48 



OPHIOGLOSSACEAE (ADDEu's TONGUE FAMILY) 



distinct, rather coriaceous, not reticulated, globular, without a ring, and open- 

 ing transversely into two valves. Sterile segment of the frond ternately or 

 pinnately divided or compound ; veins all free. Spores copious, sulphur-color. 

 (Name a diminutive of fiSrpvs, a cluster of grapes, from the appearance of the 

 fructification.) 



§ 1. EUBOTRYCHIUM Milde. Base of the stalk (^containing the bud) completely 

 closed; sterile segment more or less fleshy ; the cells of the epidermis straight. 



* Sterile segment sessile or on a short petiole (less than I cm. long"). 



1. B. Lun&ria (L.) Sw. Very fleshy (8-18 cm. high) ; sterile segment sub- 

 sessile, borne near the middle of the plant, oblong, simply pinnate with 5-15 

 lunate or fan-shaped very obtuse crenate, incised, or nearly entire, 

 fleshy divisions, more or less excised at the base on the lower or 

 on both sides, the veins radiating from the base and repeatedly 

 forlcing ; fertile segment panicled, 2-3-pinnate. — Open places, 

 e. Que. to Vt., n. O., L. Superior, and northw. ; rare. (Widely 

 distr.) Fig. 1. Also on wooded cliffs near Syracuse, N.T., where 

 tending to a more slender form with decidedly stipitate sterile 

 segment and subremote more narrowly cuneate 

 pinnae (B. onundagense Underw.). 



2. B. simplex E. Hitchcock. Fronds small 

 (5-10, or rarely 25 cm. high) ; sterile segment 

 short-petioled from near base, middle, or sum- 

 mit of the stalk, thiokish, simple, and roundish, 

 or pinnately 3-7-lobed; the lobes roundish- 

 obovate, nearly entire, decurrent on the broad 

 and flat indeterminate rhachis, the terminal 

 one usually emargiiiate ; the veins all forking 

 from the base; fertile segment simple or 1-2- 

 pmnate. (B. tenebrosum A. A. Eaton.) — N. S. 

 to Md., Ont., Minn., and Rocky Mts. ; rare. 

 (Eu.) Fig. 2. Var. comp6situm Lasch. Sterile 

 segment binate or ternate ; the divisions pin- 

 natifid. — Occurring with and clearly passing into the typical form. 



3. B. lanceolltum (Gmel.) Angstroem, var. angus- 

 tisegm^ntum Pease & Moore. Fronds small (1-2.5 

 dm. high) ; the sterile segment closely sessile at the 

 top of the long and slender stalk, scarcely fleshy, 



triangular, ternately twice pinnatifid; the acute lobes lanceolate, 



incised or toothed; veinlets forking from a continuous midvein; 



fertile part 2-3-pinnate. — N. S. to N. J., 0., and L. Superior. 

 July, Aug. Fig. 8. The typical European 

 form has the segments of the stetile frond 

 broader and more approximate. 



4. B. rarabsum (Roth) Aschers. Fronds 

 small (1-2.5 dm. high) ; the sterile segment 

 nearly sessile at the top of the long and 

 slender common stalk, moderately fleshy, 

 ovate or triangular, varying from pinnate to 

 bipinnatifld ; the lobes oblong-ovate and 

 obtuse; midvein dissipated into forking 

 veinlets ; fertile part 2-3-pinnate. (B. ma- 

 tricariaefolium A. Br. ; B. negleetum Wood.) 



8. B. lanc'v. ang. x%. —Rich soil, e. Que to Md., and westw. 

 " June, July. (Eurasia.) Fig. 4 



* * The sterile segment on a long petiole (2-13 tm. in length). 



V 6. B. obliquum Muhl. Subcoriaceous (1-4 dm. high), sparsely 



hairy or glabrous : sterile segment long-petioled, springing from 4 j. „„. 



near the base ot the plant, broadly triangular or somewhat pen- ^ um' x '' 



1. B. Lunaria. 



