1928 CLIV. LYCOPODIACEiE. {Tmesipteris. 



segments like the leaves but smaller and more acute. Capsule-like sori about 2 

 lines broad and 1 line long, much compressed, parallell to the petiole. — Labul. 

 PI. Nov. HoU. ii. 105, t. 252 ; F. v. M. Fragm. v. 112 ; Lyoopodium tannense, 

 Spreng. in Schrad. Journ. 1799, ii. 267 ; Psilotum trunccutum, R. Br. Prod. 164 ; 

 Psiiotum Forsteri, Endl. Iconogr. t. 85; Tmesipteris truncata, Desv, in Ann. Soc. 

 Linn. Par. vi. 192 ; Hook. Gen. Filic. t. 86 ; T. Forsteri, Endl. Prod. Fl. Norf. 

 6 ; Spring, Monogr. Lycop. 255 ; Hook. f. Fl. Tasm. ii. 155 ; T. Billardieri, 

 Endl. 1. c. 6 ; Spring, I.e. 266. 



Hab.: Bellenden Ker Range and Mount Lindsay, W. Hill; Bookingham Bay, Dallachy; and 

 also on mountains generally. 



6. PSILOTUM, Swartz. 

 (Referring to the plants being leafless.) 

 Stems dichotomous, with distant notches bearing minute scale-like leayesi 

 sometimes scarcely prominent, occasionally replaced by equally minute bifid 

 bracts. Spore-cases usually 3 together, united in a capsule-like sorus, sessile in 

 the axil of or attached to the bracts, nearly globular, 3-lobed, 3-celled, opening 

 loculioidally in 3- valves. Spores minute, uniform. 



A small tropical and subtropical genus common to the New and the Old World. Both the 

 Australian species have a wide range in America and Asia, but perhaps one only in Africa. 



Branches, at least the fertile ones angular 1. P. tnquetrum. 



Branches all flat 2. P. complanatum. 



1. P. triquetrum (3-sided), Swartz.; Spring, Monogr. Lycopod. ii. 269; 

 Benth. Fl. Austr. vii. <i81. Rhizome short, intricately branched. Stems erect or 

 pendulous when on trees, from 3 or 4in. to above 1ft. long, repeatedly dichoto- 

 mous in the upper part, the fertile branches 3-angled, the barren ones usually 

 flattened. Scale-like leaves minute and subulate, the bracts subtending the spore- 

 cases equally small and distant but forked. Capsule-like sori globular, about 

 1 line diameter, attached to the bract below the fork. — R. Br. Prod. 161 ; Hook. 

 Gen. Filic. t. 87, Filic Exot. t. 63. 



Hab.: Rockingham Bay, DaZtecftj/ ; Hookhampton and neighbourhood, Bowman, O'Shanesy; 

 Moreton Bay and other southern localities, W. Hill, F. v. Mueller and others. 



In most tropical or subtropical moist regions in the New and the Old World, more rare in 

 Africa. 



2. P. complanatum (flattened), Stvartz.; Spring, Monogr. Lycop. ii. 271 ; 

 Benth. Fl. Austr. vii. 682. Stems dichotomous as in P. triquetrum, but usually 

 longer and looser and the fruiting branches as well as the whole stem flat, 

 varying from 1 to 2 lines broad, rigid or flaccid, the margins alternately notched. 

 Leaves and bracts very minute or almost obsolete. Capsule-like sori smaller 

 than in P. triquetrmn. — P. flaccidum, Spring, I.e. 



Hab.: Rockingham Bay, Dallachy; Bowen, WooUs ; Cairns and Johnston River. 

 Also in tropical Asia and America, the Mascarene and Pacific Islands. 



Order CLV. MARSILEACEiE. 



No true leaves. Fronds as in Piliees proceeding from the rhizome and rolled 

 inwards (eircinate) at the top when young ; barren ones either reduced to a linear 

 stipes or bearing a leaf-like lamina divided into 4 digitate leaflets ; fertile fronds 

 on a shorter stipes or nearly sessile, the lamina recurved with the margins 

 united, forming an ovoid or globular utricle usually called an involucre. Spore- 

 cases of some kinds as in some Lycopodiaoese, but arranged as in Filices in sori 

 inside the involucre (i.e., on the under surface of the recurved frond), each sorus 

 enclosed in a membranous indusium, apparently dividing the involucre into as 

 many cells. 



Ihe Order is limited in Qaeensland to one genus. 



