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Dodecatheon dentatum

dentate shooting star, tooth American cowslip, white shooting star

padre's shootingstar

Habit Plants 15–40(–50) cm; scape glabrous. Plants (7–)10–40 cm; scape glabrous, usually glandular-puberulent apically.
Caudices

not obvious at anthesis, or sometimes erect to slightly horizontal, slender;

roots white or reddish;

bulblets absent.

not obvious at anthesis;

roots tannish;

bulblets absent.

Leaves

(3.5–)8–20(–30) × (1–)2.5–6(–7) cm;

petiole slightly winged;

blade ovate, base decurrent onto stem, abruptly tapering to petiole, margins subentire to sinuate or crenate, surfaces glabrous.

(1–)3–18(–20) × 0.5–4(–5) cm;

petiole usually slender;

blade oblanceolate to spatulate, base usually not decurrent onto stem, narrowing abruptly to petiole, margins usually entire, rarely finely denticulate, surfaces usually glabrous, sometimes with sessile glands.

Inflorescences

(1–)2–5(–11)-flowered;

bracts lanceolate, 1.5–5(–8) mm, glabrous.

(1–)5–18-flowered;

bracts usually narrowly lanceolate to lanceolate, rarely oblanceolate, 3–22 mm, usually glandular, sometimes glabrous.

Pedicels

0.8–5 cm, glabrous.

2–5 cm, sparsely to moderately glandular-puberulent.

Flowers

calyx light green, 4–6 mm, glabrous, tube 2–3.5 mm, lobes 5, 1.5–3(–4) mm;

corolla tube yellow with red, thin, wavy ring, lobes 5, white, 7–18(–20) mm;

filaments distinct, maroon to black, 0.1–0.5 mm;

anthers (4.5–)5–7.5 mm;

pollen sacs maroon to black, connective dark purple to maroon, smooth;

stigma not enlarged compared to style.

calyx light greenish, 5.5–8.5 mm, glandular-pubescent abaxially, tube 1.5–2.5 mm, lobes 5, 3–6 mm;

corolla tube yellow with dark maroon, thick, often wavy ring, lobes 5, magenta or white, 6–25(–30) mm;

filaments connate, tube yellow or dark maroon to black, 2.5–4 × 3–4 mm;

anthers 3–5 mm;

pollen sacs yellow or dark purple, connective yellow or maroon to black, transversely rugose;

stigma not enlarged compared to style.

Capsules

pale greenish to tannish, dark yellow apically, valvate, narrowly ovoid, (6–)8–11 × 3–5 mm, glabrous;

walls thin, pliable.

yellowish or reddish tan, often suffused with purple, valvate or operculate, cylindric-ovoid, 8–16 × 4–7 mm, glabrous or glandular-puberulent;

walls thin, pliable.

Seeds

without membrane along edges.

without membrane along edges.

2n

= 44.

= 44, 66, 88.

Dodecatheon dentatum

Dodecatheon clevelandii

Phenology Flowering late spring–summer.
Habitat Moist stream banks, cliff faces and steep slopes mainly in meadows and open oak and/or conifer woodlands
Elevation 60-2600 m (200-8500 ft)
Distribution
from FNA
ID; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; nw Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

Dodecatheon dentatum occurs mainly on the eastern slope of the Cascade Range from south-central British Columbia to central Washington, with disjunct populations near the Columbia River in southwestern Washington, the Columbia River Gorge, northeastern Oregon, and northern Idaho. In Idaho, this species occasionally forms hybrids with D. pulchellum var. pulchellum (Oberle 262, MO).

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

Varieties 4 (4 in the flora).

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

Key
1. Connectives yellow; filament tubes without yellow or white spot proximal to each anther.
var. clevelandii
1. Connectives maroon to black; filament tubes with or without yellow or white spot proximal to each anther
→ 2
2. Filament tubes without yellow or white spot proximal to each anther.
var. insulare
2. Filament tubes with yellow or white spot proximal to each anther
→ 3
3. Pollen sacs usually yellow.
var. gracile
3. Pollen sacs usually dark purple.
var. patulum
Source FNA vol. 8, p. 278. FNA vol. 8, p. 274.
Parent taxa Primulaceae > Dodecatheon Primulaceae > Dodecatheon
Sibling taxa
D. alpinum, D. amethystinum, D. austrofrigidum, D. clevelandii, D. conjugens, D. ellisiae, D. frenchii, D. frigidum, D. hendersonii, D. jeffreyi, D. meadia, D. poeticum, D. pulchellum, D. redolens, D. subalpinum, D. utahense
D. alpinum, D. amethystinum, D. austrofrigidum, D. conjugens, D. dentatum, D. ellisiae, D. frenchii, D. frigidum, D. hendersonii, D. jeffreyi, D. meadia, D. poeticum, D. pulchellum, D. redolens, D. subalpinum, D. utahense
Subordinate taxa
D. clevelandii var. clevelandii, D. clevelandii var. gracile, D. clevelandii var. insulare, D. clevelandii var. patulum
Synonyms D. latilobum, D. meadia var. latilobum, Primula latiloba Primula clevelandii
Name authority Hooker: Fl. Bor.-Amer. 2: 119. 1838 , Greene: Pittonia 1: 213. 1888 (as clevelandi),
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