UMIVERSITATIS LATVIENSIS - DSpace

Dixon (1926) has considered as being identical with U.
lutea the following Orthotrichum species of R. Brown: O. gra-
ciHimum, O. flexifolium,
O. tortulosum, O. parvulum, and has
suggested that 0. erectum R. Brown ter. in Trans. N. Z. Inst,
vol. 27, p. 441 (1894)
and O. otiraēnse R. Brown ter. in Trans.
N. Z. Inst. vol. 35, p. 333 (1902), the types
seen, may also belong to U. lutea. Through
kindness I have been able to examine the types
of which he had not
Mr. H. N. Di x on's
of the 4 first-
named species and can prove that O. gracillimum certainly
belongs to U. lutea in the delimitation given in this paper. The
3 other species will be found below in their respective places.
As to the two last species, the types of which are presumably
lacking in R. Brown's herbarium, nothing
definite can be said.
As is to be seen from the list of the localities from which
specimens have been examined, b. lutea is not rare in Tasma-
nia and in the South Island of New Zealand. From the North
Island of New Zealand I have seen no plants and from Australia
the only one is the specimen mentioned above. Another speci-
men from this country labelled as U. lutea I found in C. Mül-
lems herbarium, but it proved
to be Orthotrichum tasmanicum.
It may be met with in other herbaria too. It is labelled: "Vic-
toria, leg. F. M. Campbell, 1889".
I To U. lutea belonged all specimens
and a part of those determined as U. fulva
determined as U. crispa
Brid. In spite of
Wa 11 s & Whitelegge's (1905) and Rod w a y's (1914)
data neither species occurs in Australasia, the first being confined
to the Northern Hemisphere and the second to the Madagascar
region.
9
1
Ulota brevisetcr n. sp. )
Autoicous. Leaves curled when dry, erecto-patent when
moist, lineal-lanceolate, subacute with a broad, oval or widely
oval, concave base, caniculate; margins usually plane, some-
times recurved at one side, minute denticulate in the upper part
of the base; nerve protruding on the back. Cells in the middle
of the base narrow and incrassate, at the margins
of the base
up to 10 or more rows of cells forming a conspicuous hyaline
band; cells in the upper part of the leaf small, ca. 8 \i, minu-
tely and densely papillose. Perichaetial bracts very broad, lan-
J
) Folia sicca crispata, c basi vel oblonga obovata lineari-lanceolata, cel-
lulis basalibus externis in seriebus pluribus limbum hyalinum latum efformanti-
bus. Vaginula nuda vel sparse paraphysata. Seta breviuscula. Theca subcy-
lindrica sub ore coarcata, stomatibus ad basin thecae positis. Calyptra valde
piloša. Peristomium duplex infra orem longe insertum.