Clark : Hepaticae from the state of Wash 



portions of the lobes are especially distinct in the new variety and 

 form a more or less continuous hne along the postical aspect of 

 the stem. They agree in this respect with the variety vogesiaca 

 C. Miill. Frib,, a golden-green form with exceedingly minute 

 verruculae, known only from the Vosges Mountains in Alsace- 

 Lorraine, The typical form of the species, which is also green, 

 has been collected in several localities in New England, where it 

 seems to prefer the edges of small pools in bogs at rather high 

 altitudes. The Washington specimens mark a wide extension of 

 the known range of the species in North America, and it is also 

 widely distributed in Europe, 



Botanical Laboratory, 



Sheffield Scientific School, 

 Yale University. 



H^tplanatlon of plate 20 



l-li. Jungermannia Alhrni'L, Clark 



I. Part of stem, postical view, X ^S- 2, Part of stem, antical view, X ^5- 3* 

 Part of stem with two branches, postical view, X ^5- 4* Leaf, X 1 5- 5» 6. Under- 

 leaves, X ^4'^' 7- Cells from margin of leaf, X 240. 8. Underleaf, X 24O- 9, 10, 

 Underleaves, showing papillae, X ^4^* ^^' Cells from middle of leaf, X240. The 

 figures were drawn from the type specimen. 



12-17. Scapania paludosa papulosa C. Miill. Frib. 



12. Part of stem, antical view, X ^S' ^3- ^^^^ ^f stem, postical view, X ^5- 

 14. Leaf, antical view, X 34- ^5- Leaf, postical view, X 34- J^. Cells from 

 margin of leaf, X 240. 17- Cells from middle of lobe, showing papillae, X 240. The 

 figures were all drawn from the type specimen. 



