72 
CATALOGUE OP PERNS. 
Tribe VII. CYATHE2E, J. Sm. 
Sori round, intramarginal. Sporangia generally sessile, com- 
pactly seated on an elevated, globose or columnar receptacle, 
furnished with a special indusium attached either completely or 
only half round the base of the receptacle, forming a calyciform 
or semicalyciform cup ; sometimes the attachment is less than 
half round, the indusium being squamseform, or it is even alto- 
gether absent. 
107. CYATHEA, Sm. 
Vernation fasciculate, erect, arborescent. Fronds bi-tripinna- 
tifid, 5-15 feet long ; pinnse and pinnules in some species articu- 
lated with the rachis. Veins forked ; venules free. Sori axillary ; 
receptacle columnar. Indusium complete calyciform, its margin 
entire or unequally laciniated. 
1. C. canaliculata, Willd. ; Hoolc. Sp. Fit. 1 . 11 B. — Mauritius. 
2. C. excelsa, Sw. ; Hook. Sp. Fit. t. 12 B. — Mauritius. 
3. C. arborea, Sm. Polypodium arboreum, Linn.; Blum. Fit. 
t. 1 et 2. Disphenia arborea, Brest. Cyathea elegans, 
Hew.; Hook. Gen. Fit. t. 23. — Jamaica. 
4. C. serra, Willd.; HooJc. Sp. Fil. t . 9 A. — West Indies and 
Martinique. 
5. C. medullaris, Sw. ; Schk. Fil. t. 133. Polypodium medul- 
lare, Forst. — New Zealand. 
6. C. aculeata, Willd. Disphenia aculeata, Brest. — West In- 
dies. 
7. C. dealbata, Sw. ; Rich. FI. Nov. Zeal. t. 10. — New Zealand. 
108. HEMITELIA, R. Br. 
(Cnemidaria, Brest.) 
Vernation fasciculate, erect, arborescent. Fronds bipinnatifid, 
4-8 feet long ; stipes smooth or aculeated. Veins simply or pin- 
nately forked ; venules all free, or the lower pair of the lowest 
fascicles angularly anastomosing, forming a costal arch. Sori 
medial. Indusium semicalyciform ; receptacle globose. 
