br />0.07 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
green +, purplish +  and brown +
deciduous +
basal +  and cauline +
linear;lanceolate or broadly lanceolate +
1.2 cm12 mm <br />0.012 m <br /> (7 cm70 mm <br />0.07 m <br />) +
not fleshy +
2.5 cm25 mm <br />0.025 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
ascending +  and spreading +
3 +, 2 +  and 4 +
lanceolate +  and oblong +
subequal +
(0-)3-5-lobed +, flat +, involute +, wavy +  and plane +
tenuinucellate +  and unitegmic +
campylotropous-like +
Flowering Jun. +
Bull. Torrey Bot. Club +
20 +  and 100 +
trapezoidal +, oblong-ovoid +, pyramidal +  and ovoid +
non-secund +  and secund +
elongate +
subequal +
unbranched +  and branched +
sprawling +  and prostrate +
aerial +  and subterranean +
ascending +  and erect +
not fleshy +
2-lobed +  and entire +
Castilleja dubia +
Castilleja angustifolia var. dubia +
Castilleja angustifolia +
variety +
incurved +  and ascending +
reduced +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +