Guide to Liverworts of Oregon: Herbertus aduncus (Dicks.) S.F. Gray
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1b plants leafy > 3b leaves not divided, not ciliate > 6a oil bodies 2+ or unknown > 7b no small dorsal lobe > 10a succubous > 11b isophyllous > 25a leaves bilobed more than 0.5 > 26a leaves longer than 1 mm > Herbertus leaves divided more than 0.7 > Herbertus aduncus
Synonym: Herbertus hutchinsiae (Gottsche) Evans (misapplied)
Special Status: ORBIC List 2.
Recognition: The three rows of bifid leaves make this genus unmistakeable among liverworts; it is more likely to be taken for a moss. This species is slightly smaller than H. dicranus; has more deeply divided leaves (greater than 0.7) which are parallel sided to the base; and has underleaves which are little different from the lateral leaves.
Distribution: On rock; in Oregon from Saddle Mountain and in the western end of the Columbia River Gorge.
Comments: The appearance of this is strikingly like a moss, in large part because the slender lobes are secund (curved in the same direction). In coastal Washington State and northwards it also occurs as an epiphyte, forming large masses on small trees.
Jefferson Co., Washington. DHW m1108.
Ucluelet, Tofino, BC. Schofield 13469 (UBC).
Ucluelet, Tofino, BC. Schofield 13469 (UBC).