Dryas drummondii

Richardson ex Hooker

Bot. Mag. 57: plate 2972. 1830.

Common names: Drummond’s or yellow mountain-avens dryade de Drummond
Endemic
Synonyms: Dryas drummondii var. eglandulosa A. E. Porsild D. drummondii var. tomentosa (Farr) L. O. Williams D. octopetala var. drummondii (Richardson ex Hooker) S. Watson D. tomentosa
Treatment appears in FNA Volume 9. Treatment on page 328. Mentioned on page 327, 331.

Plants 2–23 cm. Leaf-blades oblongelliptic 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

V9 535-distribution-map.jpg

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.

Lower Taxa

None.
... more about "Dryas drummondii"
woolly +  and tomentose +
2.5mm +  and 3mm +
hairy +, tomentose +  and glabrous +
Joshua C. Springer +  and Bruce D. Parfitt† +
Richardson ex Hooker +
blackish +, reddish +  and brown +
compound +  and simple +
opposite +  and alternate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
cordate +, truncate +  and cuneate +
3.9 cm39 mm <br />0.039 m <br /> (4.6 cm46 mm <br />0.046 m <br />) +
smooth +  and rugose +
ovate +, oval +, obovate +, oblongelliptic +, oblong +, linear +, lanceolate +  and elliptic +
0.2 cm2 mm <br />0.002 m <br /> (3.9 cm39 mm <br />0.039 m <br />) +
stoloniferous +
free +  and distinct +
Drummond’s or yellow mountain-avens +  and dryade de Drummond +
Alta. +, B.C. +, N.W.T. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Mont. +  and Oreg. +
not +  and aggregated +
0–3000 m +
stipitate-glandular +  and villous +
1.3 cm13 mm <br />0.013 m <br /> (2.9 cm29 mm <br />0.029 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
linear +  and lanceolate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Sandy and gravelly beaches, flood plains, stream bars, rocky streams, grassy areas, alpine, calcicolous +
on midveins and petioles +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
crassinucellate +
3.8 cm38 mm <br />0.038 m <br /> (4.6 cm46 mm <br />0.046 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
persistent +
serrate +  and dentate +
inferior +  and superior +
clustered +, biseriate +  and superposed +
4 cm40 mm <br />0.04 m <br /> (26.3 cm263 mm <br />0.263 m <br />) +
persistent +  and deciduous +
free +  and distinct +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
8 +  and 10 +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering Jun–Aug(–Sep). +
adnate +, free +, connate +  and distinct +
not arillate +
persistent +
free +  and distinct +
erect-ascending +, ascending +  and spreading +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
free +  and distinct +
rooting +  and branched +
adnate +  and free +
persistent +
distinct +
basal +, lateral +, subterminal +  and terminal +
elongate +
1.5 cm15 mm <br />0.015 m <br /> (3.9 cm39 mm <br />0.039 m <br />) +
Dryas drummondii var. eglandulosa +, D. drummondii var. tomentosa +, D. octopetala var. drummondii +  and D. tomentosa +
Dryas drummondii +
species +
inconspicuous +
hemispheric +