Ferxs of British India and Ceylon. 35 



X, W, Himalayas ; Gangotee, near the source of the Ganges. 

 Under Srikanta. 12,000-13,000 feet alt. At Ralam glacier, 

 Kumaon, 12,000-13,000 feet alt. {Dr. Duthie.) Very similar 

 in cutting to Lastrea Brunoniana, in which bundle they were 

 first detected at Kew by Mr. Hope. 



9. Athyrium gymnogrammoides, var. erythrorachis. 

 Dr. Trimen considers this a distinct species. 



10. Athyrium Filix-fce.mina. 



Var. dentigerum. Rootstock erect or sub-erect ; fronds very 

 large, gradually reduced towards the base, often 1 foot broad at 

 the centre, bipinnate-tripinnatifad, or from the presence of a wing 

 joining the pinnules only bipinnatifid. 



Var. pectinatum. Omit this as a variety ; it is described 

 below as a species. 



Var. attenuatum. Rootstock erect or sub-repent ; stipes 

 numerous, tufted ; fronds narrow lanceolate or linear, gradually 

 reduced below, 8-16 inches long by 1J-3 inches broad at the 

 centre, pinnate with the pinnae pinnatifid, or in rare cases sub- 

 bipinnate. 



I refer here parasnathensis (Clarke) and all the 1 -pinnate 

 forms with small, rather narrow fronds gradually reduced towards 

 the base, some of the larger forms run deltigerum very close, and 

 I suspect it quite graduates into that variety. Clarke's retusa 

 var. elongata belongs here. 



Var. retusa. Rootstock sub-erect or decumbent ; stipes 

 tufted; fronds very similar to those of Schimperi, but almost 

 always only bipinnatifid, the pinnules being connected by a 

 conspicuous wing, generally subdeltoid-lanceolate, the lower 

 pin mo being rarely attenuated. I refer here, rupicola (Edgc- 

 worth) — retusa var. rubricaulis (Clarke), retusa var. hemi- 

 diplazium {Clarke) — it generally grows in rocky crevices. 



