284 THE TASMANIAN FLOBA. 



3. LINDSAYA. 



Sori contioiious or interrupted, on tlie margin in a cup-like depression opening- 

 outwards, formed by the indusium and leaf margin. Differing from Davallia 

 only in habit. 



Leaves linear, with rhomboid pinnules ... ... 1. L. linearis. 



Leaves 2 3 times divided 2. L. trichomanoides.. 



1. L. LINEARIS, Smartz. Leaves 2-6 inches, linear. Pinnules numerous^ 

 rhomboid, mostly opposite. Fertile pinnules deformed. 



Very common on heaths. Extra-tropical Australia to New Zealand. 



2. L. TEICHOMANOIDES, Dry. Leaves 3-4 inches, erect. Pinnules once or twice 

 divided, lobes broadly linear and obtuse. Fertile pinnules not deformed, tipped 

 by the sori. 



In woody situations, in the west and north-west. New South Wales and New 

 Zealand. 



4. ADIANTUM. 



Sori on the margin, small, interrupted, protected by an overlapping indusial 

 leaf margin. 



A. jETHiopicum, Linn. Leaf 4-12 inches, many times divided into distant, 

 slender, stalked pinnules. Pinnules rhomboid or reniform, 2-3 lines broad. Sori 

 causing semi-circular depressions in the margin. 



Very common in well-drained rocky pastures. In all temperate and 

 sub-tropical places. 



5. CHEILANTHES. 



Sori continuous or more often interrupted, near the margin, no true indusium,. 

 but partially protected by the incurved margin. 



C. TENmroLiA, Swartz. Leaves erect, 4-6 inches, much divided. 



Very common on hills. Throughout Australia. Asia to New Zealand. 



6. DOODIA. 



Sori short, linear to oblong, in one or more lines, parallel to the midrib of the- 

 pinnule, covered by an indusium opening inwards. Differs from Woodmardia in 

 the sori being superficial. 



D. CAUDATA, R. Br. Leaves narrow, lanceolate, terminating with a long, 

 undivided, narrowing lobe. Pinnules attached by midrib only, and lobed 

 at the lower end, becoming broadly attached above. Margin serrate, some 

 forms rather delicate and with one row of sori, others coarse and harsh with two. 

 to more row.s, and approaching D. aspera, but never pinnatisect. 



Mount Wellington. Common in north and west. Eastern Australia to New 

 Zealand. 



7. PTERIS. 



Sori marginal, continuous, protected by a membranous indusium continuous 

 with the incurved margin. Veins of pinnules forked, but not joining. Leaves 

 much divided. 



Coarse, hard ; segments narrow I. P. aquilina. 



Delicate, fragile ; segments broad 2. P. tremula. 



1. P. AQUILINA, L. Leaf erect, 2-8 feet, stiff, dark green. Stem creeping,, 

 subterranean. 



Universal in temperate and extra-tropical distribution. 



