Guide to Liverworts of Oregon: Cephaloziella spinigera (Lindb.) Joerg.
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Synonym:
Special Status: ORBIC List 2.
Recognition: A very small plant growing in bog-like wetlands. It has deeply bilobed leaves that often have small, sharp teeth near the leaf base. Presence of dentate bracts subtending the perianth is the main field character indicating this species.
Distribution: On peat and over peat forming mosses; in coastal and montane fens, Lane and Klamath Counties. It extends as far south as Mendocino County, California.
Comments: This plant is probably as much overlooked as rare but still not common. Cephaloziella spinigera is very similar to C. elachista, from which it differs in having smaller leaf cells with thicker walls. Unlike C. elachista it may grow in fens and wetlands in the absence of Sphagnum.
Shoot with perianth. Woahink Lake, Lane County, Oregon. S. Sundberg 735.
Shoot with perianth. Woahink Lake, Lane County, Oregon. S. Sundberg 735.
Autoicous fragment. Woahink Lake, Lane County, Oregon. S. Sundberg 735.
Sterile shoots. Bull Swamp, Klamath County, Oregon. DHW 9031a.
Sterile shoots; oil bodies in leaves. Bull Swamp, Klamath County, Oregon. DHW 9031a.
Quaking Aspen Swamp, Lane County, Oregon. D. Stone 9070. Left leaf cells average 12.6 μm wide, 23.0 μm long, n=7; right leaf cells average 10.2 μm wide, 18.9 μm long, n=11.
Quaking Aspen Swamp, Lane County, Oregon. D. Stone 9070. Leaf cells average 11.8 μm wide, 23.7 μm long, n=14.
Quaking Aspen Swamp, Lane County, Oregon. D. Stone 9070. Leaf cells average 11.3 μm wide, 20.8 μm long, n=6.
Quaking Aspen Swamp, Lane County, Oregon. D. Stone 9070. Leaf cells average 13 μm wide, 21.1 μm long, n=15.
Stained with toluidine blue. Quartz Creek Camp, Seward Peninsula, Alaska, USA. Potemkin 935002 (ALA).
Perianth mouth. Stained with toluidine blue. Quartz Creek Camp, Seward Peninsula, Alaska, USA. Potemkin 935002 (ALA).
Cephaloziella spinigera Shoots among roots of Ericaceae. Jackson State Demonstration Forest, Mendocino County, California. DHW m3038.
Cephaloziella spinigera Leaf lobe showing oil bodies in cells. Jackson State Demonstration Forest, Mendocino County, California. DHW m3038.
Cephaloziella spinigera Sterile shoot, living. Parish Lake, Linn County, Oregon. DHW m3093.
Cephaloziella spinigera Male shoot, lateral aspect. Parish Lake, Linn County, Oregon. DHW m3093.
Cephaloziella spinigera Two androecia. Parish Lake, Linn County, Oregon. DHW m3093.