CLASSIFICATION. 



Sori terminal or on the back or fork of the veins, consisting 

 of few sessile f sub-sessile sporangia with a transverse or 

 oblique annulus and vertical dehiscence. Indusium 0. 



3. Gleicheniace» (p. 135). 



4. The Climbing-fern Family. (Tribe Lygodieae.) 



Ferns with unlimited apical growth to their leaf rachis, 

 which is solitary and resembles a twining stem, on which the 

 primary pinnae resemble leaves or branchlets. Sporangia 

 large borne dorsally on special spike-like lobes of the fertile 

 pinnae ; each on a vein with an involucre-like indusium. 

 Indusia imbricate. Annulus small apical. 



4. Schizaeaceae (p. 136), 

 Order II— Marattiales. 



5. The'Angiopteris Family. 



Large ferns with a very short stout unbranched stem. 

 L. with a stipular sheath at the base of the swollen petiole. 

 Pinnae articulate. Sporangia sessile closely collected in two 

 ranks into sori on the under -surface near the margin of the 

 unmodified fertile frond. Wall of sporangia of several cells 

 thick opening by a fissure without an evident annulus., 



5. Marattiaceae (p. 13?). 

 Division-PHANEROGAMA. 



Sub-division I.— Gymnospermae 

 Class I.— Cycadineae. 

 1. The Cycad or Palm-fern Family. 



Trunk short. L. large pinnate coriaceous. Male flowers 

 in cones. Fern, sporophylls or carpels laxly imbricate ou 

 the main axis, carpels pinnatifid. 1, Cycadacea; (p- 137). 



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