Castilleja sessiliflora

Pursh

Fl. Amer. Sept. 2: 738. 1813.

Illustrated
Treatment appears in FNA Volume 17. Treatment on page 657. Mentioned on page 565, 573, 577, 579, 587, 598, 618, 627, 656.

Herbs, perennial, 1–4 dm; from a branching, woody caudex; with a taproot. Stems few-to-many, ascending to erect, often decumbent at base, unbranched, sometimes branched, hairs spreading, sometimes matted, short to medium length, ± soft, eglandular, often with a layer of minute-glandular hairs, sometimes woolly. Leaves green to purple, or grayish with dust and hairs, linear to narrowly lanceolate, (1–) 2–5 (–6) cm, not fleshy, margins plane, involute, (0–) 3–5-lobed, apex acuminate to acute; lobes divergent, spreading, linear, apex acute. Inflorescences 3–18 × 2.5–6.5 cm; bracts green to purplish throughout, sometimes reddish-brown, pink, or lavender throughout, or distally white or pale-yellow, sometimes distally dull pink, pink, salmon, orangish, pale pink-orange, buff, or cream, lanceolate, similar to distal leaves, 3 (–5) -lobed; lobes spreading, linear-lanceolate, long, arising at or below mid length, apex acute to acuminate, sometimes obtuse. Calyces colored as bracts, sometimes proximally white, 20–40 mm; abaxial and adaxial clefts 12–20 mm, 40–60% of calyx length, deeper than laterals, lateral 5–15 mm, 10–25% of calyx length; lobes linear, apex acute to acuminate. Corollas strongly curved distally, 35–55 mm; tube 24–45 mm; abaxial lip, beak, and distal portion of tube exserted; beak adaxially green, yellow, pinkish, purplish, or whitish, 9–15 mm; abaxial lip green, pale green, or purple, protruding, shelflike, 4–8 mm, 50–70% as long as beak; teeth spreading, white, pale-yellow, pink, or purple, 3–4 mm. 2n = 24.


Phenology: Flowering (Feb–)Mar–Aug(–Oct).
Habitat: Dry mixed grass and shortgrass prairies, prairie sandhills, sandsage plains, sand prairies, rocky or sandy slopes, bluffs, open forests, or desert scrub, limestone, sandstone, gypsum, granite, other bedrock types.
Elevation: 0–2300 m.

Distribution

Alta., Man., Sask., Ariz., Colo., Ill., Iowa, Kans., Minn., Mo., Mont., Nebr., N.Mex., N.Dak., Okla., S.Dak., Tex., Wis., Wyo., Mexico (Coahuila), Mexico (Nuevo León), Mexico (Tamaulipas)

Discussion

Castilleja sessiliflora ranges across the Great Plains from southern Canada to northern Mexico, where it is apparently rare. In Texas and northern Mexico, its range overlaps with the similar C. mexicana. Most populations of C. sessiliflora, especially north of Texas, have white to pale yellow inflorescences; in southwestern Texas they are more variable in color, with pink-purple plants often predominating locally. Those plants with pink-purple inflorescences were named forma purpurina by F. W. Pennell. In the limestone deserts of southern New Mexico and southeastern Arizona, the inflorescences are often a pale pink-orange, but these are intermingled with more typical greenish white plants. Occasional hybrids between C. angustifolia var. dubia and C. sessiliflora are known from northeastern Wyoming.

Selected References

None.

Lower Taxa

None.

... more about "Castilleja sessiliflora"
purple +, pale green +  and green +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Acute (?) +  and Acuminate (?) +
J. Mark Egger +, Peter F. Zika +, Barbara L. Wilson +, Richard E. Brainerd +  and Nick Otting +
Whitish (?) +, Purplish (?) +, Pinkish (?) +, Yellow (?) +  and Green (?) +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not +, leathery +  and fleshy +
cream;buff;cream;buff;pale pink-orange;orangish;salmon;pink;pink;dull;pale-yellow;white;lavender;pink;lavender;pink;reddish-brown;green;purplish +
3(-5)-lobed +  and lanceolate +
lateral +  and deeper +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
white +  and colored +
2-lobed +, lobed +  and tubular +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
taprooted;fibrous-rooted or rhizomatous +
fleshy +  and woody +
purple +, pink +, red +, orange +, yellow +, white +, green +  and pale greenish +
3.5 cm35 mm <br />0.035 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
Alta. +, Man. +, Sask. +, Ariz. +, Colo. +, Ill. +, Iowa +, Kans. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.Mex. +, N.Dak. +, Okla. +, S.Dak. +, Tex. +, Wis. +, Wyo. +, Mexico (Coahuila) +, Mexico (Nuevo León) +  and Mexico (Tamaulipas) +
0–2300 m. +
spreading-hairy +  and glabrous +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Dry mixed grass and shortgrass prairies, prairie sandhills, sandsage plains, sand prairies, rocky or sandy slopes, bluffs, open forests, or desert scrub, limestone, sandstone, gypsum, granite, other bedrock types. +
short to medium +
axillary +  and terminal +
spiral +, whorled +, alternate +  and opposite +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
green +  and purple or grayish +
deciduous +
basal +  and cauline +
linear;narrowly lanceolate +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
not fleshy +
arising +  and spreading +
3 +, 2 +  and 4 +
obtuse +  and linear-lanceolate +
subequal +
(0-)3-5-lobed +  and plane +
acute;acuminate +
tenuinucellate +  and unitegmic +
campylotropous-like +
Flowering (Feb–)Mar–Aug(–Oct). +
Fl. Amer. Sept. +
20 +  and 100 +
trapezoidal +, oblong-ovoid +, pyramidal +  and ovoid +
Illustrated +
non-secund +  and secund +
elongate +
subequal +
branched +  and unbranched +
aerial +  and subterranean +
ascending +  and erect +
not fleshy +
2-lobed +  and entire +
Euchroma +  and Oncorhynchus +
Castilleja sessiliflora +
Castilleja +
species +
purple +, pink +, pale-yellow +  and white +
shallow;deep +
reduced +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
2.4 cm24 mm <br />0.024 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +