Dryas integrifolia

Vahl

Skr. Naturhist.-Selsk. 4(2): 171. 1798.

Common names: Entire-leaved mountain-avens dryade a feuilles entières
Illustrated
Treatment appears in FNA Volume 9. Treatment on page 331. Mentioned on page 327, 328.

Plants 3–14 cm. Leaf-blades linear to narrowly ovate or oblong to oval, 2–38 × 0.5–11 mm, base cordate to truncate or cuneate to rounded, margins usually entire or dentate to crenate, sometimes serrate in proximal 1/2, sinuses 5–15 (–20) % to midvein, apex usually obtuse or acute, sometimes acuminate, surfaces usually smooth, sometimes rugulose, abaxial slightly hairy to tomentose, adaxial glabrous or sparsely hairy proximally on midvein, feathery hairs and stipitate-glands absent. Peduncles 10–150 mm. Flowers erect at flowering; sepals linear-lanceolate, 3.5–9 × 1.5–2.5 mm; petals 8 (–9), spreading, usually white or cream, sometimes yellow, 9–14 × 5–11 mm; filaments glabrous. Achenes 0.8–3.5 mm; styles 8–29 mm.

Distribution

V9 542-distribution-map.jpg

Alta., B.C., Man., N.W.T., Nunavut, Ont., Que., Yukon, Alaska, e Asia (Russian Far East)

Discussion

Subspecies 2 (2 in the flora).

Hybrid swarms between the two subspecies of Dryas integrifolia are common (E. Hultén 1968).

Selected References

None.

Key

1 Leaf blades linear to narrowly ovate, margins usually strongly revolute, bases cordate to truncate, apices acute. Dryas integrifolia subsp. integrifolia
1 Leaf blades oblong to oval, margins usually flat, sometimes narrowly revolute, bases cuneate to rounded, apices obtuse. Dryas integrifolia subsp. sylvatica
... more about "Dryas integrifolia"
slightly hairy +  and tomentose +
0.8mm +  and 3.5mm +
hairy +  and glabrous +
Joshua C. Springer +  and Bruce D. Parfitt† +
blackish +, reddish +  and brown +
compound +  and simple +
opposite +  and alternate +
cordate +  and truncate or 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 +
Entire-leaved mountain-avens +  and dryade a feuilles entières +
Alta. +, B.C. +, Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +  and e Asia (Russian Far East) +
not +  and aggregated +
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 />) +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
crassinucellate +
0.2 cm2 mm <br />0.002 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
persistent +
serrate +, dentate to crenate +  and entire +
crenate +  and 1-2-toothed +
inferior +  and superior +
clustered +, biseriate +  and superposed +
1 cm10 mm <br />0.01 m <br /> (15 cm150 mm <br />0.15 m <br />) +
8 (?) +  and 9 (?) +
Yellow (?) +, Cream (?) +  and White (?) +
persistent +  and deciduous +
free +  and distinct +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
adnate +, free +, connate +  and distinct +
Skr. Naturhist.-Selsk. +
not arillate +
persistent +
free +  and distinct +
erect-ascending +, ascending +  and spreading +
linear-lanceolate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Illustrated +
free +  and distinct +
rooting +  and branched +
adnate +  and free +
persistent +
distinct +
basal +, lateral +, subterminal +  and terminal +
elongate +
0.8 cm8 mm <br />0.008 m <br /> (2.9 cm29 mm <br />0.029 m <br />) +
Dryas integrifolia +
species +
inconspicuous +
hemispheric +