ADIANTUM 



rubellum) : cemulum, No. 28 ; ^thiopioum, 24 ; affine, 

 9 ; amabile, 29 ; assunilc, 24 ; Baitsei, 19 ; bellum, 27; 

 Capillus-Veneris, 26 ; caxidatum, 2 ; Collisii, 22 ; con- 

 einuum, 23 ; ouneatum, 28 ; curvatum, 16 ; cyclosorum , 

 30 ; decorum, 30 ; diaphanum, 8 ; digitatum, 35 ; dolairi- 



ADIANTUM 



25 



34. Adiantutn Farleyense. 



forme, 1; J!dgeworthi{,2; elegans, 30; enuir- 

 ginatiim, 20 ; excisum, 25 ; Farleyense, 18 ; 

 Fergiisoni, 26 ; formosum, 11 ; fragrantissi- 

 mum, 28 ; graoilllmum, 34 ; hispidulum, 17 ; 

 intermedium, 10 ; Jordan!, 20 ; Kaulfussii, 5 ; 

 Jjathomi, 19 ; JjeGrandi, 34 ; lunulatum, 1 ; 

 macrophyllum, 4; Mairisil, 26; monochlaniys, 

 32; Moorei, 29; tnun-duliim, 28 ; Novse-Cale- 

 donice, 14 ; Oweni, 30 ; palmatum, 35 ; peda- 

 tum, 15 ; Peruvianum, 3; polyphyllum, 7; princeps, 19 

 pubescens, 17 ; pulvenilentum, 12 ; rliodophyllum , 19 

 rhomboideum, 13 ; rubellum, 31 ; Sanctce Catharince, 6 

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

 forme, 6 ; variegatum, 28 ; venustum, 33 ; Versail- 

 lense, 28; Victorim, 19; villosum, 13; Wagneri, 30; 

 Wiegandi, 30 ; Williamsii, 21. 



A. Fronds with a single row of small leaflets on either 

 side, rooting at the apex. 



1. lumil&tTiin, Burm.(4. (ZoZa5rj7(!rme,Hook.). Fronds 

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

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

 Amer., Australia. 



2. caud^tum, Linn. {A. Sdgeworthii,'Soo'k.). Fronds 

 6 in. to 1 ft. long on short brownish densely hairy stipes; 

 leaflets deeply cut into several spreading narrow lobes. 

 Old World. 



AA. Fronds with usually a single rmv of large leaflets 

 on either side, not rooting at the apex. 



3. Peruviinum, Klotzsch. Fronds 1 ft. or more long, on 

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

 long by 15^ in. wide, on slender stalks ; sori 8-10 on either 

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



4. macTOph^llum, 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 "A-l in. wide ; indusium 

 nearly continuous on either side of the leaflet. Trop. 

 Amer. 



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

 black stalks; leaflets 5-11, 2 in. long, %-i in. wide, with 

 unequal base ; indusia very long and narrow, forming an 

 almost continuous marginal band on either side of the 

 leaflets. Mex., W. Ind. 



AAA. Fronds at least hipinnate, the segments dimidinie, 

 i. e. with the vcinlets all springing from the lon-fr 

 side of the leaflet, wli ieh is twice as long as broad. 

 B. Leaflets iyi-2 in. long. 



6. trapezi!6rme, Linn. Frondsl8in. or more high, with 

 the terminal leaflet longer than the lateral ; leaflets trape- 

 zoidal, with parallel sides, K-Min. wide, lobed, and with 

 numerous sori. A. Sdnctce-Gatharlnai is a form with 

 deeper lobes. Trop. Amer. 



BB. Leaflets smaller, an inch or less long. 

 c. Stalks polished, smooth. 



7. polyphyllum, Willd. Fronds often tripinnate, with 

 stout black stalks; pinnae 6-8, long, with closely set leaf- 

 lets which are %-l in. long, the upper margin curved, 

 with 4-6 circular or oblong indusia. S. Amer. 



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

 ally with 1 or 2 pinnsB at the base ; leaflets J-^in. long, 

 Kin. wide, with numerous sori placed in tlie 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 %m. long, 

 Jiin. wide, the upper edge parallel with the lower, and 

 crenate, bearing numerous rounded sori on the upper 

 and outer margin. N. Zeal. 



oc. 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 ; 

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

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



CCC. Stalks rough or hairy. 



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

 as broad, mostly tripinnate, with rough scabrous stalks 

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

 rounded and toothed outer margins. Austral. 



12. pulverultotum, Linn. Fronds often a foot long,with 

 a large terminal pinna and several lateral ones, bipin- 

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

 lets %-l in. long, Min. wide, closely placed, the outer 

 edge rounded or truncate. W. Ind. 



13. villdsum, Linn. (4, rTiomtoWetim, Swartz). Fronds 

 large, with a terminal and several lateral pinnee 6-12 in. 

 long, on stout villous-hairy 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. Ndvae-Caleddnise, Keys. Fronds 0-8 in. long and 

 wide, somewhat pentagonal, once pinnate with one or two 

 secondary basal pinnffi on the lower side at base ; leaflets 

 attached to the rachises by a broad base, nearly 1 in. long, 

 pointed, irregularly incised, bearing 1—4 rounded sori 

 next to the base. New Caledonia. 



A AAA. Fronds forked, the two branches bearing pinnce 

 from the upper side. 



B. Stalks polished, smooth. 



15. peditum, Linn. Fig. 33. Common Maidenhair of 

 our northern states, with circular fronds on purplish 

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

 gardens, requiring a shady, moist and protected place. 



16. curv4tum, Kaulf . Fronds forked and with the main 

 divisions once or twice forked; leaflets 1-1 M in. long, 

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

 Braz. 



BB. Stalks scabrous {or rough) . 



17. hispidulum, Swartz (A. pubiscens, Sehk.). The 

 two divisions branching like a fan, with the largest pinnee 

 6-9 in. long, made up of numerous leaflets >2in. or more 

 long, two-thirds as broad, with numerous circular indusia 

 on the upper and rounded outer margin. Old World. 



