1.
Hennediella heimii
(Hedwig) R. H. Zander, Bull. Buffalo Soc. Nat. Sci. 32: 248. 1993.
Gymnostomum heimii
Hedwig, Sp. Musc. Frond., 32. 1801;
Desmatodon heimii
(Hedwig) Mitten;
Pottia heimii
(Hedwig) Fürnrohr
Leaves
ovate to broadly lanceolate, tubulose and stiff; distal margins with a 1-stratose border of elongate cells, distal lamina cells 10-16 µm.
Sexual condition
monoicous, either synoicous or autoicous.
Sporophytes
often present.
Seta
5-15 mm.
Capsule
stegocarpous, systilius; theca wide-mouthed, 1-2.4(-3.5) mm; peristome absent.
Varieties 15 (2 in the flora): North America, s South America, Europe, Asia, Pacific Islands (New Zealand), Australia, Antarctica.
In
Hennediella heimii
, European infraspecific taxa attributed to the flora area are not distinct in the New World (see R. T. Wareham 1939). S. Flowers (1973) may have included
H. stanfordensis
in his concept of this species, judging from the description, illustrations and his attribution of dioicy. However, like
H. stanfordensis
, this species may have gemmae borne on proximal rhizoids. This taxon exhibits polymorphisms (discussed by Wareham) with considerable variation in differentiation of the leaf border of elongate cells and marginal dentition, the distal cell ornamentation, and in length of capsule. It may be confused with
Tortula obtusifolia
but that species has no trace of marginal dentition and is yellow in KOH.
