DA VALLIA. 



133 



Gin. long and Jin. broad, on very short stalks. The largest leaflets are deltoid 

 (in shape of the Greek delta, A), Jin. long, more than Jin. broad, and cut 

 down into simple or forked segments, each bearing at its summit a sohtary 

 nearly round sorus (spore mass). — Hooker, Species Filicum, i., p. 189, t. 50c. 



D. (Eudavallia) Griffithiana— Eu-dav-ar-li-a ; Grif-fith-i-a'-na (Griffith's), 

 Hooker. 



This handsome species, which may be grown with equal success in either 

 stove or greenhouse, is a native of Khasya, Assam, and Bhotan, also of the 

 Malayan Peninsula and China. Its fronds, 9in. to 12in. long, 4in. to 

 Sin. broad, and borne on erect, wiry 

 stalks 4in. to Gin. long, are pro- 

 duced from stout, creej)ing rhizomes 

 (prostrate stems), that are densely 

 clothed with narrow, pale brown or 

 whitish scales. They are of a leathery 

 texture and three or four times pin- 

 natifid (cleft nearly to the midrib), 

 with their lower segments toothed 

 on the barren fronds, but cut down 

 nearly to the rachis (stalk of the 

 leafy portion) in the fertile ones. 

 Their sori (spore masses) are very 

 large, cup-shaped, and disposed on 



the margins of the segments, with strong teeth projecting beyond them. — 

 Hooker, Species Filicum, i., p. 168, t. 49b. Nicholson, Dictionary of Gardeniiig, 

 i,, p. 446. Beddome, Ferns of British India, t. 106. 



D. hemiptera — he-mip'-ter-a (half- winged). Synonymous with D. repens. 



D. (Humata) heterophylla — Hum-a'-ta ; het-er-oph-yr-la (variable- 

 leaved). Smith. 



This very singular and pretty, stove species, is a native of the Malayan 

 Peninsula and the Polynesian Islands. It and I), angustata are the only 

 known DavalHas with entire fronds. The fronds of D. heterophylla are pro- 

 duced from a small, creeping, scaly rhizome (prostrate stem) ; they are 



Fi^. 30. Davallia heterophylla 

 (J nat. size). 



