Forsstroemia producta (Hornsch.) Paris, Actes Soc. Linn. Bordeaux

Enroth, J., Fedosov, V. E., Fedorova, A. V., Ignatova, E. A. & Ignatov, M. S., 2019, Miscellaneous notes on the genus Forsstroemia in Russia (Neckeraceae, Bryophyta), Arctoa 28 (1), pp. 18-23 : 20-21

2. Forsstroemia producta (Hornsch.) Paris, Actes Soc. Linn. Bordeaux , 9(3): 175. 1895.

– Pterogonium productum Hornsch., Linnaea 15(1): 138–139. 1841.

Neotype: South Africa (MO, dupl. L), see details in Stark (1987) .

Forsstroemia stricta Laz., Bot. Zhurn. (Kiev) 2(1): 84. 1941. Syn. nov.

Holotype: Russia, Primorsky Territory: Shkotovo Distr., Upper Maikhe River , Peishula , on rotten log, 10.X.1933, A. Lazarenko ( KW!) [description and illustration of this specimen were provided by Ignatov & Cherdantseva, 1995] .

Comment : Ochyra (1988) mentioned this specimen as lectotype. However, only one specimen is cited in the protologue, and Kiew’ Institute of Botany (KW) is the main depositarium of Lazarenko collections, thus we designate the specimen as the holotype.

Forsstroemia stricta was described from a small specimen, and male gemetangia were not found by Lazarenko, so the species was assumed to be dioicous. Ignatov & Cherdantseva (1995) confirmed this. However, subsequently we found this species in two localities and richer material showed an autoicous sexual condition in all collections. Quite many plants, either collected or seen in forest, had sporophytes.

DNA analysis of two specimens from two localities resolved them it an a clade with F. producta from Mexico and U.S.A., confirming their identity. Forsstroemia producta is a pantropical and subtropical species, and the name has numerousmany synonyms used for plants from Asia , Africa, North America and Australia ( Stark, 1987).