UC specimens and range limits for Callophyllis flabellulata

• 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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Callophyllis Kützing 1843

Thalli with circular to fan-shaped, much-divided blades arising from discoid holdfasts. Blades without midrib or veins, divided dichotomously, palmately, or pinnately, occasionally to many fine, narrow divisions. Margins of divisions smooth, crisped, dentate, or laciniate. Medulla of large, pseudoparenchymatous cells mingled with branched, pigmented filaments. Cortex 4 or 5 cells thick, the cells progressively smaller toward surface. Tetrasporangia embedded just below surface, cruciately divided, frequently germinating in place. Spermatangia in superficial patches, formed from outermost cortical cells. Plants procarpic. Plants either polycarpogonial or monocarpogonial with supporting cell becoming auxiliary cell. Cystocarp developing inward, surrounded by sterile tissue; carposporangial masses separated from each other by sterile filaments. Gonimoblasts unilaterally protuberant, each with 1 or more ostioles.

Callophyllis flabellulata Harv.

Harvey 1862: 171; Abbott & Norris 1965: 70; Hollenberg & Abbott 1966: 76 (incl. synonymy).

Thalli 4-l0(l8) cm tall (those of deep subtidal below 5 cm), orange red to dark red, some drying to black, in rounded lax tufts; thalli usually branching 5 or 6 times, the main axis to 5 times as broad as branches of higher orders, the ultimate branches finely dissected, 1-10+ mm wide; gonimoblasts umbonate, with several beaked ostioles, located on or within margin, or on faces of segments of branches, or in both places.

Common, saxicolous or epiphytic, subtidal (to 40 m), Br. Columbia to Baja California. Type locality: Vancouver I., Br. Columbia.

This is the most common species of Callophyllis in this range; the northern specimens tend to be more finely divided than S. Calif. specimens.

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