— n8— 



9. Botrychium ternatum obliquum (Muhl.). Common 

 Grape-fern. Common; in moist woods and 

 thickets nearly throughout America. Our plant, 

 though closely resembling the Japanese B. ter- 

 natum (Thunb.), is not considered identical with 

 it. — B. obliquum Muhl. 



The form Coulteri is from the Rocky Mountain 

 region (B. Coulteri Underw.); L dissectum is a 

 dissected form occurring with the common form 

 (B. dissectum Spreng.) ; f. intermedium is found 

 in Indiana, New York and New England (B. 

 ternatum inter mediinnD. C. Eaton) ; f, matricariae 

 is reported from New York and New England, 

 northward (B. matricarice Schrank) ; f. Oneidense 

 is a small, less divided form found with the type 

 [B. Oneidense Gilbert) ; L robustum is from 

 Unalaska (B. rutcefolium robustum Rupr.); f. 

 silaifolium is a form from the West Coast (B. 

 Calif ornicum Underw. ; B. occidentale Underw. ; 

 B. ternatum australe D. C. Eaton; B. obliquum 

 Habereri Gilbert) ; f. tenuifolium is a slender 

 form from the Gulf States (B. tenui folium 

 Underw.). 



10. Botrychium Virginianum (L.). Rattle - snake 



Fern. Common; in moist shades nearly 

 throughout North America; also in the West 

 Indies, Europe and Asia. Very small forms 

 found with the type have been named gracile (B. 

 gracile Pursh) ; the form from Jamaica in which 

 the sterile portion of the frond lasts through the 

 winter has been named B. dichronum Underw. 

 Ophioglossum L. 



11. Ophioglossum Californicum Prantl. Rare. South- 



ern California. 



12. Ophioglossum crotalophoroides Walt. Rare. South 



Carolina and Florida to Texas; also in South 

 America. — O. bulbosum Michx. 



