Dodecatheon austrofrigidum |
Dodecatheon frenchii |
|
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frigid shooting star, tillamook shooting star, tundra shooting star |
French's shootingstar |
|
Habit | Plants (5–)10–45 cm; scape usually glabrous, glandular-puberulent distally. | Plants 20–40(–60) cm; scape glabrous, rarely glandular-pubescent. |
Caudices | not obvious at anthesis; roots white; bulblets absent. |
not obvious at anthesis; roots white; bulblets absent. |
Leaves | 2.5–30 × 0.7–7 cm; petiole winged; blade narrowly to broadly elliptic or ovate, base decurrent onto stem, gradually tapering to petiole, margins entire or irregularly sinuate-dentate to denticulate, surfaces glabrous. |
10–30 × 4–8(–10) cm; petiole slender (at least basally); blade (not suffused with red at base), spatulate to ovate or broadly oval, base slightly decurrent onto stem, abruptly tapering to petiole, margins usually entire, surfaces usually glabrous, rarely minutely glandular. |
Inflorescences | 1–7-flowered; bracts lanceolate, 2.5–10 mm, glandular-puberulent. |
2–15-flowered; bracts lanceolate, 3–10 mm, glabrous, rarely glandular-pubescent. |
Pedicels | (0.4–)0.5–4.5(–5.5) cm, glandular-puberulent, sometimes glabrous. |
1–5 cm, usually glabrous, rarely glandular-pubescent. |
Flowers | calyx green, 5–11 mm, glabrous or glandular (at least on margins of lobes), tube 1–2.5(–3) mm, lobes 5, 3–9 mm; corolla tube white with reddish to purplish, thin, wavy ring, lobes 5, magenta, (9–)15–20(–23) mm; filaments distinct, dark maroon to dark purple, 0.5–1.8 mm; anthers (4.5–)6–8 mm; pollen sacs maroon to dark purple, connective dark purple, smooth; stigma not enlarged compared to style. |
calyx light green, 3–8 mm, glabrous, tube 2–2.5 mm, lobes 5, 3–6 mm; corolla tube maroon and yellow with maroon, thin, wavy ring, lobes 5, white, sometimes pale rose or lavender to (rarely) magenta, 10–20 mm; filaments distinct and 0.8–1.2 mm or connate and tube yellow, 0.8–1.2 × 1.2–1.8 mm; anthers 5–7.5 mm; pollen sacs yellow, rarely speckled with red or maroon, connective purple, dark maroon, or black, smooth; stigma not enlarged compared to style. |
Capsules | greenish to tannish with purple speckles, often purplish apically, operculate or valvate, ovoid, 6–16 × 3.5–5.5(–7) mm, glabrous; walls thin, pliable. |
reddish brown, valvate, cylindric-ovoid, 6–10 × 3.5–5 mm, glabrous; walls thick, firm. |
Seeds | without membrane along edges. |
without membrane along edges. |
2n | = 88. |
= 44. |
Dodecatheon austrofrigidum |
Dodecatheon frenchii |
|
Phenology | Flowering spring. | Flowering spring. |
Habitat | Moist basaltic slopes, ridges, streamsides, and cliff faces in conifer woodlands near waterfalls and along streams or in high-elevation, tundralike, grassland communities | Moist, shaded flats under sandstone cliffs and overhanging ledges along or near streams |
Elevation | 30-1200 m (100-3900 ft) | 100-300 m (300-1000 ft) |
Distribution |
OR; WA
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AL; AR; IL; IN; KY; MO
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Discussion | Of conservation concern. Dodecatheon austrofrigidum occurs mainly in the mountains near the coast of Washington from the southern Olympic Peninsula (Grays Harbor and Pacific counties) to northwestern Oregon (Clatsop and Tillamook counties). The populations are widely scattered and always with relatively few individuals. At higher elevations (e.g., ca. 1200 m atop Saddle Mountain, Tillamook County), D. austrofrigidum occurs in moist, grassy turf. At lower elevations in the same area, it occurs on stream banks in the narrow zone between the high- and low-water mark, persisting in cracks of basaltic rocks. The degree of denticulation of the leaves appears to vary among populations; some larger plants have toothed leaf blades even prior to anthesis. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Dodecatheon frenchii is relatively rare throughout its restricted range in southern Illinois (Jackson, Johnson, Pope, Saline, Union, and Williamson counties), southern Indiana (Crawford and Perry counties), and western Kentucky (Breckinridge, Carter, Crittenden, Edmonson, Hardin, Menifee, Todd, Union, and Warren counties), with additional outlying populations in Colbert County, Alabama, Cleburne and Newton counties, Arkansas, and at Hickory Canyons Natural Area in Sainte Genevieve County, Missouri. The mature leaves nearly always have a distinctive cordate base. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 278. | FNA vol. 8, p. 285. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Primula austrofrigida | D. meadia var. frenchii, D. meadia subsp. membranaceum, Primula frenchii |
Name authority | K. L. Chambers: Sida 22: 462, figs. 1–3. 2006 , | (Vasey) Rydberg: Fl. Plains N. Amer., 626. 1932 , |
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