UC specimens and range limits for Chiharaea silvae

• Blue markers: specimen records
• Yellow marker: type locality, if present
• Red markers: endpoints of range from literature

View map from the Consortium of Pacific Northwest Herbaria

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Chiharaea Johansen 1966

Thalli saxicolous, with extensive crustose bases and articulated fronds. Fronds small, decumbent, compressed and dorsiventrally oriented, irregularly branched, of 14 or fewer intergenicula. Intergenicular medulla with arching tiers of straight cells of same height. Genicula with single tier of long, thick-walled cells. Conceptacles axial, 1-3 per intergeniculum; fertile intergenicula rarely branched; pore on dorsal surface in tetrasporangial plants, central in sexual plants. Spermatangial conceptacles beaked; conceptacular canal 100+ µm long. Fusion cell broad and thin, with carposporangial filaments arising from entire surface.

Arthrocardia silvae Johans.

Johansen 1971a: 241.

Thalli saxicolous; fronds purplish, to 2(3) cm tall, the axes percurrent, the lateral branches vegetative or fertile; axial intergenicula to 1(1.5) mm long, 0.5-1 mm broad, wings lacking or inconspicuous; fertile branches with 1-4 conceptacles, sometimes more in sexual plants; pores of tetrasporangial conceptacles subterminal on 1 surface of fertile intergenicula, this tendency less evident in carposporangial plants; male plants also known.

On rocks, Humboldt Co., Mendocino Co., Pt. Reyes, and from near Carmel River (Monterey Co.), Calif.; locally abundant on exposed intertidal rocks in N. Calif, where it superficially resembles Bossiella plumosa or Corallina frondescens. Type locality: Wheeler (Jackass Creek, Mendocino Co.), Calif.

Excerpt from Abbott, I. A., & Hollenberg, G. J. (1976). Marine algae of California. Stanford University Press, Stanford, California. xii [xiii] + 827 pp., 701 figs.