Difference between revisions of "Dryas drummondii"
Bot. Mag. 57: plate 2972. 1830.
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|name=Dryas drummondii var. eglandulosa | |name=Dryas drummondii var. eglandulosa | ||
|authority=A. E. Porsild | |authority=A. E. Porsild | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=D. drummondii var. tomentosa | |name=D. drummondii var. tomentosa | ||
|authority=(Farr) L. O. Williams | |authority=(Farr) L. O. Williams | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=D. octopetala var. drummondii | |name=D. octopetala var. drummondii | ||
|authority=(Richardson ex Hooker) S. Watson | |authority=(Richardson ex Hooker) S. Watson | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=D. tomentosa | |name=D. tomentosa | ||
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}} | }} | ||
|hierarchy=Rosaceae;Rosaceae subfam. Dryadoideae;Rosaceae tribe Dryadeae;Dryas;Dryas drummondii | |hierarchy=Rosaceae;Rosaceae subfam. Dryadoideae;Rosaceae tribe Dryadeae;Dryas;Dryas drummondii | ||
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name=Dryas drummondii | name=Dryas drummondii | ||
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|authority=Richardson ex Hooker | |authority=Richardson ex Hooker | ||
|rank=species | |rank=species | ||
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|publication year=1830 | |publication year=1830 | ||
|special status=Endemic | |special status=Endemic | ||
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|subfamily=Rosaceae subfam. Dryadoideae | |subfamily=Rosaceae subfam. Dryadoideae | ||
|tribe=Rosaceae tribe Dryadeae | |tribe=Rosaceae tribe Dryadeae | ||
Latest revision as of 22:57, 5 November 2020
Plants 2–23 cm. Leaf blades oblong-elliptic to obovate, 4–38(–46) × 2–24 mm, base usually cuneate, sometimes truncate or cordate, margins flat, crenate, dentate, or ± serrate, sinuses 10–25% to midvein, apex rounded to obtuse, surfaces smooth, tomentose, feathery hairs and stipitate glands absent or on midveins and petioles; basal leaflets 1(–2), 0.5–3 × 0.5–2 mm. Peduncles 40–263 mm. Flowers nodding at flowering; sepals ovate, 4–6 × 3–4 mm; petals 8–10(–12), erect, yellow, 8–12 × 4–7 mm; filaments hairy. Achenes 2.5–3 mm; styles 15–39 mm. 2n = 18.
Phenology: Flowering Jun–Aug(–Sep).
Habitat: Sandy and gravelly beaches, flood plains, stream bars, rocky streams, grassy areas, alpine, calcicolous
Elevation: 0–3000 m
Distribution
Alta., B.C., N.W.T., Ont., Que., Sask., Yukon, Alaska, Mont., Oreg.
Discussion
In some states and provinces, Dryas drummondii has a limited distribution: northwestern Saskatchewan, Lake Superior islands of Ontario (relatively rare elsewhere in Ontario), Gaspé Peninsula, Quebec, northern Montana (Glacier National Park and surrounding area), and northeastern Oregon.
Dryas ×suendermannii Kellerer ex Sündermann, a hybrid between D. drummondii and D. hookeriana, has been reported from Alberta (J. G. Packer 1994). The hybrid shares with D. drummondii abaxial median and lateral leaf veins covered by tomentum, not viscid, stipitate glands absent; adaxial surface not viscid, and punctate glands absent. The hybrid shares with D. hookeriana an adaxially shiny leaf surface. It is intermediate in feathery hairs occasionally present (absent in D. hookeriana).
Selected References
None.