38 



Ophioglossaceae 



Botrychium 



50 



Map 2 



Botrychium simplex E.Hitchcock 



35 



Map 3 



Botrychium multifidum 

 var silaifolium (Presl) Brown 



2. Ophioglossum Engelmanni Prantl. There is a fragmentary specimen 

 in the herbarium of the New York Botanical Garden which R. T. Clausen 

 has seen and reported in the Mem. Torrey Club 19: no. 2:140. 1938 as be- 

 longing to this species. Clausen in a letter to me dated June 1, 1938, con- 

 firms his examination of the specimen and determination. The specimen 

 was collected by L. M. Underwood in June, 1893, on the campus of Indiana 

 University. 



Nw. Va., s. Ohio and 111. to Mo., southw. to cent. Fla., La., Tex., and Ariz. ; 

 cent, and s. Mex. 



2. BOTRYCHIUM Sw. Grapefern 



Fronds small, mostly 1-3 cm long, simple and roundish or pinnately 3-7-lobed 



1. B. simplex. 



Tronds larger, more than 3 cm long, ternate. 



Fronds on long petioles (arising from near the base of the stem), bipinnate- 

 pinnatifid. 

 Sterile frond with all the segments of about the same size and shape; segments 



ovate or obovate, the terminal ones not elongate 



2. B. multifidum var. silaifolium. 



Sterile fronds with segments of different size and shape. 



Ultimate divisions of the frond cut into linear segments; segments more or less 



notched at the apex 3. B. dissectum. 



Ultimate divisions of the frond not dissected but variously and unevenly cut. 

 Divisions of the pinnae oblong-ovate to oblong-lanceolate, more or less acute. 



Segments of frond many more than 9 3a. B. dissectum var. obliquum. 



Segments usually about 9 3b. B. dissectum var. tenuifolium. 



Divisions of the pinnae broadly ovate and obtuse 



3c. B. dissectum var. oneidense. 



Fronds sessile (arising from near or above the middle of the stem), the short- 

 stalked primary divisions once or twice pinnate and these in turn once or twice 

 pinnatifid 4. B. virginianum. 



1. Botrychium simplex E. Hitchcock. HITCHCOCK GRAPEFERN. Map 2. 

 I have seen specimens from three collections. The first was collected in 

 1910 by W. N. Clute along the Michigan Central Railroad near Glen Park, 

 Lake County. A second specimen was collected in 1929 by Marcus W. Lyon, 

 Jr., on the wooded border of an interdunal flat in Porter County. R. T. 



