Castilleja oresbia |
Castilleja chambersii |
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pale paintbrush, pale Wallowa Indian paintbrush, pale Wallowa paintbrush |
Chambers' Indian paintbrush, Chambers' paintbrush |
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Habit | Herbs, perennial, 0.9–3 dm; from a woody caudex; with a stout taproot. | Herbs, perennial, 1.5–3.7 dm; from a thick, woody caudex; with a taproot. |
Stems | few to several, erect or ascending, sometimes decumbent at base, unbranched or branched, hairs usually retrorse, medium length, ± soft, eglandular, mixed with very short-glandular ones, sometimes with spreading, long, soft ones. |
solitary or few to several, ascending, sometimes short-decumbent and rooting, branched from near base, sometimes distally, glabrous or glabrate with hairs very sparse, ± appressed, very short, soft, eglandular. |
Leaves | green to purple, linear to lanceolate, 2–7 cm, not fleshy, margins plane, involute, 3–5(–7)-lobed, apex acuminate to acute; lobes spreading, linear to sometimes narrowly lanceolate, apex acute. |
green, often brown- or purple-tinged, oblong to lanceolate to narrowly ovate or ovate, (1–)2–5.8 cm, not fleshy, margins plane, ± involute, deeply 3–7(–11)-lobed, sometimes with secondary lobes, apex narrowly acute; lobes erect to ascending, lanceolate to linear-lanceolate to oblanceolate, apex acute. |
Inflorescences | 2.5–18 × 1–3.5 cm; bracts pale green to yellow-green or pale, dull reddish brown throughout, or proximally so colored but changing gradually to cream or yellowish on distal margins, narrowly to broadly lanceolate, (3–)5–7(–9)-lobed; lobes ascending, linear, long, proximal lobes arising below mid length, central lobe apex obtuse, others acute. |
3–15 × 2–4.5 cm; bracts proximally greenish, distally bright red, scarlet, or pale reddish orange, rarely orange-yellow, often fading to pale yellowish orange with age, obovate to orbicular, fan-shaped, (3–)5–9(–13)-lobed, sometimes with secondary lobes; lobes erect or ascending, lanceolate to triangular, short and medium length, usually arising at or above mid length, rarely below, apex acute. |
Corollas | straight, 21–36 mm; tube 16–20 mm; teeth of abaxial lip often exserted, beak exserted; beak adaxially green, 4.2–5.5 mm; abaxial lip green to purple, distally white, conspicuous, slightly but noticeably pouched, often visible through front cleft, 3–5 mm, 67–100% as long as beak, puberulent; teeth erect, white, 1.8–2.1 mm. |
straight, 30–45 mm; tube 14–19 mm; beak long-exserted, adaxially green or yellow-green to brownish, 18–24 mm; abaxial lip deep green, reduced, 1–3 mm, 10% as long as beak; teeth incurved, greenish to dull purplish, 0.5–1.5 mm. |
Calyces | colored as bracts, 10–25 mm; abaxial and adaxial clefts 6–7 mm, 30–60% of calyx length, deeper than laterals, lateral 5–10 mm, 40–50% of calyx length; lobes linear, apex acute. |
proximally green, sometimes purple to brown, distally colored as bracts, 20–30 mm; abaxial and adaxial clefts 7–14 mm, ca. 33% of calyx length, deeper than laterals, lateral 2–4 mm, 10–15% of calyx length; lobes triangular, barely longer than wide, apex acute or acuminate to obtuse. |
2n | = 24. |
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Castilleja oresbia |
Castilleja chambersii |
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Phenology | Flowering May–Aug. | Flowering Jun–Aug. |
Habitat | Dry slopes and plains, sagebrush meadows, grasslands, openings in conifer forests. | Turf or crevices on rocky slopes and benches over basalt, se to sw aspect, sun or partial shade. |
Elevation | 900–2200 m. (3000–7200 ft.) | 600–1000 m. (2000–3300 ft.) |
Distribution |
ID; OR
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OR; WA
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Discussion | Castilleja oresbia is endemic to eastern Oregon and adjacent Idaho. It is easily confused with both varieties of C. pallescens, which also occur in sagebrush habitats. Castilleja oresbia has longer calyx lobes and softer pubescence than C. pallescens var. pallescens, although some transitional specimens are found. Castilleja oresbia has a combination of longer calyx lobes, longer pubescence, and obscurely nerved bracts, which usually serve to separate it from C. pallescens var. inverta. All three have different, though somewhat overlapping, ranges. Castilleja oresbia occasionally hybridizes with C. peckiana in Grant County, Oregon. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Castilleja chambersii is limited to the summits of three volcanic peaks in the northern Coast Range of Clatsop County, Oregon, and at one similar area in nearby Pacific County, Washington. It is similar to C. rupicola, and the two likely share a common ancestor. Disturbance and erosion from logging and road construction represent significant threats to C. chambersii. Populations of C. chambersii often grow near and even alongside C. hispida, but hybrids are rare. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 635. | FNA vol. 17, p. 593. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Greenman: Bot. Gaz. 48: 147. (1909) | J. M. Egger & Meinke: Brittonia 51: 445, fig. 1. (1999) |
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