a? eae en eee ey 


1917] nance Studies in Ferns — Botrychium 211 
4°. f }° 4 M4 be le. ry WR) As. let . éte i J 

confertis, segmentis frondis fertilis ultimis ‘angustis complanatis, 
sporangiis flavis ad 0.8 mm. longis. 
This variety occurs in Nova Scotia, New England and northern 
New York, and also in Illinois and Missouri. The following speci- 
mens, in the Gray Herbarium belong to this variety: 
Nova Scotra: hardwood forest, Indian Brook, valley of the Bar- 
rassis iets Cape Breton Island, July-August 1915, G. E. Nichols 
no. 156 
Main ome open springy meadows, Brownville, July 18, 1905, Knight 
and Parlin no. 1913. 
Vermont: Arlington, July 5, 1913, N. H. Blanchard no. 57. 
Massacuusetts: dry rocky ‘upland geet North Adams, June 25, 
1913, Fernald and Long no. 8374 (N. E.’). 
a rich woods, North Guilford, June 22, 1906, G. H. 
Bartlett 
New ‘York: moist woods, Canton, June 25, 1914, Orra P. Phelps no. 
47 (rvPE); Pierrepont, July 10, 1914, 0. P. Phelps no. 48; moist woods, 
Norfolk, July 7, 1914, 0. P. Phelps no. 50 (all in St. Lawrence ( ‘o.). 
ILurNots: rich woods, C. H. and D. bridge, Macon Co., May 21, 
1915, J. W. Clokey, no. 2387. 
Missouri: rich woods, Monteer, May 26, 1907, B. F. Bush no. 
4724: Whiteside, June 13, 1910, John Davis 
BoTrRYCHIUM VIRGINIANUM var. EUROPAEUM be eee is also some- 
what intermediate in —— but quite unlike the variety just dis- 
cussed. The fertile frond is less finely dissected a in — 
Botrychium virginianum, and Pex = alten te segments 
obtuse than in that plant, but they show little of the S ipatalate foci 
anceo- 
seen in var. laurentianum or var. ¢ ium. The pinnules are 
late, and tend to be strongly decurrent so that the pinnae are usually 
merely pinn atifid. The sporangia resemble those of Botrychium 
virginianum pores than those of either of the varieties just descri 
They are somewhat larger than in the typical form (0.7-1.2 mm. long), 
and i slightly lighter colored, but with a distinct dark stripe along the 
edge of the valves. Their dehiscence is wider than that of either of the 

ad thst seem ox ties: pots waciatien. pout dieciaaed 
cells with sinuous walls are alwa, oe eet eS aa: 
wa tat maak of thik wee oe ele of nearly regular quadri- 
lateral cells. 
Like the majority of lowland plants common to temperate Europe 
1 Herbarium of the New England Botanical Club. 
