. CHEI1ANTKEJE. XXiVll. 



(b) Veins reticulated. 



43. HEWARDIA, J: Smii!A, 00*. Journ. Sot. iii. 432, t. 



1617. 

 ADIAHTI, sp., Auct. 



Sori indusiate, transverse marginal, linear, continuous; the 

 receptacles and indusium as in Adiantum. Veins uniform, retic- 

 ulated, with or without a costa ; venules anastomosing in elon- 

 gated areoles, without included free veinlets. 



Fronds sub-coriaceous or membranaceous, pinnate bi-pinnate 

 or pedately tri-pinnate. Stipes and rachis ebeneous. Rhizome 

 short creeping ? This genus is distinguished from Adiantum by 

 the reticulation of the veins. 



Hewardia. Costa medial 

 Ex. : H. adiantoides, J. Sm. 1 H. dolosa. Fee. 



H. serrata, Fee. 



Isotes. Costa wanting, veins equal or uniform. 

 Ex. : H. Leprieurii, Fee. 



CHEILANTHEjE. 



(a) Sori marginal, terminal on the veins. 



44. ADIAKTOPSIS, Fee, Gen. Ml. 145. 



ACTIWOPTESIS. J. Smith; AspiDOTis, Nuttal 3fS. (Hook.) ; HTPOLB- 

 PIDIS sp., Hooker ; ADIANTI sp., Anct. ; CHEILANTHIS sp., Auct. 



Sori indusiate, transverse marginal, oligocarpous, sub-orbic- 

 ular ; the receptacles punctiform at the apex of the veins. Indu- 

 sium roundish, thin, membranaceous. Veins simple or forked 

 from a central flexuose sometimes indistinct or 'evanescent 

 costa; venules free. * 



Fronds herbaceous, pinnate or bi-tri-pinnate, sometimes pen- 

 tangular or radiate ; pinnules (or pinnae) articulated or continuous, 

 sometimes sub-dimidiate. Stipes and rachis ebeneous. Rhizome 

 ehort, tufted or creeping. The adianti-cheilanthoid aspect of 

 these plants, rather than any exact technical character, has been 

 thought sufficient to separate them from Cheilanthes, and in this 

 view we doubtfully concur. With Hypolepis they certainly have 

 less direct affinity than with Cheilanthes. 



Ex. : A. capensis, Fee. \ A. radiata, Fee. 



A. pteroides (Cheilanthes, Sv.J A. monticola (Cheilanthes, GardnJ 

 A. californica (Hypolepis, Hk .) \ A. Schimperi, (Cheilanthes, Kze .) 



D3 



