Class
Family
Classification
Subordinate Taxa
Nomenclature
Scientific Name:
Leptodictyum (Schimp.) Warnst., Krypt.-Fl. Brandenburg, Laubm. 867 (1906)
Synonymy:
- ≡ Amblystegium subgen. Leptodictyum Schimp. (1860)
Type Taxon:
Etymology:
Recognition
Regionally, Leptodictyum is distinguished from Amblystegium primarily by its longer laminal cells. Buck (1998, p. 210) characterised it by having "soft or flaccid plants typically with distantly spaced, wide-spreading leaves. The single costa mostly extends about ⅔ the leaf length, and the leaf cells are relatively long. The alar cells are only poorly, if at all, differentiated". As characterised here, the genus is monotypic and no separate generic description is provided. Its treatment as monotypic agrees with the interpretation of Hedenäs (2003).
Biostatus
Indigenous (Non-endemic)
| Category | Number |
|---|---|
| Indigenous (Non-endemic) | 1 |
| Total | 1 |
Excluded Taxa
Leptodictyum humile (P.Beauv.) H.A.Crum has been applied by R. Ochyra to three specimens in AK. One of these collections, AK 186609, is a mixture of several species including what appears to be Campyliadelphus polygamus. The other two collections (AK 188160, 186607) do not differ significantly from other N.Z. populations of L. riparium; they have upper laminal cells with l:w ratios c. 7–8:1. I see no merit in Ochyra’s determination of this material as L. humile, a species otherwise not recorded from N.Z. The question of the status of L. humile in other parts of the world is beyond the scope of this discussion.
Bibliography
Buck, W.R. 1998: Pleurocarpous mosses of the West Indies. Memoirs of the New York Botanical Garden 82: 1–400.
Fife, A.J. 2014: Amblystegiaceae. In: Heenan, P.B.; Breitwieser, I.; Wilton, A.D. (ed.) Flora of New Zealand — Mosses. Fascicle 1. Manaaki Whenua Press, Lincoln.
Goffinet, B.; Buck, W.R.; Shaw, A.J. 2009: Morphology, anatomy, and classification of the Bryophyta. In: Goffinet, B.; Shaw, A.J. (ed.) Bryophyte Biology. Edition 2. Cambridge University Press, Cambridge. 55–138.
Hedenäs, L. 2003: Amblystegiaceae (Musci). Flora Neotropica Monograph 89: 1–107.
Warnstorf, C. 1904–1906: Laubmoose. Kryptogamenflora der Mark Brandenburg un angrenzender Gebiete herausgegeben von dem Botanischen Verein der Provinz Brandenburg. Gebrüder Borntraeger, Leipzig.
