Ivesia shockleyi var. ostleri
Rosaceae subfam. rosoideae
Ostler's mousetail, Ostler's or Wah Wah ivesia
(0.2–)0.5–1.5 dm.
alternate, rarely opposite, pinnately compound, sometimes simple or palmately compound;
stipules present, rarely absent.
(2–)4–12(–14) cm;
leaflets 7–15(–18) per side, lobes (4–)6–10(–12), oblanceolate to obovate or elliptic.
0.5–2.5 cm, blade reduced pinnate, lateral leaflets 1–3 per side.
5–20-flowered, (1–)3–4(–6) cm diam. 2n = 28.
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 shockleyi var. ostleri
Rosaceae subfam. rosoideae
Of conservation concern.
Variety ostleri is known from the Needle Range and Wah Wah Mountains of Beaver County, Utah. A report from the Snake Range, White Pine County, Nevada (G. Clifton, unpubl.) remains to be verified.
(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.)
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