1007 



short point, both sparingly ciliate at 

 base; spikes 6-12" long, quadrangular, 

 terminal; bracts deltoid-cuspidate, 

 strongly imbricate. Cal; BC. Synonyms: 

 Lycopodium Douglasii H & G. L. ovali- 

 folium H & G. 



II. Sts mostly ann, fugacious; Ivs 

 mostly membranous, flaccid. 

 8: APUS Spring. 



Sts 1-4' long, slender, angled on face, 

 prostrate, creeping, much branched flac- 

 cid; Ivs of lower plane spreading above, 

 lower reflexed, ovate, acute, serrulate, 

 not distinctly ciliate; Ivs of upper plane 

 ovate, shortly cuspidate; spikes 3-6" Ig; 

 bracts ovate, acute, membranous, strong- 

 ly serrulate, acutely keeled in upper half. 

 Canada; Rocky Mts; Fla; Texas. 

 S: LUDOVICIANA A. Br. 



Sts slender, copiously pinnate, flat on 

 both sides, 4-6' long, lower branches 

 slightly compound; Ivs of lower plane 

 rather distant except at tips of branches, 

 spreading, ovate-oblong, subacute, firmer 

 in texture than in S. apus, serrulate, not 

 distinctly ciliate; Ivs of upper plane % 

 as long, obliquely oblong, cuspidate; 

 spikes 3-6" long; bracts ovate-lanceolate, 

 strongly keeled. La; Fla. Synonym: S. 

 apus denticulata Spring. 

 **Sts densely tufted, rolling into a nest- 

 like ball when dry; sts confined to base 



S. LEPIDOPHYLIiA Spring. Baja. Ar. 

 B 2:350. 



Sts 2-4' long, densely tufted, pinnately 

 branched to base, pinnae ascending, sub- 

 flabellately compound; Ivs of lower plane 

 closely imbricate, ascending, obliquely 

 ovate, obtuse, thick, rigid, minutely ci- 

 liate, g above, paler below, becoming 

 r'ish-brown in age; Ivs of upper plane 

 nearly as long, obliquely ovate, obtuse; 

 spikes 3-6" long, quadrangular; bracts 

 deltoid, acutely keeled. Tex; Arizona; 

 Cal? 

 S: FILIFERA A. Braun. 



Primary branching varies from fla- 

 bellate to pinnate, Ivs cuspidate and ser- 

 rulate. Mexico; Texas? 



Descriptions of the following have not 

 been seen by the writer. 



S: AE NICOLA Underwood. 



S: BP,YOIDES (Nuttall) Underwood. 



Synonym: S. cinerascens A. A. Eaton. 

 S: MUTICA D. C. Eaton. 

 S: FniNGLEI Baker. 

 S: RUPIN COLA Underwood. 

 S: S'IRUTEIOLOIDES (Presl) Under- 

 wood. 

 S: TORTIPILA A. Br. 



Order FILICES Juss. 



A large order of 70 to more than 200 

 genera (according to different botanists), 

 and 3000 or more species. It contains six 

 well-marked sub-orders (considered as 

 orders by some recent authors). 



Sub-order OSMUNDACEAE R. Br. 



Sporangia naked, globose, mostly pe- 

 dicelled, with no ring or mere traces of 

 one around apex, opening into halves by 

 a longitudinal slit. 



1008 



OSMUTTDA L. 



Fertile fronds or fertile portions very 

 much contracted, bearing short-pedicel- 

 led, naked sporangia on the margin of 

 the rachis-like divisions. Sporangia large, 

 globular, opening by a longitudinal cleft 

 into halves, bearing near apex a few 

 parallel striae, the rudiment of a trans- 

 verse ring. Spores g. Named for Os- 

 munder, a Saxon name for the divinity 

 Thor. Six species, mostly north tem- 

 perate. 



*Fronds bipinnate, fertile at apex. 

 O: REGALIS L. 



Canada to Fla; Miss. Synonyms: O. 

 spectabilis Willd. O. glaucescens Link. 

 *Sterile fronds bipinnatifid. 

 O: CLAYTONIANA L. 



Stipes tufted, 1 or more long, clothed 

 with loose woolly tomentum when young, 

 naked when mature; fronds 1-2 long, 8- 

 12' broad; pinnae oblong-lanceolate with 

 oblong, obtuse divisions; 2-5 pairs of 

 central pinnae fertile, fertile pinnules 

 dense, cylindrical; texture herbaceous. 

 Canada; Ky; northward. Synonym: O. 

 interrupta Michx. 

 O: CINISTAMOMEA L. 



Cinnamon-fern. Stipes densely tufted, 

 1 or more long, sterile and fertile fronds 

 distinct, clothed when young with ferru- 

 ginous tomentum; sterile fronds smooth 

 when mature, the pinnae bearing a tuft 

 of tomentum at base beneath, lanceolate, 

 cut into broadly oblong, obtuse divisions; 

 fertile fronds contracted, bipinnate, with 

 cinnamon-colored sporangia. New Eng- 

 land; Wis; Fla. Synonym: O. clay- 

 toniana Conrad. 

 Variety FRONDOSA Gray. 



Fronds in part sterile below, sparsely 

 fertile at summit. 

 Sub-order HYMENOPHYLLACEAE Endl. 



Sporangia borne on an elongate, often 

 filiform, receptacle, surrounded by a 

 complete transverse ring, opening verti- 

 cally. Sori terminal or marginal from 

 the apex of a vein. Indusium inferior, 

 com of same texture as frond. Fronds 

 delicately membranous and pellucid. 

 TBICHOMANES Sin. 



Indusia tubular, cup-shaped, or fun- 

 nel-shaped, sometimes 2-lipped. Filmy 

 fern. Near 100 species, of the tropics. 

 Section ETTTRICKOKAinSS 

 T: FETERSII Gray. 



Stipes 1-2" long; fronds 3-10" long, 

 1-2" broad, oblong-lanceolate or obo- 

 vate, entire or variously pinnatifid, the 

 younger ones with a few black hairs 

 along the margins; indusium solitary, 

 terminal, funnel-shaped, the mouth ex- 

 panded and slightly 2-lipped, the re- 

 ceptacle included. Winston Co, Colo 

 (Peters). 



T: RADICALS Swz. 



Rtstock wiry, tomentose; stripes as- 

 cending, 1-3' long, naked or nearly so, 

 com broadly winged; fronds 2-8' long, 

 l-lVz' wide, lanceolate or ovate lan- 

 ceolate, bipinnatifid; pinnae ovate, ob- 

 tuse, upper side of base parallel and 

 appressed to the winged rachis, lower 

 sid6 cuneate; divisions toothed or divid- 

 ed into linear lobes; indusia terminal on 

 short lobes, tubular or funnel-shaped, 

 the mouth slightly 2-lipped; receptacle 



