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Dodecatheon conjugens

Bonneville shooting star, desert shootingstar, slim-pod shooting star

frigid shooting star, tillamook shooting star, tundra shooting star

Habit Plants 5–30(–40) cm; scape usually glabrous, sometimes glandular-puberulent proximally. Plants (5–)10–45 cm; scape usually glabrous, glandular-puberulent distally.

not obvious at anthesis;

roots whitish;

bulblets absent.

not obvious at anthesis;

roots white;

bulblets absent.


3–13(–18) × 0.7–2.5(–4) cm;

petiole slender (at least proximally);

blade narrowly oblanceolate to spatulate or obovate, base usually not decurrent onto stem, usually abruptly tapering to petiole, margins entire, surfaces glabrous or glandular-puberulent.

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.



bracts lanceolate to broadly lanceolate, 3–10 mm, glandular-puberulent.


bracts lanceolate, 2.5–10 mm, glandular-puberulent.


1–5 cm, glabrous or glandular-puberulent.

(0.4–)0.5–4.5(–5.5) cm, glandular-puberulent, sometimes glabrous.


calyx light green to yellowish, sometimes finely purple-speckled or -dotted, 5–12 mm, glabrous or glandular-puberulent, tube 2–6 mm, lobes 5, 3–7 mm;

corolla tube yellowish with purplish red, thin, wavy ring, lobes 5, usually magenta, sometimes white, 7–25(–35) mm;

filaments usually distinct, yellowish or dark maroon, 0.5–1.5 mm, rarely partially connate and tube 0.5–1.5 × 1.5–5 mm;

anthers 5–9 mm;

pollen sacs usually maroon or yellow, sometimes yellowish and speckled maroon, rarely with reddish purple to purple speckles, connective usually maroon, sometimes yellowish or light blue to whitish, transversely rugose;

stigma not enlarged compared to style.

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.


tan, often striped with purple, usually operculate, rarely valvate, cylindric-ovoid, 8–17(–22) × 4–6(–8) mm, glabrous;

walls thin, pliable.

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.


without membrane along edges.

without membrane along edges.


= 44.

= 88.

Dodecatheon conjugens

Dodecatheon austrofrigidum

Phenology 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
Elevation 30-1200 m (100-3900 ft)
from FNA
[WildflowerSearch map]
[BONAP county map]
from FNA
[WildflowerSearch map]
[BONAP county map]

Varieties 2 (2 in the flora).

Both Dodecatheon conjugens and D. poeticum occur in proximity in the Columbia River gorge. Some specimens here assigned to var. conjugens may have scattered, minute glands on the pedicels that might indicate past hybridization with D. poeticum (e.g., G. N. Jones 6286, ORE; R. R. Halse 3790, OSC, WTU). Dodecatheon poeticum is densely glandular not only on the pedicels, but also on the calyx and scape. The type of minute glandular puberulence seen on var. conjugens found along the Columbia River west of The Dalles is somewhat similar to that seen on var. viscidum in western Montana and Canada. Some plants referred here to D. conjugens have slightly connate filaments that may indicate some intergradation with D. pulchellum var. pulchellum. This suggestion is supported by the tendency in the same plants to have narrower leaves.

Some newly emerged flowers tend to have connectives that are less rugose than normal. This is particularly true of some populations in southern Alberta and, to a lesser degree, in Saskatchewan.

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

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.)

1. Leaf blades, scapes, and pedicels glabrous.
var. conjugens
1. Leaf blades, scapes proximally, and pedicels usually glandular-puberulent.
var. viscidum
Source FNA vol. 8, p. 271. FNA vol. 8, p. 278.
Parent taxa Primulaceae > Dodecatheon Primulaceae > Dodecatheon
Sibling taxa
D. alpinum, D. amethystinum, D. austrofrigidum, D. clevelandii, D. dentatum, 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. clevelandii, 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. conjugens var. conjugens, D. conjugens var. viscidum
Synonyms Primula conjugens Primula austrofrigida
Name authority Greene: Erythea 3: 40. (1895) K. L. Chambers: Sida 22: 462, figs. 1–3. 2006 ,
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