vein 



spur 1 

 querciJol 

 ' 3 ft I 

 bw (/ 



111 the A 



tidl k - 

 h b the 



ipuie 1 eiiing 



nest species D rigidula 



Br ) a similar but largei 



u also appeared at one time 



tl e 'ii ecies are seldom seen 



1 c lit V tl n in tl c iti D muiwfdlia is oeca 



n 1I\ pe n tii e 11 t where it is grown 



It t k t, 1 1 t 1 g:e w hich reminds one 



t tl e B 1 1 Ne t r n (Tl amnopteris) It is reallv a 



1 I 1 1 1 1 h s f 1 iLstription 



L M Underwood 



DKY6PTERIS ( r ek oth.fe>n) Poljpod tcea; 



^ I \ I 1 li tributed genus of hand ome 



II I t 1 age and bearing round son 



I ! 1 I t H 1 or reniform ludusia which 



1 tl e m The veins 



1 II 1 \ consider 



1 ng to this 



I own under 



1 m Other 



Poly I 

 Amen 

 te>>6 



rth 



I m U i It 



A T ems enttielj f ee 



B / I bed less than ot e third to n 1 t 



lurtipes K 11 tze ( 'Vephiddium hhtipes, Hook ) Lvs 



2-3 ft. long, 8-l() in. broad, on stalks clothed with dense 



black scales ; pinn* with broad, blunt lobes, the lower 



ones not reduced in size : sori medial on the lobes. In- 



BB. Piniiip cleft nearly to midrib, or h\i. bipinnnle 



or tripinnatifid. 



c. Texture thin, membranous ; reins simple or once 



forked. 



D. Loic, r p'liiinr ijr.nUially reduced to mere lobes. 



NoYeborac6nsis,(;ray(,l.s'pWiHm NoveboracSnse, Sw.). 



Lvs. soiuiwhat ilustiii-a from creeping rootstocks, pale 



green, 1-2 ft. long, tav>priug both ways from the middle. 



Canada to N. C. and Ark. 



Fischeri, Mett (Lastria opdea, Mett). Lvs. 6-8 in. 

 long, 2-3 in. wide, bipinnatifld, cut into close, entire 

 lobes, the lowest much reduced; surfaces smooth. Braz. 



DD. Lower pinncB scarcely smaller than those above. 

 E. Veins forked. 



Thelypteris, <ir:iy t As,,;, Hum Thelypteris, Sw. 1. 

 Marsh Fern. i-\s. -> at;^ ni ,,ii wide creeping black 

 rootstocks, 1-2 ft. Inni; : ihm^ho of the spore-bearing 

 pinnse often stroiiu'ly .(.iiv.ilui. : sori 10-12 to each seg- 

 ment. Canada to Fla. and Tp-\. 



EE. Veins simple. 



simul&ta, Dav. Lvs. scattered from a creeping root- 

 stock, 8-20 in. Inns:. 2-7 in. wide, with 12-20 pairs of 

 lanceolate pinnie : ^"ii lailn i- large, somewhat distant, 

 4-10 to each segiii. nt. Xati.. iii N. Y. and N. Eng.. 

 where it is often ii^ul ii-, .1 -.miIi I}. Thelypteris. G.F. 

 9:485. 



p4tens, Kuntze. Lvs. clustered at the end of a thick 

 rootstock, 2-3 ft. long, 4-10 in. wide, soft-hairy be- 

 neath ; pinnfe cut three-fourths to the midrib, the basal 

 segments usually longer. Fla. to Tex. and Trop. Amer. 

 A.G. 20:25. 



cc Textu 



: 2-i times 



DRYOPTERIS 



are much wider at base. Var. Clintonijlna is larger, 

 with pinna! 4-B in. long, and with the sori rather near 

 the midvein. Canada to Ark.; also in N. Eu. Hybrids 

 are described with I), marginalis. G.F. 9:445. 



GoUiekna, Gray (Aspldi urn Goldieinum, Sw.). Lvs. 

 growing in large crowns, 2-4 ft. long, 12-18 in. wide, the 

 pinnee broadest at the middle : indusia very large. 

 Canada to Ky. — One of our largest and most stately na- 

 tive species. 



DD. lyvs. mostlij bipinnate: indusia convex, rather 

 firm. 



Filix-mAs, Scbott (Aspidium FMix-mds, Sw.). Male 

 Fern. Lvs. growing in crowns, 1-3 ft. long, sori near 

 the midvein. Used as a vermifuge, as is also the next 

 species. N. Eu., Canada and Colo. 



743. Dryopteris marginalis. 



marginilis. Gray {Aspidium maryindle, Sw.). Fig. 

 743. Lvs. 6 in. to 2 ft. long, growing in crowns, mostly 

 in rocky places: sori close to the margin. Canada and 

 southward.— One of our commonest ferns. 



E. Zeaf-slalks naked, polished. 



viridfiscens, Kuntze. Lvs. 18-24 in. long, on stalks 

 two-thirds as long; lower pinnae largest: sori near the 

 midribs. Japan. 



EE. Leaf-stalks scaly. 



spinuldsa, Kuntze {Aspidium spinutdsum, Sw.). 

 Lvs. ovate-lanceolate, with a few pale, deciduous scales 

 at the base: indusia smooth, without marginal glands. 

 Var. intenn^dia, Underw., has more persistent scales, 

 with a brown center, and the margins of the indusia 

 with stalked glands. One of our commonest wood ferns 

 in the northern states.— Var. dilat&ta, Underw., has 

 similar scales to the last and tripinnate lvs. In woods, 

 from Canada to Ore. ; also in Europe. 



Bodttii, Underw. (Aspidium Bodttii, Tuckm.). Lvs. 

 elongate-lanc.i.Iatr, Willi l.ro.adly oblong pinnules: in- 

 dusia minui. I. :;l:iii.liilai-. (.'anada, N. Y. and N. Eng. 



I'le. 4-i-pinnatifid. 

 t ft. long, 2 ft. or more wide, 

 short, creeping rootstocks : 

 ifteri without indusia. Cuba 



eHusa, Kiiiii .1 . I 

 with polishiil ~i. Ill 



to Brazil. 



diss^cta, Kunt/..' [Lastr'ea membranifdlia, Hort.). 

 Lvs. 1-5 ft. long, 1-3 ft. wide, membranous, decompound ; 

 segments broad and blunt; surfaces nearly naked: sori 

 near the margin, abundant. India and Madagascar to 

 Australia. 



AA. Veins not entirely free, the lower reinlets of adjoin- 

 ing segments united. 



Ot&ria, Kuntze (ias^j-^a aristAta, Hort.). Lvs. 1 ft. 

 long, with a long terminal pinnas an inch or more wide, 

 with lanceolate lobes, and 6-12 similar lateral pinnse; 

 texture thin ; surfaces naked ; veins united half way 

 from the midrib to the edge. Ceylon to the Philippines. 

 —Good for table ferneries, but slow of growth. 



