174 



[Vol. 9 



GARDEN 



Stratford, plentiful locally in sandy gravel of tidal flats of 



Housatonic River, 29 September, 1911), Eames 9671 (Gray 

 Herb.). 



Plants described by Eaton as /. Gravesii have the appearance 

 of robust forms of /. Braunii, are similar in abundance of sto- 

 mata, and appear like immature specimens in spore markings. 

 In cases where mature spores have been found in the soil, they 

 prove to have the spines characteristic of /. Braunii, as well as 

 1 he size. This is true of the specimens reported above from Con- 



f which have been collected at about the same 



f 



There is one other possible position for this Connecticut ma- 

 terial, if the assumption that it is immature proves to be un- 

 founded. Young megaspores of the echinate group have very 

 much the appearance that all the spores of /. Eatoni Dodge 

 show. In habit, this stout form is enough like the latter to sug- 

 gest a possible connection in this direction. Experimental work 

 and collections through a longer interval of the fruiting season 

 should clear ud this doubtful form. 



42b. Var. maritima (Underw.) Pfeiffer, comb. nov. 



/. maritima Underw. Bot. Gaz. 13: 94. 1888. 



/. echinospora var. maritima Eaton, Fern Bull. 13: 52. 1905. 



/. Macouni Eaton, Fern Bull. 8: 12. 1900. 



Conn 2-lobed; leaves 7-15, 3-12 cm. long, green, chiefly slen- 

 der, with fine-pointed tips and rather wide membranaceous bor- 

 der at base; stomata numerous; peripheral strands lacking; li- 

 gule triangular, little longer than wide; sporangia globose to 

 oblong, 3-4 mm. long, w T ith velum usually narrow, sometimes 

 covering y 2 of sporangium; megaspores white, chiefly 380-500 m, 

 rarely 000 (j, in diameter, usually densely marked with stout 

 blunt spines, sometimes confluent into toothed ridges; micro- 

 spores 30 39 m long, chiefly papillose. 



Distribution: Atkah and Vancouver Islands, Washington. 



Specimens examined: 

 Aleutian Archipelago: pools in Atkah Isl., Behring Sea, 26 Aug- 



ust, 1891, Macoun 14227 (Mo. Bot. Gard. Herb, and Gray 



Herb.). 



Vancouver Island: Alberni, Barclay Sound, August, 1887, /. Ma- 

 coun (Mo. Bot. Gard. Herb.) ; Great Central Lake, 2 July, 





