UC specimens and range limits for Farlowia conferta

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

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Farlowia J. Agardh 1876

Thalli erect, solitary or in clusters, arising from small, discoid bases. Erect portion freely branched, the branching distichous, alternate to subopposite. Branches compressed, with or without percurrent axes; on drying, some branches appearing to have midrib and broken lateral veins owing to formation of many rhizoidal filaments around axial strands. Cortex of compacted filaments in rows of 6-8 cells. Medulla of periclinally directed rhizoidal filaments grouped around uniaxial strand. Tetrasporangia rare, irregularly cruciately divided, forming irregular sori, scarcely modifying surrounding cortical cells. Spermatangia in superficial patches. Carpogonial branches and auxiliary cell branches of 10-18 cells. Carpogonium fusing with nutritive cell through a short process, producing 1 filament that connects with 1 or more successively remote intercalary auxiliary cells. Gonimoblasts small, formed in groups, raising thallus surface in irregular nemathecioid areas.

Farlowia conferta (Setch.) Abb.

Leptocladia conferta Setchell 1912: 252; Smith 1944: 206. Farlowia conferta (Setch.) Abbott 1968: 186. Pikea nootkana sensu Doty 1947b: 164.

Thalli 15-20(30) cm tall, dark red, drying to black, with several axes arising from fleshy, peglike holdfasts. Axes 1-3 mm wide, dichotomously or subdichotomously branched, at times percurrent, terete to somewhat compressed but with raised central portion occasionally resembling midrib, with frequent fasciculate proliferations on main axes and on secondorder branches; medulla well defined, of densely interwoven, periclinally directed filaments, with single axial strand; cortex of 6-8 dichotomously branched cell layers; tetrasporangia irregularly cruciately divided, in unmodified sori near apices of branches; fertile female areas throughout terminal branchlets, resembling nemathecia; development of gonimoblast as for genus.

Locally common, saxicolous in sand-swept areas, low intertidal, S. Ore. to Cayucos (San Luis Obispo Co.), Calif. Type locality: Dillon Beach (Marin 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.