Part 1, 1909] OPHIOGLOSSACEAE 7 
commonstalk short, hypogean ; lamina with a stalk 2-13 cm. long, ovate-deltoid to broadly 
pentagonal, acuminate, 2.5-14 cm. long, 3.5-18 cm. broad, pinnately or subternately divided 
two to nearly four times, the primary divisions lanceolate or oblong-lanceolate to deltoid, 
decurrent, sessile or stalked, acute or acuminate, the secondary divisions mostly lanceolate, 
the penultimate divisions mostly lanceolate, pinnately divided in the lower half or two- 
thirds into obliquely lunulate to ovate or ovate-lanceolate, sessile or stalked, lateral seg- 
ments, and terminating in elongate, lanceolate or oblong-lanceolate tips, the margins of 
the segments finely crenulate or serrulate; sporophyl 6-45 cm. long, the stalk 4-33 cm. 
long, the panicle lax or rather compact, 3 or 4 times divided. 
TYPE LOCALITY: Pennsylvania. 
I DISTRIBUTION: New Hampshire to Wisconsin, south to Georgia and Arkansas; also in 
amaica. 
ILLUSTRATIONS: D. C. Eaton, Ferns N. Am. £/. 20, f.2, 10; Britt. & Brown, Ill. Fl. fi 5 (as 
B. ternatum). 
11. Botrychium dissectum Spreng. Anleit. 3: 172. 1804. 
Sceptridium dissectum Lyon, Bot. Gaz. 40: 457. 1905. 
Plant 10-50 cm. high; bud hairy, entirely enclosed ; commonstalk hypogean, 0.6-6 
cm. long; lamina with a stalk 2.5-12.5 cm. long, broadly deltoid, 2.3-18 cm. long, 3-20 cm. 
broad, pinnately or subternately divided, the primary divisions lanceolate to deltoid, the 
lower stalked, the margins of the segments more or less lacerate into narrowly oblong to 
linear, often forked teeth ; sporophyl 9-45 cm. long, with a stalk 7-30 cm. long, the panicle 
lax, 3 or 4 times divided. 
TYPE LOCALITY: Virginia. 
DISTRIBUTION : New England to Indiana, south to Kentucky and Virginia. 
ILLUSTRATION: D. C. Eaton, Ferns N. Am. p/. 20, f 1, 9. 
12. Botrychium silaifolium Presl, Rel. Haenk. 1: 76. 1825. 
Botrychium rutaefolium robustum Rupr.; Milde, Nova Acta Acad. Leop.-Carol. 26: 763. 1858. 
Botrychium occidentale Underw. Bull. Torrey Club 25: 538. 1898. 
Botrychium obliqguum intermedium Underw. Our Nat. Ferns ed. 6. 72. 1900. 
Botrychium robustum Underw. Bull. Torrey Club 30: 51. 1903. 
Sceptridium silaifolium Lyon, Bot. Gaz. 40: 458. 1905. 
Sceptridium robustum Lyon, Bot. Gaz. 40: 458. 1905. 
Plant 10-50 cm. high, rather stout, strict; bud hairy, entirely enclosed; common- 
stalk short, hypogean ; lamina with a stalk 3-15 cm. long, broadly deltoid to pentagonal, 
acute or obtuse, 5-20 cm. long, 7-30 cm. broad, 3-4 times pinnately or subternately divided, 
the primary divisions oblong or oblong-lanceolate to deltoid or pentagonal, the penultimate 
divisions oblong-lanceolate, pinnately divided into 2-5 pairs of oblique, oblong, narrowly 
elliptic or sometimes ovate, decurrent, lateral segments, and broader, rhomboid tips, the 
margins of the segments crenulate; sporophyl 8-45 cm. long, the panicle diffuse; spores 
maturing from July to September. 
TYPE LOCALITY : Nootka Sound, British Columbia. 
DISTRIBUTION: Maine and New York to Wisconsin, west to Alaska and northern California. 
ILLUSTRATION: D. C. Eaton, Ferns N. Am. £/. 20a (anterior and middle figures). 
13. Botrychium decompositum Mart. & Gal. Mém. Acad. 
Brux. IT. 15°: 15. 1842. 
Scepiridium decompositum Lyon, Bot. Gaz. 40: 457. 1905. 
Plant 32-50 cm. high or more, slender, strict; bud hairy, entirely enclosed ; common- 
stalk rather short, hypogean ; lamina with a stalk 6.5-19 cm. long, deltoid or pentagonal, 
7-19 cm. long, 7-23 cm. broad, 3-4 times pinnately or subternately divided, the primary 
divisions lanceolate to deltoid, the penultimate divisions lanceolate, pinnately divided into 
2-6 pairs of oblique, lanceolate to ovate-lanceolate or sometimes ovate, lateral segments, 
and a similarly shaped tip, the margins of the segments distinctly sharply serrulate ; 
sporophyl 25-45 cm. high, the panicle diffuse ; spores maturing from August to September. 
TYPE LOCALITY: Mexico. 
DISTRIBUTION : Mexico and Guatemala. 
ILLUSTRATION: Mart. & Gal. doc. cit. pl. 1. 
