Botrychium. 



4. B. matricarisefolium, A. Br. Plant 2' 

 — 12' high, usually fleshy ; sterile segment 

 placed above the middle, short-stalked or 

 sessile, ovate or oblong, pinnately parted 

 into ovate-oblong, obtuse, rounded, entire, 

 incised, pinnatifid, or pinnately parted seg- 

 ments, the narrow divisions linear; fertile 

 segment t — 3 pinnate, panicled, often very 

 much branched ; spores thickly covered with 

 large rounded warts. Apex of both seg- 

 ments turned down in vernation; sterile 

 segment clasping the fertile with its apex 

 overlapping the whole. (Fig. 31.) N. Eng. 

 and N. Y. II. 



^'^ Buds pilose ; sterile segments usually 

 lowg-stalked. 



5. B. ternatum, Swz. Frond fleshy, the 

 common stalk very short ; sterile segment 

 broadly pentagonal or triangular, ternate ; 

 the three primary divisions also stalked, as 

 broad as long, pinnately decompound ; ulti- 

 mate divisions varying from round-reniform 

 to triangular-lanceolate, entire or variously 

 toothed and incised ; fertile segment long- 

 stalked, hi — quadripinnate. Apex of both 

 segments bent down with a slight curve in- 

 ward hi vernation. (Fig. 32.) N. Eng., N. 

 Y., westward to Cal. and British Columbia, 

 and southward to Florida. III. 



Var. LUNARioiDES, Milde. Segments 

 , very small uniformly lunate ; plant smaller 

 than the typical form. S. C, Ala. III. 



Var. obliquum, Milde. Larger, 6' — 17' 

 high ; the fructification more compound ; 

 sterile segment with oblong or lanceolate 

 divisions, either obtuse or oblique at the 

 base, nearly entire, toothed or irregularly 

 pinnatifid. N. England to Wis. and south- 

 ward. III. 



Var. dissectum, Milde. Divisions of the 



Fig. 31. Vernation of 

 }i TtiatricaricSfolium, A. 

 Br. (After Davenport.) 



sterile segment compoundly and laciniately Davenport.) 



Fig. 32. Vernation of B. 

 ternatum, Swz. (After 



