163,778 species and infraspecific names are in the database, 22,783 images, 63,043 bibliographic items, 481,364 distributional records.

Species References

Polysiphonia urceolata f. urceolata J.Agardh

References
(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

Edelstein, T. & McLachlan, J. (1967). Cystocarps and tetrasporangia on the same thallus in Membranoptera alata and Polysiphonia urceolata. British Phycological Bulletin 3: 185-187.
Kapraun, D.F. (1979). Comparative studies of Polysiphonia urceolata (Lightf.) Grev. (Rhodophyta, Ceramiales) from three North Atlantic sites. Norwegian Journal of Botany 26: 269-276.
Kylin, H. (1937). Über anatomie und fruchtentwicklung bei Polysiphonia urceolata. Kungliga Fysiografiska Sällskapets i Lund Förhandlingar 7: 1-6.
Lawson, R.P. & Russell, G. (1967). Simultaneous occurence of carposporophytes and tetrasporangia in Polysiphonia urceolata. British Phycological Journal 3: 249-250.
Lawson, R.P. & Russell, G. (1967). Simultaneous occurrence of carposporophytes and tetrasporangia in Polysiphonia urceolata. British Phycological Bulletin 3: 249-250.

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