286 THE TASMANIAN FLOKA. 



lobes, or toothed segments, according to tte robustness of the plant, dark green,, 

 erect or drooping, 6-24 inches, often developing young plants on the pinnules. 

 Abundant. Temperate Australia and Southern Hemisphere. 



Var. laxum. Similar, but without young plants on pinnules. 



Var. hookeriana. Generally stunted, but not separable. A. hookeriana 

 Col. 



Vat. pinnatum. Often large, 6-18 inches. Pinnules entire, coarsely toothed, 

 acute to caudate. Closely approaching A. oUwiatum, Forst. 



6. A. FLACCiDUM, Forvt. Leaves 6-12 inches, narrow, flaccid, once "or twice 

 divided, all segments linear, obtuse. Sori rather broad, one to each [segment,, 

 and pushed to the margin. Imperceptibly passing into slender forms of A. 

 bulbifeium. 



Common in forests. East Australia to New Zealand. 



10. ATHYEIUM. 



Sori linear, diverging, very small, narrow, curved, covered by an indusium 

 opening inwards. 



A. AUSTEALE, Presl. Tufted, caudex somewhat erect. Leaves pale green, 

 fleshy, broad, 2-3 times divided. Ultimate pinnules broadly and obtusely lobed 

 or segmented. Asplenium umbrosum, Sm. "oj?n ■ 



Huon district, west to north-east, in permanently damp situations. Victoria,, 

 New South Wales, Queensland, Asia, Africa, Oceania, New Zealand. 



11. [GYMNOGRAMME. 



Sori linear, diverging on the back of the leaf, ill-defined, diffused or forked,, 

 not protected by an indusium. 



Leaves hairy, pinnate ... 1. O. rutmfolia. 



Leaves very small, 2-3 times divided 2. G. leptophylla. 



1. G. BUTjiFOLiA, H. Tufted. Leaves narrow, 3-6 inches, hairy, pinnate-. 

 Pinnules rhomboid, entire to segmented, i-| inch. Graiumitis rutifolia, R. Br. 



Common in ledges of rocks ; capable of resuscitating after prolonged drought. 

 Extra-tropical Australia, New Zealand, Europe, and America. 



2. G. LEPTOPHYLLA, Dcsv. Annual, from a persistent tuberous base. Leaf 1-2 

 inches broad, 2-3 times divided, pale green. Sporangia diffused on the back of 

 the leaf. Orammitis leptophylla, Swartz. 



Glenorohy, Back River, George's Bay, Spring Bay, &c. Probably widely 

 spread, but overlooked. In all extra-tropical places. 



12. GRAMMITIS. 



Sori oblong, diverging, on the back of the leaf, usually clearly defined. No- 

 indusium. 



G. AUSTRALis, R. Br. Leaf simple, narrow, lanceolate, 2-4 inches, erect. In 

 alpine situations dwarfed, and the sori run together into an irregular mass, and 

 the margms recurved. Polypodiiim australe, Met. 



Very common. Victoria, New South Wales, Queensland, New Zealand, 

 America. 



13. PLATTLOMA. 



Son m the Tasmanian plant continuous or nearly so, in typical forms- 

 mterrupted. Margin incurved, often assuming the character of an indusium. 



