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Peirson's paintbrush

downy Indian paintbrush, prairie paintbrush, purplish paintbrush

Habit Herbs, perennial, 0.6–3(–4) dm; from a woody caudex; with a taproot. Herbs, perennial, 1.5–3(–4) dm; from a woody caudex; with a taproot.
Stems

few to several, erect or ascending, unbranched, sometimes branched, hairs dense distally, less so proximally, spreading, long, soft, eglandular, also mixed with short stipitate-glandular ones distally.

few to many, erect to ascending, branched, sometimes unbranched, hairs fairly dense, spreading to appressed, white, fairly short, soft, ± felty, eglandular, sometimes mixed sparsely with short stipitate-glandular ones, sometimes obscuring surface.

Leaves

green to purple, narrowly to broadly lanceolate to oblong, (0.7–)1.5–4.2(–5) cm, not fleshy, margins plane, flat or involute, (0–)3(–5)-lobed, apex acuminate;

lobes ascending-spreading, narrowly lanceolate to linear, apex acute.

green to purple, linear to narrowly oblong-lanceolate, 2–7(–9) cm, not fleshy, margins plane, sometimes slightly wavy, involute, 3–7-lobed, apex narrowly acute to rounded;

lobes spreading, linear, apex obtuse or acute.

Inflorescences

2.5–7.5(–15) × 1.5–3 cm;

bracts proximally greenish to dull reddish, distally bright red, orange, or pale orange, sometimes yellowish or dull red, broadly lanceolate to oblong, 3–5-lobed;

lobes ascending, linear to lanceolate, ± long, arising above mid length, sometimes below mid length on proximal bracts, central lobe apex acute, rarely narrowly obtuse, lateral ones acute.

2.6–16 × 2–4 cm;

bracts proximally greenish to deep greenish purple, distally purple, magenta, reddish, pink, or rose, rarely white, cream, light yellow, or dull orangish, proximal linear to lanceolate, distal oblong, 3–7(–9)-lobed;

lobes spreading to ascending, linear to oblanceolate, long, arising from distal 2/3, center lobe apex obtuse to rounded, lateral ones acute to rounded.

Corollas

slightly curved, 15–28 mm;

tube 13–15 mm;

beak exserted, adaxially yellow or yellow-green, 7–8 mm;

abaxial lip yellow or deep green, reduced, slightly inflated, pouched, protruding out abaxial cleft, 1–2.5 mm, 13–33% as long as beak;

teeth erect or curved, yellow or green, 0.7–1 mm.

slightly curved, 25–40 mm;

tube 16–22 mm;

beak exserted, adaxially green, 9–18 mm;

abaxial lip green to purple-red, reduced, not strongly pouched, ± protruding, 4–5 mm, 33–50% as long as beak;

teeth prominent, petaloid, spreading to erect, colored as in distal portion of bracts, 3–4 mm.

Calyces

proximally light green or yellow, distally yellow or colored as bracts, 12–20 mm;

abaxial and adaxial clefts 5–9 mm, 40–50% of calyx length, deeper than laterals, lateral (1.5–)3–5.8 mm, 10–30% of calyx length;

lobes oblong, apex acute to obtuse.

colored as bracts, (20–)25–34 mm;

abaxial and adaxial clefts (10–)13–22 mm, 50–60% of calyx length, deeper than laterals, lateral 7–16 mm, 35–45% of calyx length;

lobes broadly linear to long-triangular or oblong, apex acute to obtuse.

2n

= 24.

Castilleja peirsonii

Castilleja purpurea

Phenology Flowering Jun–Sep. Flowering Mar–May.
Habitat Moist to wet meadows, stream banks, lakeshores, montane to alpine. Rocky slopes, ledges, prairies, woodlands, thickets, roadsides, often sandy or limy soils.
Elevation 1700–3400 m. (5600–11200 ft.) 200–600 m. (700–2000 ft.)
Distribution
from FNA
CA; NV
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[BONAP county map]
from FNA
KS; MO; OK; TX
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[BONAP county map]
Discussion

Castilleja peirsonii is endemic to the higher elevations in the Sierra Nevada of California and in Tahoe Meadows in adjacent Washoe County, Nevada. Plants with yellow bracts in the southern portion of the range were named C. carterae. Castilleja peirsonii has shorter, wider corolla beaks than the related C. parviflora. In addition to the corolla shape differences, C. peirsonii also has red to yellow bracts and fairly bright yellow corollas, especially on the beaks, while C. parviflora has purple, pink, or white bracts and greenish corolla tubes and dorsal beak surfaces, with the beak margins pink, purple, or white. Reports from outside the Sierra Nevada in California and immediately adjacent Nevada are misidentifications. Castilleja peirsonii sometimes hybridizes with C. lemmonii in meadows where both species often occur in large numbers.

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

Castilleja purpurea is a common species of eastern Oklahoma and central Texas, with a few records from adjacent southeastern Kansas and southwestern Missouri. It often provides beautiful, multicolored displays in the meadows within its range. Castilleja citrina and C. lindheimeri are closely related species sometimes regarded as varieties of C. purpurea. Hybrids and hybrid swarms between C. indivisa and C. purpurea have been observed at some localities where they are sympatric.

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

Source FNA vol. 17, p. 644. FNA vol. 17, p. 649.
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. 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. 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
Synonyms C. carterae Euchroma purpurea, C. williamsii
Name authority Eastwood: Leafl. W. Bot. 1: 175. (1935) — (as peirsoni) (Nuttall) G. Don: Gen. Hist. 4: 615. 1837/1838
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