veins indistinct; fertile spike linear- 2 (rarely 3) on a branching peduncle, 



cumulate, 6 'long-, peduncle very slen- scattered hairs when young; sporocarps 



ler. ua; Flar Cal. Synonyms: O. ellepti- which is com attached to the stipe near 



cum H & G. O. Californicum Prantl. * its base, but sometimes as much as 2 



; vl jlgatum nudicaule D. C. Eaton (all cm above; young sporocarp with short 



o r.F-?T^ od) - y'ish-brown hairs, later becoming naked 



u: CALirOBNICUM Prantl. and dark p; lower tooth obtuse, upper 



considered by Underwood as O. nudi- small, acute or obtuse; sori 8-9 in each 



ca j?ij t valve. Bantam Lake, Litchfield Co. Conn 



Plants small, only 2-6 cm hi; rtstalk (Dr. T. F. Allen). La (Dr. Hale), fide 



cylindrie, tuberous, elongated with num Wood. Cl-bk bot 810. 



large rts; lys % sheathed at base by the M: KACBOFODA Engelmann, Am J Sci, 



old ones of the previous year; petioles sr 2, 3: 56 (1847). 



entirely subterranean, 1-2 cm long; Plant robust, 10-25 cm hi; Ifts large. 



rile lamina 1-2 cm long; 0.4-0.7 mm 2-5 cm Ig, 2 cm wide or less, com undu- 



ae, lanceolate or ovate-acute, rarely late, clothed with w hairs on both sides 



btuse, or apiculate; fleshy, rugose when when young, becoming smoother with 



ary; basal veins 3, median the stronger, age; sporocarps 2-6, on erect branching 



lateral ones branched; transverse vein- peduncles, ascending, densely villous, 



?i, * que ' formin & long narrow areolae 6-8 mm Ig, 5-6 mm wide; raphe short, 



tew or no free veinlets near the lower tooth obtuse, upper inconspicuous 



margin; epidermis wrinkled, cells flex- or 0; sori 10 in each valve. Tex; NM. 



uous, stomata straight; peduncle arising Synonym: M. macropus A. Br. (fide Un- 



irom the base of the sterile lamina only cleiwood). 



a-15 mm long; spike 5-10 mm long; *< Sporocarps 1 (rarely 2) on each pe- 



sporangia 10-15 pairs, apex short; spores duncle. 



mm lg> reticulate, areolae 20-25 M: UNCIKATA A. Br. 



rounded, striae unequal, not elevated" _ Plant 6-20 cm hi; Ifts nearly smooth, 



Tt' Britton. Torr cl b 24:555 (SOD entire, 10-16 mm Ig; sporocarps 6 mm 



1897). near SD. wide, 8 mm Ig; peduncles 15-30 mm Ig, 



_... 2-4 times as long as sporocarps; raphe 



Other species credited to North Amer- long, terminating in 2 approximate teeth, 



lea north of Mexico are the following: upper longer and mostly uncinately cur- 



O: ALASKA NUM E G Britton ved ' sori ^1S-14 In each valve. La (Hale) 



: AMHAS1UM E. G. Britton. i^R^TvJ&ITA H. * O. 



O: ENGELMANNI Prantl. Plant 3-6 cm hi; Ifts entire or slightly 



Plants 8-22 cm hi; rtstalk clindric toothed; sporocarps 4-7 mm long, 3-5 mm 



with long, brown rts, oft bearing 2-3 wide; raphe short, lower tooth short and 



f r ng and 1 sterile If on the same plant blunt, upper acute, a little longer, some- 



with the sheathing base of the old Ivs times curved; paleae varying from soft, 



frequently persistent; petiole subter- dense and spreading to short and ap- 



ranean or partly exserted, 4-10 cm long; pressed, in mucronata forms, where It is 



sterile If elliptic or lanceolate-elliptic, sometimes 0; sori 6-11 in each valve; a 



obtuse but sharply apiculate, 3-9 cm IK very variable species. Ark; Ar; Tex; 



1-5-5 cm broad; fleshy, becoming pellu- Kans; Nev; Ore; Wash; Mont; Dak; SD. 



cid when old and dry, slightly paler be- Synonym: M. mucronata A. Br. 



neath; basal veins 13 or more, median M: TSXUXFOZiXA Engelmann. 



one slightly stronger and unbranched Plant somewhat slender, 5-15 cm hi; 



below the middle of the frond, forking Ifts 2-4 mm wide, more or less falcate. 



and anastomosing with the lateral ones apex often somewhat truncate and un- 



above; lateral inner veins parallel and equally toothed, villous with appressed 



approximate, outer ones arcuate-erect; hairs; sporocarps single, 5-8 mm long, 



transverse veinlets oblique and large* 4-5 mm wide, teeth divergent, subequal; 



forming broad oblong-hexagonal areas sori 9-11 in each valve. Texas. Syn- 



with num anastomosing or free veinlets on$m: M. vestita tenuifolia. Underwood 



included; cells of the epidermis flexuous. & Cook. 



much elongated in the middle beneath Grt HIIAJLAJRIA L.inneu. 



a^fculatl *2So!!& 8p i ! 5%f- 6 -*i 5 cm longr ' PILULARIA AMERICANA Al. Br. 



045 05 mm P ^n rtf^ 12 Q " 27 i Pair i S K : o S n p0res Lvs setiform, 1' long; sporocarps 1" 



Ark (Nuttall); SD! 



Order MABSIL1ACEAE R. Br. SAJ.VINIACEAI:. 



G*n* m MAR8ILIA U>e... ^J 1 ^ fon^with a distinct midrib. 



Sporocarps ovoid; Ivs quadifoliate. A Named for Salvini, a Florentine profes- 



genus of 40 or more species. sor. Contains 13 species. 



*Sporocarps 2-6 on each peduncle. S: NATANS Hoffm. 



M. QUADBIPOI.IA L. Lvs oblong, horizontal, rounded or 



Plant com slender, 5-12 cm hi; Ifts slightly cordate at base, %-!' long, 



variable, 4-14 mm wide, 5-15 mm long, bright g above, the under surface mat- 



margins entire, smooth, or rarely with ted with brown, pellucid hairs; sporo- 



