Dryas integrifolia
Skr. Naturhist.-Selsk. 4(2): 171. 1798.
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
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 |
"thin" is not a number.