Chamaerhodos: Answers to key questions in Budd's Flora  and Flora of Alberta leading to this genus. 

	plant entirely herbaceous; NOT [plant a half-shrub, with trailing woody stems], NOT [shrubs or trees]
	plant with dense rosettes
	leaves 2-4 ternately divided into linear lobes; NOT [leaves 3-foliolate, the leaflets wedge-shaped], NOT [leaves simple, usually toothed]
	hypanthium lacking hooked prickles; NOT [hypanthium with hooked prickles]
	petals small, little if any longer than the sepals; NOT [petals usually longer than the sepals]
	petals white; NOT [petals yellow]
	stamens 5; NOT [stamens 10-many]
	carpels 5-20; NOT [carpels 10-many], NOT [carpels 2]
	carpels becoming achenes (sometimes on a fleshy receptacle]; NOT [carpels becoming drupelets (raspberry-like)]

Rosaceae: Answers to key questions in Budd's Flora  leading to this family. 

	herbs; NOT [shrubs or trees]
	plants terrestrial or semiaquatic; NOT [plants aquatic, leaves submerged or floating]
	plants NOT with colored milky juice
	plants with more than one normal leaf
	some or all leaves alternate; NOT [leaves opposite, whorled, or basal]
	leaves with stipules; NOT [leaves without stipules, or having glands]
	flowers with two floral rings, and with each petal distinct from the others
	flowers regular in shape; NOT [flowers irregular in shape]
	calyx regular; NOT [calyx irregular, some sepals smaller than others]
	stamens usually separate or partly so, not in a column; NOT [stamens numerous, united into a column]
	ovary of one or more carpels, either separate or enclosed by a fleshy receptacle; NOT [ovary of 5 united carpels]