50 J. SMITH ON THE GENERA OF FERNS. 



9. NoTHOL.^NA. B. Br. J. Sm. 

 (Pteridis sp. Stv. Cheilanthis. sp. Sw. Cincinnalis. Desv.) 



Veins forked or pinnate. Venules free. Sporangia terminal. 

 Sort round, solitary or laterally confluent, forming a linear, 

 continuous or interrupted, compound, marginal sorus. — Rhi- 

 zoma ccespitose. Fronds pinnate or hi-fripinnate, pilose, or 

 densely squamose, tomentose or farinose, through which the 

 sporangia jn^o^rt^ie atid tvhichare usually few to each sorus; 

 margin sometimes slightly reflexed (indusiiform). 



* Argyrochosma. J. Sin. Fronds covered with a white, 

 farinose powder on their under surface. 



Examp. 1. N. argyrostigma. J. Sm. 2. N. trichoraan- 

 oides. JR. Br. 3. N. nivea. Desv. 4. N. tenera, lloolc. 



** Eriochosma. J. Sm. Frowls densely tomentose. 5. 

 N. tufa. Presl. 6. N. lanuginosa. Desv. 1. N. hypoleuca. 

 Kunz. 8. N. distans. B. Br. 9. N. vestita. J. Sm. (Cheil- 

 anthes. Siv.) 10. N. hirta. /. Sm. (Cheilanthes. Siv.) 11. 

 N. sulcata. LinJc. 12. N. tomentosa. Desv. 13. N. stella- 

 jnlis. J. Sm. 



*** Lepichosma. J. Sm. i^rojit/s densely squamose. 14. 

 N. sinuata. Kaidf. 15. N. Marantae. i?. Br. 16. N. myrio- 

 phylla. ./. Sm. (Cheilanthes. Hook) 17. N.lentigera. J. Sm. 

 (Cheilanthes. -S'u.-.)— Illust. Schh. Crypt, t. 99. Ilooh. Gen. 

 Fil. t. 76. A. 



Ohs. The pilose and farinose habits of several species of 

 this genus, indicate their affinity with the following genus 

 Gymnogramma; but that genus differs in having linear, 

 oblique sori. The terminal sori and free veins also indicate 

 its affinity with Polypodium, but in Notholana, the sori are 

 usually confluent, forming, as it were, a linear, marginal sorus, 

 which, in conjunction with the slightly reflexed indusiifonn 

 margin, distinguishes it from Polypodium ; but the latter char- 

 acter strongly indicates some relationship with Cheilanthes 

 and Cassebeera in Pteridece^ with wbich genera NothoUena 

 has much affinity in habit. 



