236 Transactions.— Botany. 
Sticta hirta, Stirton. 
Notwithstanding the varied forms assumed by Sticta urvillei, I am 
tempted to elevate into the rank of a species one of the several specimens sent. 
Thallus widely expanded, reticulate-foveolate, broadly and roundly lobed, 
covered in many places with dense clusters of yellow isidiose efflorescence, 
under surface dark brown, densely tomentose; apothecia reddish brown 
merging into black, margin composed of a mass of radiating isidiose excrescence, 
which, in many instances, almost covers the disk ; spores as in the variety 
colensoi. i 
On bark of trees, Kaka Hill, Wellington. 
Psoroma implexa, Stirton. 
Thallus yellowish brown, smooth above, closely adherent, intricately 
divided into small lobes, which are roundly lacinated, under surface white, 
tomentose (much more so than usual), attached to the bark by a dense mass of 
coarse, stiff, black, branching rhizinæ, which extend considerably beyond the 
thallus ; apothecia moderate, brown, surrounded by a deeply incised lobular 
inflexed thalline margin, which, in a young state, almost conceals the disk ; 
spores eight, simple, elliptical, moderate ; paraphyses not discrete, agglutinate 
at their apices; hypothecium yellowish brown, grumous. 
I have given a rather minute description of a lichen which has puzzled me 
considerably, mainly for the purpose of calling attention to it, as I cannot 
pretend to an intimate knowledge of this intricate and perplexing genus. 
The chemical reactions of K and C on the upper surface and medulla are 
(K—C—). 
On rocks, Tinakori Hills, Wellington. 
Psoroma arthroophyllum, Stirton. 
Thallus greyish brown, thick, continuous, brownish black, and rough on 
the under surface, multifido-laciniate above; lacinie closely imbricated, 
ascending, broad, margins roundly crenate, their under surface somewhat 
paler; apothecia large, rufous, rugose margin elevated, granuloso-concrete ; 
spores eight, colourless, spherical, crenulate, in nearly single file in asci; 
paraphyses indistinct. 
This may be Psoroma euphyllum (N yl.), of which no description is given 
in the “Flora of New Zealand,” nor in any of the later papers to which I have 
access. 
On bark of trees, Tinakori Hills, Wellington. 
Pannaria crustata, Stirton. 
Thallus dark greenish olive, Squamuloso-crustaceous, areolate-diffract ; 
squamules largish, rugose, round, with crenulate turned-up margins ; hypo- 
thallus black, evident; apothecia reddish brown, moderate, flat, or somewhat 
