Callilithophytum parcum
(Setchell & Foslie) P.W. Gabrielson, W.H. Adey, G.P. Johnson & J.J. Hernandez-KantunDatabase links
- Blue markers: specimen records
- Yellow marker: type locality, if present
- Red markers: endpoints of range from literature
Illustration from DeCew's Guide to the Seaweeds of British Columbia, Washington, Oregon, and Northern California
Clathromorphum Foslie 1898
Thalli crustose, lacking genicula, saxicolous or epiphytic (as in Calif. species). Hypothallial and perithallial cells not in tiers; epithallium polystromatic, to 5 cell layers thick, photosynthetic. Secondary pit-connections lacking, intercellular fusions present. Roofs of male conceptacles formed by horizontal separation of tissue in fertile area; roofs of female conceptacles formed by overgrowth of surrounding tissue; tetrasporangial conceptacles multiporate.
Clathromorphum parcum (Setch. & Fosl.) Adey
Lithothamnium parcum Setchell & Foslie 1907: 14. Clathromorphum parcum (Setch. & Fosl.) Adey 1970: 27. Polyporolithon parcum (Setch. & Fosl.) Mason 1953: 318.
Thalli discoid, lavender to purplish, to 2+ cm diam., to 3 mm thick, attached to hosts by central stalks; upper surface plane, slightly convex, or undulate, margins smooth; tetrasporangial conceptacles not crowded, 0.3-0.5 mm diam., the roofs with 15-25 pores; male and female plants also known.
Common on articulated corallines, especially Calliarthron, N. Wash. to San Luis Obispo Co., Calif. Type locality: Pacific Grove, 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.
