ADDER'S TONGUE FAMILY 1039 



SporDphyll and sterile leaf-blade with the apex or upper part betit down in the bud 

 Sterile leaf-blade sessile or subsessile, once pimiately divided, the segments 



lunulate or fan-shaped. 2. B. Lunaria 



Sterile leaf-blade usually stalked, entire to twice pinnately divided, theseg- 

 ments mostly oblong or ovate. 3. B. neglectum. 



Sporophyll and sterile leaf-blade completely bent down in the bud; sterile leaf-blade 



T7 ^ ^ K^li^A^-- 4. B. lanceolatum. 



Frond-bud hairy. 



Common stalk open along one side at base, usually long ; sterile leaf-blade sessile. 



^ ^ „ , ^ ^ , , , 5. B. mrginianum. 



Common stalk completely closed at base, usually short; sterile leaf-blade stalked 



Sterile leaf-stalk 1-4 cm. long; plant very stout and fleshy, 6. B. Coulteri. 



Sterile leaf-stalk usually 5 cm. long or more; plant not so fleshy, often slender. 



7. B. silaifolium, 



1. B. simplex Hitchc. Frond 3.5-20 cm. long; common stalk usually short; 

 sterile leaf-blade with a stalk 0.2-0.5 cm. long, oblong or deltoid or deltoid-ovate, 

 rounded, entire to twice pinnately or sometimes subternately subdivided; seg- 

 ments cuneiform or fan-shaped or rarely lunulate, rounded at apex; sporophyll 

 usually long-stalked. In grassy places and open woods: ''N.S." — Me. — "Md."^ 

 Wis.— Ont.; ''Sask."—(?)^^Alta."— Mont.— Colo.— Utah; Eu. Siibrnoni.—MonL 



2. B. Lunaria (L.) Sw. Frond 3-28 cm. long; sterile leaf-blade with the 

 apex bent down and clasping the sporophyll in the bud, oblong or rarely ovate 

 or deltoid-ovate, rounded above, once pinnately divided; segments fan^haped 

 or hmulate or reniform, often imbricate, entire, or rarely radially incised or cleft 

 into cuneiform lobes; sporophyll with the apex bent do^vn in the bud, 1-3 times 

 divided. Woods and grassy places: Greenl.— P.E.I.—" Vt.''^N.Y.—n Ohio-- 

 Mont.— Colo.— Utah—B.C.-Alaska; Calif., Old World. Mont,—Suhmont, 

 The var. onondagense {B. onondagense Underw.), which is distinguished by its 

 rather distant fan-shaped segments, is the form usually occurring in the United 

 States. 



4 

 J 



3. B. neglectum Wood. Frond 5.5-32 cm. long; common stalk usuallv 

 long; sterile leaf with the upper part bent dovvTi in the bud, with a stalk 0.2-1.7 

 cm. long, oblong or sometimes deltoid, subacute, the primary divisions oblong 

 or ovate, the segments usually oblong, rounded at apex, entire or incised; sporo- 

 phyll with the upper part bent down in the bud, commonly diffusely branched 

 Wooded places: Que.— Md.—^^ Ohio ''—Wis.; (Black Hills) S,D.; Colo.; '*B.C.''; 

 Eu. Mont, 



4. B. lanceolatum (S. G. Gmel.) Angstr. Frond 5-30 cm. long; common 

 stalk long; sterile leaf-blade broadly deltoid, acute, 1-2 times pinnately or sub- 

 ternately divided, the primary divisions oblong to ovate or oblong-lanceolate, 

 the segments ovate, ovate-lanceolate or suboval, entire or incised; stalk of sporo- 

 phyll mostly shorter than the rather diffuse panicle; sporangia large, crowded, 

 sessile or broadly short-pedicelled. Woods and damp hillsides: Alaska^'' B C " 

 — Wash.— Wyo.; ^^Greenl."; Old World. 



5. B. virginianum (L.) Sw. Frond 6.5-60 cm. long; sterile leaf-blade thin, 

 3-5 times divided, broadly deltoid, the subdivisions next to the last narrowly 

 oblong or lanceolate to ovate or deltoid, pinnately divided, the segments oblong, 

 blunt, incised; sporophyll mostly long-stalked. Wooded places: Que. — Fla.-^ 

 Tex.— Colo.— Ore.— B.C.; trop. Am. and the Old World. Plain— Mont, 



6. B. Coulteri Underw. Frond 12-26 cm. long; sterile leaf-blade broadly 

 deltoid to pentagonal, obtuse, about 4 times pinnately or subternately divided, 

 the primary divisions crowded and imbricate, oblong to deltoid, the subdivisions 

 next to the last oblong, pinnately divided into 2-5 pairs of oblique, broadly oblong 

 or ovate, mostly acute or subacute lateral segments, and with ovate to rhom- 

 boid subacute tips, the segments entire or undulate; panicle of the sporophyll 

 short and compact. Very close to the next and possibly only a form of it. Mostly 

 geyser formations: Ore. — Mont. — Wyo. Mont, 



7. B. silaifolium Presl. Frond 9.5-60 cm. long; sterile leaf-blade broadly 

 deltoid to pentagonal, acute or obtuse, 3-4 times pinnately or subternately di- 

 vided, the primary divisions oblong or oblong-lanceolate to deltoid or pentagonal, 

 the subdivisions next to the last oblong-lanceolate, pinnately divided into 2-5 

 pairs of oblique, oblong, narrowly elliptic, or sometimes ovate, decurrent lateral 



