An aberrant form of U. lutea with emergent rather than the more usual exserted capsules. I do not accept U. rufula as part of the N.Z. flora. This material is quite comparable to what has been termed U. breviseta Malta, but I do not consider U. breviseta worthy of recognition.The single specimen from an unspecified Marlborough locality a. McMahon, Jan. 1936, CHR!) referred to Ulota rufula (Mitt.) A.Jaeger by Dixon (Sainsbury, 1955a, p. 225) is considered here to be merely an aberrant form of U. lutea. It is a scant collection with capsules emergent or shortly exserted beyond the perichaetial leaves rather than exserted on a long seta as in more representative U. lutea. In terms of both its gametophytic and sporophytic morphology it is indistinguishable from material of so-called U. breviseta. If, as seems unavoidable, the concept of U. lutea is emended to include short-setaed forms, then the McMahon collection falls in the range of continuous variability of U. lutea.
Specimen notes
Herbarium history:
Herbarium of G.O.K. Sainsbury No.836
CHR Botany Division, DSIR
Christchurch, New Zealand