Ivesia rhypara var. rhypara
Rosaceae subfam. rosoideae
grimy mousetail
(0.3–)0.4–1.5(–2) dm, usually exceeding leaves by more than 2 cm.
alternate, rarely opposite, pinnately compound, sometimes simple or palmately compound;
stipules present, rarely absent.
10–60(–100)-flowered, (1–)2–5(–7) cm diam.
torus usually enlarged, sometimes small or absent;
carpels 1–260(–450), distinct, free, styles distinct, rarely connate (Roseae);
ovules 1(or 2), collateral (Rubeae) or superposed (Fallugia, Filipendula).
achenes or aggregated achenes sometimes with fleshy, urn-shaped hypanthium or enlarged torus, sometimes aggregated drupelets;
styles persistent or deciduous, not elongate (elongate but not plumose in Geum).
= 7(8).
Ivesia rhypara var. rhypara
Rosaceae subfam. rosoideae
Of conservation concern.
Variety rhypara is known from widely scattered locations in central Malheur and southeastern Lake counties, Oregon, and in northern Washoe, Humboldt, and Elko counties, Nevada. Although not overtly petrophytic, plants are generally associated with crevices in the underlying bedrock (E. M. Clark and W. H. Clark 2003). They might thereby benefit from a more favorable water relationship, allowing them to be in full bloom when most associated species are summer-dormant.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Variation in the number of genera in subfam. Rosoideae is due to differences in generic delimitation between D. Potter et al. (2007) and the authors of some Potentilleae genera. Cyanogenic glycosides and sorbitol are absent in the subfamily.
Tribes 6, genera 28–35, species ca. 1600 (6 tribes, 26 genera, 302 species, including 1 hybrid, in the flora)
(Discussion copyrighted by Flora of North America; reprinted with permission.)
OR
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