[Vol. 9 

 132 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



S. Nat. Herb.) ; springs and meadows, W. Klickitat Co., May 

 and September, 1886, Suksdorf (N. Y. Bot. Card. Herb.) ; 

 meadows and springy places, Columbia River, 12 March and 

 September, 1886, Suksdorf 917 (Mo. Bot. Gard. Herb, and 

 U. S. Nat. Herb.) ; on damp ground, Falcon Valley, 16 June, 

 1890, Suksdorf 2373 (Mo. Bot. Gard. Herb.) ; springy places 

 near Bingen, W. Klickitat Co., 5 June, 1894, Suksdorf 917 

 (Mo. Bot. Gard. Herb.); wet ground on mountain slopes 

 near the Columbia River, W. Klickitat Co., 3 August, 1894, 

 Suksdorf 2364- (Mo. Bot. Gard. Herb.) ; on meadows, Falcon 

 Valley, Klickitat Co., 17 July, 1896 ; Suksdorf 2614 (Mo. 

 Bot. Gard. Herb.) ; on low damp ground, Falcon Valley, 

 W. Klickitat Co., 24 June, 1897, Suksdorf 2615 (Mo. Bot. 

 Gard. Herb.); on wet ground near Bingen, 14 April, 1904, 

 Suksdorf 4443 (Mo. Bot. Gard. Herb.). 



Vancouver Island: Nanaimo, 13 July, 1887, John Macoun 14219a, 

 14219c (Gray Herb.) ; vicinity of Nanaimo, 3 July, 1908, 

 John Macoun 86378 (Gray Herb, and N. Y. Bot. Gard. 

 Herb.); Nanaimo, John Macoun (Mo. Bot. Gard. Herb.) ; 

 vicinity of Victoria, 10 June, 1893, John Macoun 533 (Gray 

 Herb.). 



The peripheral strands are usually three in number at the 

 angles of the 3-side^ stem; of these three, the dorsal are the 

 weakest, and in some cases, fail to appear. There is variation 

 as to persistence of bases of leaves. Many specimens show dark 

 brown horny bases (as long as the sporangium) surmounted by 

 three minute teeth, of which the central is slightly longer than 

 th'-i lateral ones. There is variation in the megaspore character in 

 that, though most are rather evidently marked, some are almost 

 smooth. 



27. I. Orcuttii Eaton, Fern Bull. 8: 13. 1900. 



/. Nuttallii var. Orcuttii Clute, Fern Allies, 253. 1905. 



Corm slightly 3-lobed; leaves 6-14 (or even 20), 2-6.5, rarely 

 10, cm. long, fine, erect, triangular, with narrow membranaceous 

 margin only at base; stomata present; peripheral strands none 

 or 2, weakly developed ; ligule triangular ; sporangia orbicular to 

 slightly elongated, 2-5 mm. long, completely covered by velum; 

 megaspores gray at maturity, brownish when wet, 216-360 p, 

 rarely 480 n, in diameter, closely marked with numerous small 



