Guide to Liverworts of Oregon: Key to Calypogeia 2
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Calypogeia 1b oil bodies colorless > Calypogeia 2
Calypogeia fissa, S. Santiam R., Linn Co., Oregon. DHW m1277a
2a Underleaves bifid, often deeply, typically only 2-5 (rarely 6-7) cells along midline, usually
+ or - decurrent
(Couplet 3)
Underleaves. Strawberry Lake, Grant Co., Oregon. DHW 2???
2b Underleaves entire or emarginate, typically (6) 7-10 or more cells up midline from rhizoid initial region to sinus, rounded at base, essentially non-decurrent
(Couplet 6)