Guide to Liverworts of Oregon: Key to Riccardia 2
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Riccardia 1b oil bodies present in many cells > Riccardia 2
Riccardia chamaedryfolia, Yaquina Head, Licoln County, Oregon. DHW m2245a.
2a Oil bodies present in most (> 70%) epidermal and marginal cells (and also in most hypodermal cells); thallus rounded, flat, or sometimes channeled above, section oval to lunate; monoicous
Riccardia chamedryfolia
Riccardia multifida, Yaquina Head, Licoln County, Oregon. DHW m2243.
2b Oil bodies in few (< 20%) epidermal and marginal cells (although present in most inner cells); thallus round on top, section oval; monoicous or dioicous
(Couplet 3)