(129) 



bciug sui">posed merely such as would naturally residt from a difference 

 in the circumstances of growth and situation. It may be readily known 

 from the normal state by the whorled ramuli being straight and only 

 once divided, and by the much larger articulations. 



EXPLANATION OF PLATE CXIL 



Fig. 1. — Griffithsia equisetifolia , natural size. 

 2.— Branchlet with tetrasporcs. 

 3. — Branchlet with favelhe. 

 4. — Ramulus from involucre. 

 5. — Tetraspore. 

 6. — Variety sinipUciJilam. All magnified. 



vut. 11. 



