The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Thompson's Indian paintbrush, Thompson's owl clover, Thompson's paintbrush

magenta paintbrush, mountain Indian paintbrush, mountain or rosy or small-flower paintbrush, small-flower paintbrush

Habit Herbs, perennial, 0.8–4 dm; from a woody caudex; with a taproot. Herbs, perennial, (0.6–)1–4(–5) dm; from a woody caudex; with a taproot or stout, branched roots.
Stems

few to many, erect or ascending, unbranched or branched, hairs spreading, long, stiff, sometimes soft (especially in higher elevations), eglandular, mixed with shorter stipitate-glandular ones.

several or many, erect or ascending, unbranched except for short, leafy axillary shoots, glabrate proximally, hairy distally, hairs sparse, spreading, ± matted, long, soft, minute-glandular.

Leaves

green to purple or reddish brown, linear to narrowly oblong or linear-lanceolate, 1.4–7.4 cm, not fleshy, margins plane to ± wavy, involute or flat, 3(–7)-lobed, apex acuminate;

lobes spreading-ascending, linear, short to long moving up leaf axis, apex acute or obtuse.

green or gray-green to purple-tinged or deep purple, often blackening on drying, narrowly to broadly lanceolate or elliptic, rarely linear, 1.5–5 cm, not fleshy, margins plane, sometimes ± wavy, flat, (0–)3–9-lobed, apex acute to acuminate or obtuse;

lobes spreading or ascending, linear, sometimes lanceolate, much narrower than terminal lobe, evenly spaced, short, apex acute.

Inflorescences

2.5–14 × 1–4 cm;

bracts greenish to pale yellow or reddish brown throughout, or proximally greenish to dull reddish purple, or ruddy brown, distally greenish to yellow-green or yellow, often aging dull reddish to dull purplish, lanceolate to oblong to ovate, 3–5(–9)-lobed;

lobes spreading to ascending, linear to narrowly lanceolate, long, proximal lobes arising below mid length, apex acute to obtuse.

2–16 × 1–3.5 cm;

bracts proximally greenish, dull, deep purple, or reddish purple, distally pink, pink-purple, magenta, deep rose, crimson, cream, or white, sometimes red, pale orange, or red-orange, lanceolate to broadly elliptic or ovate, 3–7-lobed;

lobes spreading to ascending, linear, lanceolate, or lanceolate-acuminate, short to medium length, arising at or near mid length, apex obtuse to acute, central lobes sometimes rounded.

Corollas

straight, 18–21 mm;

tube 11–16 mm; subequal to calyx, sometimes beak exserted;

beak adaxially green, 5–7(–8) mm;

abaxial lip white, often proximally reddish, prominent, scarcely expanded, ± cylindric, 2.5–4(–5) mm, 50–70% as long as beak, glabrous or obscurely puberulent;

teeth incurved to erect, white, 2.5 mm.

straight or slightly curved, 12–30 mm;

tube 8–19 mm;

beak exserted or subequal to calyx, adaxially green-yellowish or red, 5.5–11 mm;

abaxial lip green, brown, or yellow, sometimes purple, reduced, slightly or not inflated and pouched, 1–3 mm, 20–45% as long as beak;

teeth erect, green, white, yellow, pink, or red, 0.5–2 mm.

Calyces

colored as bracts, 12–25 mm;

abaxial and adaxial clefts 4–8 mm, 20–60% of calyx length, deeper than laterals, lateral (0–)1–3 mm, 7–25% of calyx length;

lobes linear, lanceolate, or triangular, apex acute, sometimes obtuse.

colored as bracts, 12–28 mm;

abaxial and adaxial clefts 6–15 mm, 40–70% of calyx length, deeper than laterals, lateral 1–8 mm, 10–35% of calyx length;

lobes narrowly to broadly triangular, sometimes distally expanded and flaring, petaloid, apex obtuse or acute, sometimes rounded.

2n

= 24, 48.

= 24, 48.

Castilleja thompsonii

Castilleja parviflora

Phenology Flowering Apr–Aug(–Sep).
Habitat Dry slopes, ridges, scabland lithosol soils, meadows, sagebrush steppes, valleys, montane to alpine.
Elevation 200–2100 m. (700–6900 ft.)
Distribution
from FNA
OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; OR; WA; AB; BC; YT
[WildflowerSearch map]
[BONAP county map]
Discussion

Castilleja thompsonii is a characteristic species of the sagebrush communities on the eastern slope of the Cascade Range in Washington, and in the high deserts of the Columbia Basin. Historically, its range approached but apparently never entered Idaho in the Spokane River valley, but much of its habitat in that area is now converted to agriculture or suburban development or overwhelmed by non-native, invasive plants. Castilleja thompsonii occurs in a few sites in the Okanogan Valley region of southern British Columbia and at one site on the eastern slopes of the Cascade Range in Wasco County, Oregon. A distinctive form from the subalpine and alpine zones of Mt. Adams, in the southern Cascade Range of Washington, was named C. villicaulis. This form may merit varietal status under C. thompsonii. While both names were described in the same paper, C. thompsonii is the name used in all regional floras since their publication, after C. villicaulis was reduced to synonymy by M. Ownbey (1959).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Varieties 4 (4 in the flora).

Castilleja parviflora is a complex, geographically widespread, and often misunderstood species ranging from southeastern Alaska through much of British Columbia, southwestern Yukon, and the Rocky Mountains of extreme western Alberta and southward in the Cascade Range to central Oregon.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Corollas (18–)20–30 mm; calyces 20–28 mm; leaves (0–)3(–5)-lobed; Oregon, Washington.
var. oreopola
1. Corollas 12–20(–25) mm; calyces 12–20(–28) mm; leaves (0–)3–9-lobed; Washington to Alaska, Alberta, and Yukon.
→ 2
2. Bracts distally white to cream, sometimes suffused with pink to purple; herbs 0.6–2.7 dm; n Cascade Range, Washington and s British Columbia.
var. albida
2. Bracts distally pink-purple, magenta, deep rose, or crimson, rarely white; herbs 1.2–5 dm; Olympic Mountains, Washington, w Canada, se Alaska.
→ 3
3. Leaves (3–)5–9-lobed; corolla beaks 5.5–7 mm; Alberta, British Columbia, Yukon, Alaska.
var. parviflora
3. Leaves (0–)3(–5)-lobed; corolla beaks (5.5–)7–9(–11) mm; s Vancouver Island, British Columbia, Olympic Mountains, Washington.
var. olympica
Source FNA vol. 17, p. 661. FNA vol. 17, p. 640.
Parent taxa Orobanchaceae > Castilleja Orobanchaceae > Castilleja
Sibling taxa
C. affinis, C. ambigua, C. angustifolia, C. applegatei, C. aquariensis, C. arachnoidea, C. attenuata, C. brevilobata, C. brevistyla, C. campestris, C. cervina, C. chambersii, C. chlorotica, C. christii, C. chromosa, C. chrymactis, C. chrysantha, C. cinerea, C. citrina, C. coccinea, C. collegiorum, C. covilleana, C. crista-galli, C. cryptantha, C. cusickii, C. densiflora, C. dissitiflora, C. disticha, C. elata, C. elegans, C. elmeri, C. exserta, C. flava, C. foliolosa, C. fraterna, C. genevieveana, C. glandulifera, C. gleasoni, C. gracillima, C. grisea, C. haydenii, C. hispida, C. hololeuca, C. hyperborea, C. indivisa, C. integra, C. kaibabensis, C. kerryana, C. kraliana, C. lacera, C. lanata, C. lasiorhyncha, C. lassenensis, C. latifolia, C. lemmonii, C. leschkeana, C. levisecta, C. linariifolia, C. lindheimeri, C. lineariloba, C. lineata, C. litoralis, C. lutescens, C. martini, C. mendocinensis, C. mexicana, C. miniata, C. minor, C. mogollonica, C. mollis, C. montigena, C. nana, C. nelsonii, C. nervata, C. nivea, C. occidentalis, C. oresbia, C. organorum, C. ornata, C. pallescens, C. pallida, C. parviflora, C. parvula, C. patriotica, C. peckiana, C. peirsonii, C. pilosa, C. plagiotoma, C. praeterita, C. pruinosa, C. puberula, C. pulchella, C. purpurascens, C. purpurea, C. raupii, C. revealii, C. rhexiifolia, C. rigida, C. rubicundula, C. rubida, C. rupicola, C. salsuginosa, C. scabrida, C. schizotricha, C. septentrionalis, C. sessiliflora, C. subinclusa, C. suksdorfii, C. tenuiflora, C. tenuis, C. tomentosa, C. uliginosa, C. unalaschcensis, C. victoriae, C. viscidula, C. wightii, C. wootonii, C. xanthotricha
C. affinis, C. ambigua, C. angustifolia, C. applegatei, C. aquariensis, C. arachnoidea, C. attenuata, C. brevilobata, C. brevistyla, C. campestris, C. cervina, C. chambersii, C. chlorotica, C. christii, C. chromosa, C. chrymactis, C. chrysantha, C. cinerea, C. citrina, C. coccinea, C. collegiorum, C. covilleana, C. crista-galli, C. cryptantha, C. cusickii, C. densiflora, C. dissitiflora, C. disticha, C. elata, C. elegans, C. elmeri, C. exserta, C. flava, C. foliolosa, C. fraterna, C. genevieveana, C. glandulifera, C. gleasoni, C. gracillima, C. grisea, C. haydenii, C. hispida, C. hololeuca, C. hyperborea, C. indivisa, C. integra, C. kaibabensis, C. kerryana, C. kraliana, C. lacera, C. lanata, C. lasiorhyncha, C. lassenensis, C. latifolia, C. lemmonii, C. leschkeana, C. levisecta, C. linariifolia, C. lindheimeri, C. lineariloba, C. lineata, C. litoralis, C. lutescens, C. martini, C. mendocinensis, C. mexicana, C. miniata, C. minor, C. mogollonica, C. mollis, C. montigena, C. nana, C. nelsonii, C. nervata, C. nivea, C. occidentalis, C. oresbia, C. organorum, C. ornata, C. pallescens, C. pallida, C. parvula, C. patriotica, C. peckiana, C. peirsonii, C. pilosa, C. plagiotoma, C. praeterita, C. pruinosa, C. puberula, C. pulchella, C. purpurascens, C. purpurea, C. raupii, C. revealii, C. rhexiifolia, C. rigida, C. rubicundula, C. rubida, C. rupicola, C. salsuginosa, C. scabrida, C. schizotricha, C. septentrionalis, C. sessiliflora, C. subinclusa, C. suksdorfii, C. tenuiflora, C. tenuis, C. thompsonii, C. tomentosa, C. uliginosa, C. unalaschcensis, C. victoriae, C. viscidula, C. wightii, C. wootonii, C. xanthotricha
Subordinate taxa
C. parviflora var. albida, C. parviflora var. olympica, C. parviflora var. oreopola, C. parviflora var. parviflora
Synonyms C. villicaulis
Name authority Pennell: Proc. Acad. Nat. Sci. Philadelphia 99: 178. (1947) — (as thompsoni) Bongard: Mém. Acad. Imp. Sci. St.-Pétersbourg, sér. 6, Sci. Math. 2(2): 158. (1832)
Web links