320 



MANUAL OF POISONOUS PLANTS 



Fig. 123. Shield Fern (Aspidium marignale). 

 Said to contain filicic acid. Known to be poisonous. 

 (Ada Hayden). 



Indusium delicate arched or level-like, attached by a broad base on the inner, 

 partly under the sorus, opening free at the other side; veins free. A small 

 genus of 5 species, 2 common in the United States. C. bulbifera, long slender 

 fronds bearing bulblets which propagate the plant. C. fragilis, with brittle 

 stalk, the pinnae and pinnules ovate, lanceolate, irregularty pinnatifid or cut- 

 toothed. 



Onoclea. L. Sensitive Fern 



Coarse ferns, creeping root stocks, fertile fronds erect, rigid with con- 

 tracted pod-like or berry-like divisions, rolled up; sori roundish, imperfectly 

 covered by a very delicate hood-shaped indusium attached to the base of the 

 receptacle; when dry opening, allowing the spores to escape; sterile fronds 

 foliaceous. A small genus of a few species. 



Onoclea sensibilis. L,. Sensitive Fern 



Slender root stock with scattered fronds, sterile long stalked 2-lS inches 

 high, triangular ovate, fertile fronds, contracted closely, bipinnate, pinnules 

 rolled up into berry-like bodies. 



