P TERID OP II Y TA . 3 



yellowish after fruiting, transparent when dry; leaf above the middle of the stem, 

 often immediately under the sporophyll, short-petioled, entire, lobed, or usually 

 with 1-3 pairs of distant alternate lunate decurrent entire segments ; the apex 

 emarginate or with a triangular elongation ; sporophyll usually short-stalked, 

 simple, or rarely with one or two short, somewhat dilated branches, bearing alter- 

 nate or nearly opposite clusters of sporanges ; spores very large, verrucose ; sporo- 

 phyll not bent in vernation. Rich shady situations, usually among maples at the 

 border of swamps; Mass. and N. H. to Cent. N. Y. 



2. Botrychium Lunaria (L.) Sw. Moonwort. (I. F. f. 3.) Plant very 

 fleshy, 5-30 cm. high. Leaf usually sessile, borne at or above the middle of the 

 stem, pinnate with 2-8 pairs of lunate or fan-shaped lobes which vary from crenate 

 to entire and are either close and imbricated or somewhat distant ; sporophyll 

 2-3-pinnate, often dense, 3-5 cm. long, often about the height of the sterile ; apex 

 only of the leaf bent over the nearly straight sporophyll in vernation. Greenland 

 to Alaska, south to Conn., Cent. N. Y., Mich., Br. Col., and in the Rocky Mts. to 

 Colo., mostly in fields. Also in N. Europe and Asia. June-July. 



3. Botrychium neglectum A. Wood. (I. F. f. 4.) Plant 5-30 cm. high, often 

 very fleshy. Sterile portion borne above the middle of the stem, short-stalked, 

 ovate or oblong, 1-2-pinnatifid or rarely 2- pinnate, with obtuse divisions and nar- 

 row toothed segments; midveins disappearing by continued branching ; sporophyll 

 2-3-pinnate, often much branched ; spores tuberculate; apex of both leaf and 

 sporophyll turned downward in vernation. In grassy woods and swamps, N. S. to 

 Md,, west to O. and Wash. (B. matricaricefolium Dav., not A. Br.). May-Juns. 



4. Botrychium lanceolatum (S. G. Gmel.) Angs. (I. F. f. 6.) Plant 7-20 

 cm. high, somewhat fleshy. Leaf closely sessile near the summit of the stem, 

 2 cm. or more wide, 3-lobed or broadly triangular and 2-pinnatifid, the ultimate 

 segments lanceolate, acute, oblique, entire or dentate ; midvein continuous, with 

 forking veinlets ; sporophyll slightly overtopping the leaf, short-stalked, 2-3- 

 pinnate ; sporophyll recurved its whole length with the shorter leaf reclined upon 

 it in vernation. In meadows, woods, and swamps, N. S. to Alaska, south to N. J., 

 O., and in the Rocky Mts. to Colo. Also in Europe and Asia. June-July. 



5. Botrychium simplex E. Hitchcock. (I. F. f. 2.) Plant 5-16 cm. high, 

 slender, very variable. Leaf ovate, obovate, or oblong, entire, lobed, or pinnately 

 parted, borne near the base of the stem ; sporophyll a simple or slightly compound 

 spike, sometimes reduced to only a few sporanges ; spores large for the genus, 

 minutely tuberculate ; apex of leaf and sporophyll erect in vernation. In moist 

 woods or meadows, Pr. Edw. Isl. to Md., west to Wyo. and Cal. Also in N. 

 Europe. May-June. 



6. Botrychium obliquum Muhl. (I. F. f. 5, as B. ternatum.) Plant robust, 

 15 cm. -5 dm. high. Leaf rising from near the base on a stalk 2-10 cm. or more 

 long, ternate with the three divisions nearly equal, bipinnate or somewhat tri- 

 pinnatifid in larger forms, the ultimate segments obliquely ovate or oblong-lanceo- 

 late, the terminal of each division elongate, 1-2 cm. long, 5-8 mm. wide, the 

 margins crenate or serrate ; sporophyll long-stalked, triquadripinnate ; bud densely 

 pilose, both portions bent in vernation. Low woods and open places widely dis- 

 tributed from X. B. to Fla. and Mex. and westward to Minn. 



Botrychium obliquum intermedium (D. C. Eaton) Underw. Plant larger, the leaf 

 on a shorter stalk 2-5 cm. long, the leaf sometimes reaching 15 cm. each way ; lateral 

 divisions smaller than the terminal : ultimate segments similar to the type, but mostly 

 shorter. In low ground, N. N. Y. and N. E. 



7. Botrychium dissectum Spreng. (I. F. f. 5a.) Plant 5-10 dm. high with 

 slender fleshy stems. Leaf long-stalked from near the base of the stem, with 

 broadly deltoid basal divisions, decompound ; secondary pinnae lanceolate from a 

 broader base, pinnate with laciniate and deeply cut pinnules, the ultimate divisions 

 divergent, often 2-toothed at their apices, usually less than I mm. wide ; sporophyll 

 long-stalked 2-3 pinnate ; bud pilose, enclosed in the base of the stem, both por- 

 tions bent in vernation. Rare in E. Mass. and common from S. N. E. southward 

 to Ya., inland to Ind. and Ky. 



8. Botrychium matricariae (Schrank) Spreng. Plant 10-15 cm - high, with 

 slender fleshy stems. Leaf moderately short-stalked, ternate, small, 3-5 cm. wide 

 and high, the three divisions similar, bipinnatifid or bipinnate ; ultimate segments 



