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attenuate Indian paintbrush, attenuate paintbrush, narrow-leaf owl's-clover, narrow-leaf owl-clover, narrow-leaf paintbrush, valley-tassels

Labrador Indian paintbrush, northeastern paintbrush, northern or sulfur or yellow paintbrush, northern paintbrush, northern painted-cup, sulphur Indian paintbrush, sulphur paintbrush

Habit Herbs, annual, 1–4.5 dm; with fibrous roots. Herbs, perennial, (1.5–)2.5–5.5(–7) dm; from a woody caudex; with a taproot or system of slender to stout, branched roots.
Stems

solitary, erect to ascending, unbranched, sometimes branched from base, hairs spreading, short and medium, ± stiff, eglandular.

few to several, erect to ascending or ± decumbent at base, unbranched or branched, sometimes with short, leafy axillary shoots, glabrous or glabrate proximally, sometimes hairy, hairs spreading to retrorsely curved, short, ± stiff throughout, spreading, longer, soft to ± stiff distally, often glandular and short-glandular.

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.

green to purplish, linear-lanceolate or narrowly to broadly lanceolate, 2–7(–8) cm, not fleshy, margins plane, flat to involute, prominently veined, 0(–3)-lobed, apex acute to acuminate;

lobes ascending, linear to narrowly lanceolate, short, apex acute or obtuse.

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.

2.1–11 × 1.5–4 cm;

bracts proximally greenish to pale yellow-green, sometimes brownish purple, distally white to cream or light yellow, sometimes light pink or buff, sometimes aging pink or reddish, broadly lanceolate to oblong or obovate, sometimes lanceolate, 0–3(–5)-lobed, sometimes with irregular teeth at apex;

lobes erect, triangular, short, arising at or above mid length, center lobe apex obtuse to rounded, sometimes acute, lateral ones acute.

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.

± straight, (16–)18–30 mm;

tube 10–20 mm;

teeth of abaxial lip rarely exserted, beak exserted;

beak adaxially green or yellowish, 6–12 mm;

abaxial lip green or whitish, reduced, slightly inflated, 1.5–3 mm, 25–30% as long as beak;

teeth incurved to erect, green or white, 0.5–2 mm.

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.

colored as bracts, 13–23(–28) mm;

abaxial clefts (6–)8–13 mm, adaxial (5–)6–10(–11) mm, clefts (25–)35–50% of calyx length, deeper than laterals, lateral 1–4 mm, 5–25% of calyx length;

lobes triangular to lanceolate, abaxial and adaxial segments often differing in length or width, apex obtuse to acute.

Filaments

glabrous.

2n

= 24.

= 24, 48, 96.

Castilleja attenuata

Castilleja septentrionalis

Phenology Flowering (Feb–)Mar–Jun. Flowering (Apr–)May–Sep.
Habitat Grasslands, pastures, moist margins of springs and streams, damp rocky slopes. Moist meadows, peatlands, open forests, gravel, rocky slopes, ridges, slides, lowlands to subalpine.
Elevation 0–2100 m. (0–6900 ft.) 0–3700 m. (0–12100 ft.)
Distribution
from FNA
AZ; CA; OR; WA; BC; Mexico (Baja California); South America (Chile)
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; ID; ME; MI; MN; MT; NH; NM; SD; UT; VT; WY; AB; BC; NB; NL; NT; NU; ON; QC
[WildflowerSearch map]
[BONAP county map]
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.

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

Castilleja septentrionalis is one of the most widespread species in the flora area. It occurs throughout much of the Rocky Mountain region, from New Mexico northward into southern Canada and sporadically eastward to the Atlantic coast, as well as in the higher mountains and notches of New England. Rocky Mountain plants are commonly called C. sulphurea, but there is broad morphological overlap between these plants and those in New England and eastern Canada, where C. septentrionalis was first described, and they are here considered synonymous. Varietal segregates may eventually prove to be appropriate, especially in the Canadian Rocky Mountains and in southeastern Canada and the adjacent United States, but this should await a comprehensive and detailed review across the full range of the species.

The relationship of Castilleja septentrionalis with the largely alpine species, C. occidentalis, has been the subject of much discussion, but the two have discrete ranges and usually remain reasonably easy to separate. The same cannot be said for plants from the Canadian Rocky Mountains, where some specimens in relatively low-elevation, riverine flood plains and lake basins seem transitional to the boreal-arctic C. pallida.

Castilleja septentrionalis occasionally forms localized hybrid swarms with its close relatives, C. miniata and C. rhexiifolia, where the morphological boundaries between the species seem to disintegrate. However, most populations of all three species are distinct and easily recognizable, and each has a different range, despite extensive sympatry. A possible hybrid with C. linariifolia bears the name C. ×cognata Greene, and a probable hybrid with C. miniata from southern Nevada is known as C. ×porterae Cockerell.

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

Source FNA vol. 17, p. 590. FNA vol. 17, p. 656.
Parent taxa Orobanchaceae > Castilleja Orobanchaceae > Castilleja
Sibling taxa
C. affinis, C. ambigua, C. angustifolia, C. applegatei, C. aquariensis, C. arachnoidea, 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. thompsonii, 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. 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. 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
Synonyms Orthocarpus attenuatus C. pallida subsp. septentrionalis, C. rhexiifolia var. sulphurea, C. sulphurea
Name authority (A. Gray) T. I. Chuang & Heckard: Syst. Bot. 16: 656. (1991) Lindley: Bot. Reg. 11: plate 925. (1825)
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