Anuuiratt Mtm Journal 



Vol. 4 APRIL-JUNE, 1914 No. 2 



The Ferns of Washington 



T. C. FKYK AND MABEL McMURRY JACKSON 



(Concluded from Amf.kican Fbrn Jovkxal, Vol. 4, No, 1, page 



13. January-March 1914.) 



6. ATHYRIUM. 



Plants tall. Leaves herbaceous; petioles green or 

 greenish, not filiform, the bundles concentric and unit- 

 ing above into a 3-4-armed central bundle; scales deli- 

 cate, of thin-walled cells. (Greek a- not, %rew«a 



largr oblong shield; apparently referring to the indus- 

 ium.) We have only the following speeies. 



1. Athyiuim ( rcLosoBUU Rupr. (Plato 15. Plate 10, 



f- 1 , 2. 



8 trump Fern. 



Leaves 1 -6 feet high, tufted; petiole short, stout; blade 

 narrow at base, thin and delicate when growing in shade 

 DU1 coarser when in sun. narrowly ovate, acute. 2 = pin- 

 nate; leaflets divided nearly to mid-vein, the margin 

 serrate. Sori small, curved, forming more or less of a 

 complete circle, on free veins, about half-way between 

 niid-vein and margin; indusium membranous, opening 

 along outer margin.— Alaska to Nebraska and Oregon. 



7. ASPLENIUM. Splf.kn-wokt. 



Plant small. Leaves evergreen, 1 -pinnate; blade 



linear; leaflets regular in size except at very tip, oval or 

 ovate; veins fr- ; petiole filiform, the bundles cither 



I No. l of the Journal (4: 1-40) was issued Mar. SO, 1914 



41 



