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Fie. 1. P l a t y z o m a . - » , portion of a frond ; b, pinnæ (underside) ;
c, fertile pinna laid open, showing veins and a sorus ; d, capsule.
Fig. 2 . G l e i c h e n i a . - » , § Eugleichenia ; b, sorus of ditto ; c,
5 Mertensia ; d, sorus ; e, capsule.
F ig 3. T h y e s o p t e r i s . — a, sterile, and b, fertile pmnules ; c, sorus
and involucre ; d, the same cut through vertically ; e, capsule.
Fig. 4. CvATHEA.— a, f e r tile p in n u le ; b, so ru s a n d in v o lu c r e ;
c, in v o lu c r e from w h ic h t h e c a p su le s h a v e fa lle n .
Fig. 5. H e m i t e l i a .— » , § Amphicosmia ; b, § Euhemitelia ; c, sorus,
w ith the scale-like involucre.
Fig. 6. A l s o p h i l a . - a, fertile segment ; b, sorus cut through
vertically ; c, capsule.
Fig. 7. D i a c a l p e . - » , fertile pinnule ; b, sorus, with perfect involucre
; c, the same, with the involucre bursting open ; d, capsule.
Fio-. 8. M a to n ia .— », s e gm e n ts , w i th 2 s o n ; 6, c, s in g le s o n ,
c o v e r e d w i th t h e in v o lu c r e ; d, in v o lu c r e la id o p e n , sh ow in g th e
so ru s ; e, d itto , th e s o ru s rem o v e d ; / , c ap su le .
F ig 9. O noclea.— », b, sterile segment of § Struthiopteris ; c,
fertile pinna of ditto ; d, single fertile pinnule, enclosing the son
and involucres. (§ Euonoclea has free venation.)
Pig. 10. H y p o d e r r is.— », portion of a fertile frond ; b, sorus and
involucre.
Fig. 11. W o o d s i a .— » , § Euwoodsia ; 6 , involucre ; c, § Physe-
matium ; d, sorus and involucre o f the same.
Fig. 12. S p h æ r o p t e r i s .— » , fertile pinnule; b, sorus and stalked
in v o llc r e ; c, ditto, seen from the underside.
Titch, lirh Ymcecit 'Bi.-oo'k-i.imp
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