ADIANTUM 



ADIANTUM 



25 



rubellum) lemid n, \ 's Ttlii i i luii 24 , affine, 

 9; anuiliiU 2') i ii I t / li 1 < Hum, 27; 



Capillus \ enens ( 1 it n (II li eoii- 



cinnum 2^ cuin_ ituni „n iui\ iiiiii li / losnrtnii, 

 30 ; dtco mm, SO iliaph muiu s digit ituni io tlolahri- 







forme, 1; E(l(jeivorihii,2\ €l€gans,\\y!^\ emnr- 

 ginnfnt,i, 20 : txcisum, 1^5; FurU'Vt.-use, 18 ; 

 J*V/V"N"'", litl ; furmusvini. 11; fn'n/rantis.^i- 

 7nnm, l.>8 ; ^'rn.-illnuuin, ."U ; hispi.lulum, 17 ; 

 iuteriufdium, HI ; Jurdani, 20 ; Kaulfussii, 5 ; 

 Ijathomi.VJ; LeGraudi, 3-4; luuulatum, 1; 

 macrophyllum, 4; Mairisii,2<o', mouochlaiiiys, 

 32; Moorei, 29; mundulum, 28; NovaB-Cale- 

 doui£B, 14 ; Oweni, 30 ; palmatitm, 3ij ; peda- 

 fum. 15 ; Peruvianum, 3; polyphyllum, 7; prhiceps 

 pttbescens, 17; pulverulcntum, 12; rhodi>jihyJluni 

 •honiboideum, 13 ; rubellum, 31 ; Siuictce Cutharinu 



19 ; 



Siebrechtiij 30 ; speciosum, 35 ; tenerum, 19 ; trapezi- 

 forme, 6 : variegatuni, 28 ; venustuni, 33 ; Versail- 

 lense^ 28; Victori<t, 19; villosum, 13; Wagneri, 30; 

 Wiegandi, 30 ; Williamsii, 21. 



A. Fronds with a single row of stmtU h'afhfs on eltJnr 

 side, rooting at the apeji. 



1. lunulitum, Burm.(.4. doi'a?>r(7(5r»if.Hook.). Fronds 

 1 ft. long on blackish wiry polished stipes; lower leaflets 

 nearly semieireular, all on hair-like stalks. India, Trop. 

 Auier., Australia. 



2. caudatum, Linn. {A. £!dge worfliii, 'Rook.). Fronds 

 fi in. to 1 ft. lout,' on short brownish densely hairy stipes; 

 leaflets deeply cut into several spreading narrow lobes. 

 Old World. . 



AA. Fronds with usuaUi/ a single row of large leaflets 

 on either side, not rooting at the apes. 



3. Penivi&num, Klotzsch. Fronds 1 ft. or more long, on 

 polished stipes, with obliquely ovate pointed leaflets. 2 in. 

 long by 1 *2 in. wide, on slender stalks; sori 8-10 on either 

 side of the leaflet, twice as long as wide. Peru. 



4. macrophyllum, Swartz. Fronds 1 ft, long, on rather 

 stout polished stipes, with 4-6 pairs of wedge-shaped ses- 



sile leaflets lK-2 in. long by %-l in. wide ; indusiuni 

 nearly continuous on either side of the leaflet. Trop. 

 Amer. 



5. Kaulfussii, Kunze. Fronds 6-8 in. high, on slender 

 bhu-k stalks; leaflets 5-11, 2 in. long, %-l in. wide, with 

 uneijiial bas<-; indusia very long and narrow, forming an 

 almost continuous marginal band on either side of the 

 leaflets. Mex., W. Ind. 



AAA. Fronds at least bipinnate, the segments dimidiate, 

 i. e. tvifh the veinlets alt springing from the lower 

 side of the leaflet, ivhieh is twice as long as broad. 

 B. Leaflets l'^'2~2 in. long. 



6. trapezifbrme, Linn. Fronds 18 in. or more high, with 

 the terminal leaflet longer than ilu- lateral; leaflets trape- 

 zoidal, with parallel si<ies, '.^.-' ,iii. wide, lobed, and with 

 numerous sori. A. Sdi>r/<t -i'otJui nine is a form with 

 deeper lobes. Trop. Amer. 



BB. Leaflets smaller, an inch or less long. 

 0. Stalks polished, smooth. 



7. polyphyllum, Willd. Fronds often tripinnate, with 

 stdut Idaek stalks; pinnfE 6-8, long, with closely set leaf- 

 lets which are -^^-1 in. long, the upper margin curved, 

 with 4-0 circular or oblong indusia. S. Amer. 



8. didphanum, Blume. Fronds simply pinnate or usu- 

 ally witli 1 or 2 pinn» at the base ; leaflets J'ain. long, 

 ^4in. wide, with numerous sori placed in the sinuses of 

 the inner and outer edges. Asia to N. Zeal. 



9. affine, Willd. Fronds bipinnate, with a central pinna 

 and several lateral ones; leaflets not exceeding 54in. long, 

 ^4in. wide, the upper edge parallel with the lower, and 

 crenate, bearing numerous rounded sori on the upper 

 and outer margin. N. Zeal. 



CO. Stalks polished but somewhat tomentose. 



10. intermedium, Swartz. Fronds 1 ft. or more long. 

 with a terminal pinna and 1-3 lateral ones on each side; 

 leafl.ets 1 in. or more long, with interrupted sori on the 

 upper and two-thirds of the outer margins. Trop. Amer. 



CCC. Stalks roxigh or hairy. 



11. formdsum, R. Br. Fronds 1-2 ft. long, two-thirds 

 as broad, mostly tripinnate, with rough scabrous stalks 

 and rather small deeply lobed leaflets %-%m. long, with 

 rounded and tuuthed outer margins. Austral. 



12. pulvertil^ntum, Linn. Fronds often a foot long, with 

 a large termiiia! jjiniia and several lateral ones, bipin- 

 nate; stalks purplish, hairy, as are also the raehises ; leaf- 

 lets %-\ in. long, 34111. wide, closely placed, the outer 

 edge rounded or truncate. W. Ind. 



13. villbsum, Linn. {A.rho}iiho)deui}},^v^iirtz). Fronds 

 large, with a terminal and several lateral j.imue G-12 in. 

 long, on .stout villous-luiiry stalks ; leaflets numerous, 

 nearly 1 in. long ';(in. wide, trapezoidal, with the inner 

 side parallel to the rachis ; indusia forming an almost 

 continuous line along the upper and outer margins. W. 

 Ind. and S. Amer. 



14. N6vae-Caleddiiiae» Key.s. Fronds 6-8 in. long and 

 wide, some what ])ent agonal, once pinnate with one or two 

 secondary basal piniue on the lower side at base; leaflets 

 attached to the raehises by abroad base, nearly 1 in. long, 

 pointed, irregularly incised, bearing 1—4 rounded sori 

 next to the base. New Caledonia. 



AAAA. Fro7ids forked, the tiro bratiches bearing pintup 



from the upper side. 



B. Stalks polished, smooth. 



15. peditum, Linn. Pig. 33. Common JIaidenhaik of 

 our northern states, with cin-ular fmnds on jmrplish 

 stalks 1 ft. or more high. — Sometimes transplanted into 

 gardens, requiring a shady, moist and protected place. 



16. curvitum, Kaulf. Fronds forked and with the main 

 divisions once or twice forked; leaflets 1-1 J-i^ i". long, 

 nearly Vain, wide, the upper margin rounded and lobed. 

 Braz. 



BB. Stalks scabrous {or rough), 



17. hispidulum, Swartz (-1. pubt^seens, Schk.l. The 

 two divisions branching like a fan. with the largevi piunas 

 (;-9 in. loni:. made u|. of numerous leaflets ^.in. .-r more 

 long, two thinls as broad, with numerous circular inriusia 

 on the upper and rounded outer margin. Old World. 



