Castilleja attenuata

(A. Gray) T. I. Chuang & Heckard

Syst. Bot. 16: 656. 1991.

Common names: Valley tassels narrow-leaved owl’s-clover
Illustrated
Basionyms: Orthocarpus attenuatus A. Gray in War Department [U.S.] Pacif. Railr. Rep. 4(5): 121. 1857
Treatment appears in FNA Volume 17. Treatment on page 590. Mentioned on page 570, 586, 591, 592, 602, 603, 606.

Herbs, annual, 1–4.5 dm; with fibrous-roots. Stems solitary, erect to ascending, unbranched, sometimes branched from base, hairs spreading, short and medium, ± stiff, eglandular. Leaves green to purple-tinged, linear to linear-lanceolate, (1–) 2–8 cm, not fleshy, margins plane, flat, 0 (–5) -lobed, apex acuminate; lobes spreading to ascending, filiform to lanceolate, apex sometimes acuminate. Inflorescences (1.5–) 2–10 (–19, –30 in fruit) × 1–2 cm; bracts proximally green to pale-brown, rarely dull reddish-brown, distally white on apices, sometimes pale-yellow or pale pink-purplish on apices, rarely greenish or dull reddish-brown throughout, lanceolate or lanceolate-elliptic, 3 (–5) -lobed; lobes ascending, linear to lanceolate, long, arising below mid length, apex acuminate, acute, or obtuse. Calyces colored as bracts, (8–) 15–23 mm; abaxial and adaxial clefts (4–) 6–8 mm, abaxial ca. 50% of calyx length, adaxial ca. 75% of calyx length, lateral 3–3.5 mm, 33% of calyx length; lobes linear to narrowly triangular, apex acute to acuminate. Corollas straight, 10–25 mm; tube 9–20 mm, not expanded distally; beak exserted, straight, adaxially white, light yellow, or greenish, 3–5 mm, inconspicuously puberulent; abaxial lip white or yellow with deep brown to purple spots, often becoming pink, slightly inflated, exserted or not, pouches 3, 2 mm wide, 1–1.5 mm deep, 3–4 mm, 75–80% as long as beak; teeth erect, white, pale-yellow, or pink, 0.5–1.2 mm. Filaments glabrous. 2n = 24.


Phenology: Flowering (Feb–)Mar–Jun.
Habitat: Grasslands, pastures, moist margins of springs and streams, damp rocky slopes.
Elevation: 0–2100 m.

Distribution

B.C., Ariz., Calif., Oreg., Wash., Mexico (Baja California), South America (Chile)

Discussion

Castilleja attenuata is a common and widespread species, ranging from southwestern Canada to northern Baja California, with several disjunct populations in central Chile. It is sensitive to competition from weeds. Disjunct populations in the Rincon Mountains in Pima County, Arizona, often have pink bracts but are otherwise typical.

Selected References

None.

Lower Taxa

None.

"acuminate" is not a number.

... more about "Castilleja attenuata"
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
yellow +  and white +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Acute (?) +  and Acuminate (?) +
J. Mark Egger +, Peter F. Zika +, Barbara L. Wilson +, Richard E. Brainerd +  and Nick Otting +
(A. Gray) T. I. Chuang & Heckard +
Orthocarpus attenuatus +
straight +
puberulent +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
not +, leathery +  and fleshy +
reddish-brown;dull;greenish;pale pink-purplish;pale-yellow;white;reddish-brown;proximally green;pale-brown +
3(-5)-lobed +, lanceolate-elliptic +  and lanceolate +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
2-lobed +, lobed +  and tubular +
1.5 cm15 mm <br />0.015 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
taprooted;fibrous-rooted or rhizomatous +
fleshy +  and woody +
Valley tassels +  and narrow-leaved owl’s-clover +
purple +, pink +, red +, orange +, yellow +, white +, green +  and pale greenish +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
B.C. +, Ariz. +, Calif. +, Oreg. +, Wash. +, Mexico (Baja California) +  and South America (Chile) +
0–2100 m. +
pink +  and brown to purple spots +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Grasslands, pastures, moist margins of springs and streams, damp rocky slopes. +
stipitate-glandular +
medium +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
axillary +  and terminal +
spiral +, whorled +, alternate +  and opposite +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
green +  and purple-tinged +
deciduous +
basal +  and cauline +
linear;linear-lanceolate +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
not fleshy +
arising +, ascending +  and spreading +
3 +, 2 +  and 4 +
linear +  and narrowly triangular +
subequal +
0(-5)-lobed +  and plane +
tenuinucellate +  and unitegmic +
campylotropous-like +
Flowering (Feb–)Mar–Jun. +
3 cm30 mm <br />0.03 m <br /> (?) +
20 +  and 100 +
trapezoidal +, oblong-ovoid +, pyramidal +  and ovoid +
Illustrated +
non-secund +  and secund +
elongate +
subequal +
branched +  and unbranched +
sprawling +  and prostrate +
aerial +  and subterranean +
erect +  and ascending +
not fleshy +
2-lobed +  and entire +
Euchroma +  and Oncorhynchus +
Castilleja attenuata +
Castilleja +
species +
pink +, pale-yellow +  and white +
shallow;deep +
reduced +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
expanded +
0.9 cm9 mm <br />0.009 m <br /> (2 cm20 mm <br />0.02 m <br />) +