MICHIGAN ACADEMY OF SCIENCE. 87 



fronds on the same plant. Keweenaw Co., No. 708, Sept. 20, 1888, 

 common in grassy liekls and meadows; Rochester, No. 628 a, Aug. 

 15, 1909. 



BOTRYCHIUM MULTIFIDTJM Var. INTERMEDIUM (D. C. E.), N. CoUlb. 



Botrycliium ternatum subvar. intertnedmm D. C. E., Ferns, N. 

 Amer. 1, 149, Plate XX a (Plant in front), 1879. 



Intermediate between the species and the variety australe. Fields 

 and meadows, common, Keweenaw Co., No. 628, July 31, 1888. 



BoTRYCHiuM MULTiFiDUM var. DicH0T0MUM_, N. Var. 



Twice dichotomously branched showing two long, and 

 one short-stalked, fertile segments and one short-stalked 

 sterile lamina. The primary and secondary divisions of 

 the stem are about 1 cm. in length, while the terti- 

 ary divisions are of variable lengths. The sterile lamina is 

 small (15 mm. long by 10 mm. wide at the base), ovate, pinnati- 

 fied with 5-7 small, closely placed, semi-lunate to obvate, some- 

 what cuneate, obtuse lobes, entire or denticulate, on a stalk 1 cm. 

 long; the fertile segment is bipinnate on a stalk 25 mm. long; the 

 other two fertile segments are tripinnate on stalks about 10 cm. in 

 length. This curious plant (Fig. 13) was collected in sphagnum 

 moss and may be a monstrosity but seems to answer to the state 

 found by C. J. Sprague, at Hingham, Mass., as mentioned in Gray's 

 Manual, 5th Ed. p. 672. Apparently this differs from the Sprague 

 plant in having the long-stalked fertile segments, which repre- 

 sent the lateral divisions of the sterile lamina, arising from low 

 down on the common stalk instead of at the normal positions for 

 those divisions. Keweenaw Co., No. 627 a, July 31, 1888. 



Botrychium simplex, E. Hitch. 



This is a very small plant and in the field, easily overlooked. The 

 typical form has a small, sterile frond, simple, or three-lobed, 

 roundish, or obovate. It is usually found in low wet grounds 

 with, or in the vicinity of, moss. Keweenaw Co., No. 39971/^, July 

 3, 1915. 



Botrychium simplex var. angustum, Milde. 



Botrychium tenebt'osum A. A. Eaton, Fern BuL, 7, 8, 1899. 



This variety has a narrow, pinnafe, sterile frond with 2 or 3 

 pairs of distant lobes. It is more frequently found in rich, moist 

 thickets and is liable to be confused with slender and delicate 

 plants of B. Matricariaefolium with which it is sometimes found 

 in company. Keweenaw Co., No. 644 a, August 8, 1888. 



Botrychium simplex var. subcomposituin, Lasch. 



The sterile lamina is pinnate with 3-5 pairs of contiguous lobes, 



