CHAEACTEP.S OF TEIBE3 AND GENEEA. 301 



no less than ten genera, several of which I adopt as 

 sectional names only. 



The species are widely distributed within or near the 

 tropics of both hemispheres. 



* Apices of the venules free. 



t Sori costal {Blechium, Presl.). 



Sp. B. lanceola, Sw. (v v.) var. B. trifoliatum, Kaulf. 

 (v V.) ; B. asplenioides, Siu. {B. unilaterale, Willd.) ; B. 

 glandnlosum, LinJc. (v v.) ; B. cognatum, Presl (v v.) ; B. 

 polypodioides, Badd, Fll. Bras., t. 60, fig. 2 (v v.) ; B. trian- 

 gulare, Link, (v v.) ; B. oocidentale, Linn, (v v.) ; B. cam- 

 pylotis, /. Sm. {v v.) {Lomaria, Kze. ; B. aro'ttattim? G. 

 Gay) ; B. australe, Linn, (v v.) ; B. gracile, Kaulf. (v v.) ; 

 B. long-ifolium, B". B. K. (v v.) ; B. intermedium, Linlc. 

 (v V.) ; B. fraxineum, Willd. (v v.) ; B. Fendleri, Hook. 

 {Sp. Fil., 3 t. 158). 



tt Sori medial or nearly so (Jilesothema, Br.). 



B. hastatum, Kaulf. (v v.). 



Obs. — Presl refers ten species to this section, several of 

 which are not well identified species, and others more 

 properly belong to Lomaria. 



** Apices of the vemdes thickened, forming a cartilaginous 



margin (Blcchnopsis, Presl). 



t Ptiince adherent to the raehis. 



Sp. B. brasiliense, Desv. (v v.) ; B. cartilagiueum, Sw. 



(y v.) ; B. nitidum, Pr. ; B. tovigatnm, Cav. (v v.) ; B. 



orientale, Linn, (v v.) ; B. Pinlaysonianum, Wall. 



ft Pinnw articidatecl toith the raehis {Biafnia, Pr,). 

 B. striatum, It. Br. (v v.) ; B. sernilatum. Rich, (v v.). 



