THE TASMANIAN FLOEA. 



281 



OPHIOGLOSSACEJE (Adders' Tongues). 



Shoot consisting of one leaf divided into two segments, a leaf -like vegetative 

 portion and a more constricted sporangia-bearing portion. Sporangia ratker 

 large, sunk in the substance of the leaf. 



Leaf-segments simple 1. Ophioglo.isum. 



Leaf -segments divided 2. Botrychium. 



1. OPHIOGLOSSUM. 

 Leaf annual, simple, fertile portion clavate. 



0. LUSITANICUM, L. Leaf usually but not always solitary, arising from a' 

 persistent tuberous base. Vegetative poi-tion broadly lanceolate, stalked, about 

 1 inch long. Fertile portion 1-3 inches long, erect, linear. Sporangia in two rows, 

 near the apex, the termination barren and usually acute. O. gramineum, R. Br. ; 

 O. vulffatum, L., partly. 



Near Mount Dromedary, Mount Direction, Formosa, &c., amongst grass. 

 Cosmopolitan. 



2. BOTRYCHIUM. 

 Leaves 'annual, divided. Sporangia superficial. 



Divisions of barren leaflet entire ... ... ... 1. B.lunaria. 



Divisions of barren leaflet 3-lobed ... , 2. B. ternatum. 



1. B. LTJif ARIA, 'iSwa. Leaf 4-8 inches high. Vegetative portion with about 

 8-14 reniform crenated segments. Fertile portion erect, divided. 



Scarce, but widely spread. Victoria, New South Wales, New Zealand. 

 Northern temperate distribution. 



2. B. TEEMATTJM, Swz. Similar to the last, but vegetative portion of the leaf 

 a second or third time divided. B. virginianum, Swz , partly. 



Scarce, but widely distributed. Victoria, New South Wales, Queensland, 

 New Zealand. Temperate northern parts, but not in England. 



Schiztea. 



FILICES (Ferns). 



Stem various, usually perennial. Leaves large, simple to much divided. 

 Sporangia minute, born in clusters or sori naked or covered by an indusium, on 

 the back or mari;in of a leaf similar to, or somewhat difBering from, the purely 

 vegetating leaves. Spores all minute and similar. 



i. Sori at or about the margin ... 

 Sori not aliectinff the margin ... 

 Sori on a comb-like leaf .. . 

 ii. Sori continuous, long ... 



Sori abbreviated 

 iii. Fertile leaves much deformed ... 

 Fertile similar to barren leaves 

 iv. Leaves :2-4 inches, or linear, with euneate 

 segments 

 Leaves large, much divided 

 V. Leaf "2-3 times divided... 

 Leaf with euneate pinnules 

 vi. Leaf -veins forked, but never joining ... 

 Leaf -veins joining in loops 



xu. 



27. 



iii. 

 vii. 

 1. Lomaria. 



iv. 



V. 



vi. 



5. 



13. 



7. 



Cheilanthes. 

 Platyloma. 

 Pterin. 

 Litohrochia. 



