UC specimens and range limits for Gloiosiphonia verticillaris

• 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

Search Sequences in GenBank

Gloiosiphonia Berkeley 1833

Thalli with large gametangial stages alternating with small, crustose, tetrasporangial phases. Gametangial plants gregarious, tufted, branched in whorls or radially. Branches slender, attenuate, very gelatinous to firm; younger branches internally with 4 loosely compacted laterals; older branches thickened by rhizoidal filaments formed from basal cells of laterals. Tetrasporangia cruciately divided, borne on crustose stage resembling Cruoriopsis (Peyssonelliaceae). Spermatangia in superficial patches. Carpogonial branches short, usually 3-celled; auxiliary-cell branch separated from carpogonial branch. Carpogonium, after fertilization, reorganizing into 2 or 3 connecting filaments, these fusing with 1 or more auxiliary cells intercalary in auxiliary-cell branch. Gonimoblasts small, all cells becoming carposporangia.

Gloiosiphonia verticillaris Farl.

Farlow 1889: 3; Smith 1944: 209.

Thalli deep rose, slippery, in gregarious tufts 20-30(60) cm tall; axes cylindrical, infrequently divided, to 3 mm wide; branches whorled; branchlets simple when young, frequently repeatedly divided to third and fourth order in upper parts of thallus, especially when cystocarpic; branches thickened by internal rhizoidal filaments when older; plants dioecious (protandrous?).

Locally abundant spring annual, saxicolous, low intertidal in areas scoured by sand, Alaska to San Luis Obispo Co., Calif. Type locality: Santa Cruz, Calif.

Far more common than G. capillaris in Calif.; the tetrasporangial stage, as yet unknown, is expected to be similar to that of G. capillaris.

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