The reproduction and phenology of Antithamnion cruciatum (Rhodophyta: Ceramiaceae) in insular Newfoundland
Antithamnion cruciatum (C.Ag.) Näg. is reported from insular Newfoundland, its most northerly known location in North America. It exhibits a variable morphology occurring as the typical erect form, as a prostrate form, and as a fragmented form by which it perennates. Zonately divided sporangia conta...
| Published in: | Canadian Journal of Botany |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1977
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/b77-062 http://www.nrcresearchpress.com/doi/pdf/10.1139/b77-062 |
| Summary: | Antithamnion cruciatum (C.Ag.) Näg. is reported from insular Newfoundland, its most northerly known location in North America. It exhibits a variable morphology occurring as the typical erect form, as a prostrate form, and as a fragmented form by which it perennates. Zonately divided sporangia containing four spores have been observed, but their function is unknown. Culture experiments show that the species grows at 10 °C and above, but fertility was not induced. Cytological studies indicate there is no genetic alternation of generations, and chromosome numbers suggest the population may be polyploid. |
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