526 DR. LINDSAY ON NEW-ZEALAND LICHENS. 
associated with var. florida: sterile, sorediiferous, of a reddish colour, partly referable to 
var. plicata, partly to florida. Fig. 28: Jamaica (Wilson): spores oval, 00025" long, 
00020” broad. 
4. Fig. 22: Rio Janeiro (Henry Paul, 1846). Spores (5, c) slightly variable as to size, 
form, and colour: oval-oblong, oval, or subspherieal; simple, margined in maturity ; 
sometimes pale yellow (endospore), more generally colourless. Thecæ (e, e) also some- 
what variable as to size, short and subsaccate, deep blue with iodine (e). 
B. Var. florida, L. (Fig. 24.) | 
On trees in the bush, Pelichet Bay, Dunedin, Otago: W. L. L.: fruit abundant, 
Spores (b, c, d) oblong-ellipsoid or subspherical, simple, colourless, ‘0003" long, :0002" 
broad. Thecæ (a) 8-spored, :0012" to -0015" long, ‘00045” broad. Paraphyses closely 
aggregated. Hymenium blue with iodine; constituents somewhat indistinct. "Thallus 
dwarfish, 1-14 inch tall, with articulate branches. This annular decortication, indeed, 
is, like many other characters on which separately named varieties have been founded, 
common to all forms or conditions of U. barbata, though it is more marked in some of 
the larger and terricolous forms. Hence a var. articulata is not only unnatural and 
incorrect, but mischievous in classification, just as vars. ceratina, hirta, florida, and 
plicata are. These represent simply conditions which are not unfrequently combined 
in some individual plant; in which case the unfortunate student is utterly puzzled to 
what variety to refer it, partaking, as it does, of the characters of two or more 
varieties. 
In herbarium Hooker: on old trees, chiefly Mangroves, North Island (Dr. Joliffe, 
1852): sterile. Other North-Island specimens are fertile, with an ochroleucous thallus, oval 
or subspherical spores, and small obovate thecæ, blue with iodine. Fig. 25: Tasmania (Dr. 
Hooker, Antarct. Exped.). Spores (d, e) oblong-ellipsoid, longer, though not broader, than 
in Tasmanian forms of var. hirta. Thecæ (b) blue with iodine, longer and narrower 
than in Tasmanian forms of var. hirta. In the latter, collected by Lawrence, the 
spores (fig. 44) are subspherical and small, and the thecæ blue with iodine, short, and 
broad. 
C. Var. articulata, Fr. 
On trees, Saddle-hill bush: sterile. This appears to be merely a condition of florida, 
with annular decortication. The joints or articulations are not inflated; the thalline 
segments are narrow, filiform, and very smooth; the plant possesses the waxy aspect 
and the delicate lemon-yellow hue so common in U. barbata in warm countries, with 
patches, here and there, of ochraceous discoloration. 
D. Var. plicata, Fr. 
On trees in the forests of Mount Cargill, Dunedin, Otago: W. L. L.: very abundant. 
In herbarium Kew: Waiheki, North Island, on stones and trees, frequent (Milne, 
HMS. * Herald, 1854). Agrees apparently with U. trichodea, Nyl., which seems only 
an exaggerated form, peculiar to warm countries, the filaments being very long, deli- 
eate, and much entangled. Specimens from Norfolk Island, St. Domingo, &c-, mit 
similar character. U. angulata, Ach., Hook. fil and Tayl, from Ceylon (fig. 26) 
seems to me referable to U. longissima, Ach. (fig. 40), which again is referable Ww e 
