Landcare Research, Lincoln, New Zealand (CHR) GOK Sainsbury 777 in herb. KWA 4901
Vlota Iutea (Hook.f. & Wilson) Mitt.
Sainsbury (1955a, p. 224) recorded the Fuegian species U. pygmaeothecia (Mull.Hal.) Besch. from Mt. Egmont. Two duplicates of Sainsbury's collection (G.O.K. Sainsbury 777) have been examined but no well developed sporophytes are present. The overall habit of the sterile plants is quite representative of U. lutea. The vegetative leaves of some stems have fewer rows of basal marginal cells than is usual for U. lutea, but on other stems the basal marginal cells form 5-6 rows of hyaline and thick-walled cells. Although spores (reportedly 20-24 μm diam.) have not been seen, the weight of available evidence does not support the recognition of U. pygmaeothecia as part of the N.Z. flora