272 TEENS : BRITISH AND FOREIGN. 



3. O. VTilgatum, Linn.; SchTc. Fil. i. 153; Honh. Gen. Fil. 



t. 59 B ; Bng. Bot. t. 108 ; lAndl. and Moore's Brit. 

 Ferns, t. 51 B ; Hook. Brit. Ferns, t. 46 ; Sowerhy's 

 Ferns, t. 46. -7- Temperate Zone of the Northern 

 Hemisphere. 



4. O. retieulatum, Linn. ; Hook, et Gr&v. Ic. Fil. t. 20 {Phmi. 



Fil. t. 164).— Tropics. 



** Fronds pendulous; the sterile segments ribhon-formed, 

 usually dichotomousVy branched (Epiphytal). (Ophioderma.) 



5. O. pendulmn, Linn. ; Hook, et Grev. Ic. Fil. t. 19 ; Hook. 



Oa/rd. Ferns, t. 33. — Tropics of Eastern Hemisphere. 



6. O. furcatum,/. Sm. Ophioglossum pendiilum ; /3 furcatum, 



Presl, Tent. Pterid. 8upp. p. 56; — Queensland. 



*** Fronds palmate, pendulous. (Cheiroglossa.) 



7. O. palmatum, Lvnn. (Plmn. Fil. 1. 163) ; Hook. Ic. PI. t. 4. 



— West Indies, New Granada, Peru, Brazil, Mauritius. 



156. HELMINTHOSTACHYS, Kaulf. 



Fronds erect, with dissimilar sterile and fertile segments. 

 Btefrile segments foliaceous, digita.te, pedate. Veins forked ; 



GenHS 156, — Portinn of sterile pinna, natorai size j ditto enlarged} 

 fertile spikt, natural size. No. 1. 



