THE PERN WORLD OF AUSTRALIA. 
79 
S. Belangeri, Spring. A small compact plant, creeping, but 
not so intricate as the last, forming patches from one to six inches 
in diameter. The leaves somewhat smaller and of a deeper brighter 
green, the latter in two rows, distichously spreading, scarcely one 
line long, ovate ; two inner rows appressed, rather smaller. Hpikes 
terminal, oblong, rarely above six lines long, two broad, the 
spreading bracts of some very similar to the stem leaves. Port 
Darwin, in North Australia; and Etheridge Kiver, Rockingham 
Bay, Trinity Bay and York Peninsula in Queensland. [Lycopodium 
Belangeri, Bory.] 
Tmesipteris, Bernh. (Notched fern. Named from the position 
of sori, in notch of bract.) Stem simple leafy, the leaves vertical, 
sessile and decurrent, entire, intermixed with leafy bracts, bipartite 
on a short petiole. Spore-cases usually two together, united into 
a capsule-like sorus. Sessile on the petiole of the bracts, trans- 
versely oblong, flattened, two-celled and didymous or two-lobed, 
opening in two valves loculicidally. Spores minute. 
T. tannensis, Bernh. (Supposed to have been first found on the 
Island of Tanna.) Usually a small plant found growing upon 
trees in the cracks of the bark, the stems seldom more than a few 
inches in length, but said to attain two feet in Tasmania. Leaves 
obliquely oblong, about half an inch long or more, truncate or acute 
at the end, the central nerve produced into a fine point. Bracts 
replacing the leaves on the upper part of the stem, deeply divided 
into two segments. Found on trees on the various ranges of 
Queensland, N. S. Wales, Victoria and Tasmania. [Lycopodium 
tannense, Spreng. P. truncatum B. Br. Psilotum Forsteri, Endl. 
Tmesipteris truncata, Desv. T. Forsteri, Endl. T. Billardieri, 
Endl. 
Psilotiim, Swartz. (Naked or destitute of leaves.) Stems 
dichotomus, with distant notches bearing minute scales. Spore- 
cases usually three together, united in a capsule-like sorus. sessile 
in the axil of or attached to the bracts, nearly globular, three-lobed, 
three-celled, opening loculicidally or three valves. Spores minute, 
uniform. 
P. triquetrum, Swartz. (Referring to the three-sided stems.) 
Found on trees and in the crevices of rocks, at times forming large 
tufts, usually pendulous. Stems repeatedly dichotomously 
branched, from a few inches to two or three feet long, three-angled. 
Scale-like leaves minute and subulate, the bracts subtending the 
spore-cases, equally small and distant, but forked. Capsule-like 
sori globular, about one line diameter, attached to the bract below 
the fork. Common on trees and rocks throughout Queensland and 
New South Wales. 
P. complanatum, Swartz. (Alluding to the branches being fiat, 
not triangular, as in the other species.) Stems fiat, dichotomous, 
pendulous, often three to five feet long, two or three lines broad ^ 
rigid or flaccid, the margins alternately notched. Leaves and bracts 
minute. Capsule as in the last species. Rockingham Bay. [P, 
flaccidum. Spring.] 
