CHARACTERS OP TRIBES AND GENERA. 247 



sori with Alsophila, I refer them to the Hymenoslegia section 

 of that genus, restricting Hemitelia to about a dozen species, 

 which are readily distinguished from AlsopJiila by the lower 

 venules anastomosing opposite the sinus of the lacinae, 

 but in some species this character is wanting, the whole of 

 the venules being free ; their habit of growth and broad 

 divisions of the fronds is indicative of their relationship to 

 be with Hemitelia rather than with AlsopJiila ; it, however, 

 must be admitted that although the typical species of 

 Cyathea, Hemitelia, and Alsophila, warrant their separation 

 as distinct genera, the transition species however appears 

 to unite them so as to form one natural group. The 

 species as here restricted to Hemitelia, are all natives of the 

 West Indies and Tropical America. 



* Fronds pinnate ; pinnce entire. 



Sp. H. speciosa (Kaulf.) (v v.) ; H. Lindeni (Hook.) ; 

 H. grandifolia (Sprang.) (v v.) ; H. obtusa (Kaulf.) (v v.) 



** Fronds bipinnatiftd. 



H. Imyrana (Hook.) (v v.) ; H. Karsteniana (Hook.) 

 (v v.) ; H. horrida (R. Br.) (v v.) ; H. marginalis (/. Sm.). 



132. ALSOPHILA, E. Br. (1810). 

 Hook. Sp. Fil. -, Amphicosmia Gar A. 



Vernation fasciculate, erect, arborescent. Fronds bi-tri- 

 pinnatifid, 5 to 15 feet long. Veins simple or forked, free. 

 Sori axillary or medial. Receptacles elevated, globose, or 

 columnar. Indusium semi-calciform, or small and squarme- 

 form, often wanting, in some trichiferous. 

 Type. Cyathea multiftora, Sm. 



