26 ADIANTUM 



AAAAA. Fronds at leant tjipinnaie, often tripinnaie or 

 quadripinnate, with numerous rather smalt 

 fan-shaped or wedge-shaped leaflets with veins 

 radiating from the base. 

 B. Leaflets an inch or less across. 

 c. Hdges deeply cut into a series of narrow lobes. 

 18. FarleySnse, Moore. Pig. 34. Ffonds often reach- 

 ing 15-24 in. in length, forming a rich profusion of 

 closely overlapping pin- 

 nffi, light green; leaflets 

 more or less wedge- 

 shaped at base, with cur- 

 ved sides and the outer 

 margin rounded and 

 deeply cut into 10-15 

 narrow lobes, which rare- 

 ly bear sori. Barbadoes. 

 I.H. 19: 92. -Said to be a 

 garden variety of A. te- 

 nerum, but apparently a 

 good species, 

 cc. Edges not lacin- 



lately cut. 

 19. Mnerum, Swartz. 

 Fronds deltoid, 12-15 in. 

 long, two-thirds as wide, 

 the terminal leaflets 

 equally, the lateral un- 

 equally wedge-shaped at 

 base, all of them rhombic 

 an.ldrri.lu.ms wlirn.lrv, 



Victuruv, A. i-huilupliyl- 

 lum, A.princeps, and A. 

 Baiisei are horticultural 

 fonns. Fla. and Trop. 

 Amer. 



20. J6rdani, C. Muell. 

 {A. emargindtum, D. C. 

 Eaton, not Hook.). 

 Fronds 1 ft. or more long, 

 6 in. wide, mostly twice 

 pinnate , with nearly 

 semicircular leaflets ; 



sori elongate, the indusium almost continuous around the 



margin of the leaflet. Calif, iml 'i,,^. 



21. Williamsli, Moore. Iii ^ i i: 'n-. nearly 1 ft. 

 high; leaflets nearly .semi.i I. : i i . I mti the outer 

 margin, bearing 5-8 sori c^.m i-o \iiii liili.ng indusia. 

 Peru. — Similar in habit to tlic la^i. Lint ^-lualler and with 

 more numerous sori. 



BB. Leaflets mostly less than a half inch across. 

 c. Fronds iit h'ust quadripinnate, broader than long. 



22. C611isii, M . I'r.mds 1 ft. or more long, very 



broad, til. :i|.iiarently repeatedly forking; 



leaflets I'll nneate, those towards the outer 



portions I^uli r :uir| [:ii;:,rthan those nearer the base.— 

 Of garden urigui, possibly a hybrid. 



CC. Fronds mostly triangular or oblong, longer 



than broad. 



D. Shape of leaflets rhombic, the indusia kidney-shaped 



or nearly circular. 



23. ooncinnum, HBK. Fig. 35. Fronds 2-3-pinnate, 

 12-18 in. long, G-9 in. wide, on rather stout black stalks; 

 leaflets rhombic-oblong, sli^'litly lobed; sori 4-8 on each 

 leaflet, usually set (lose tn^-, tlur, Mex. to Braz. 



DD. Shape of h-iifhii ,:.„„<t/^If nith obtuse base, small 



24. .ffithidpicum, I.iiin. ( .1 . ./.sMiH/7f, Swartz). Fronds 

 1 ft. or more long on slender stalks, 2-3-pinnate, rather 

 narrow; leaflets roundish or ob.scurely 3-lobed, the mar- 

 gin finely serrulate ; sori 2-3 to a leaflet, with oblong or 

 kidney-shaped indusia. Afr. and Austral. 



25. exclsum, Kunze. Fronds 2-3-pinnate, 6-12 in. long, 

 3-4 in. wide; leaflets about Kin. wide, roundish, with the 

 margin cut into small rounded lobes; sori large, 2-4 to 

 each leaflet, kidney-shaped or circular, Chile. 



ADIANTUM 



DDD. Shape of leaflets distinctly citneate at the base. 

 E. Indusia oblong or indistinctly lunate. 



26. Capfllus -Veneris, Linn. (A. Firgusoni, A. Mai- 

 Hsii, Moore). Fig. 36. Fronds 2-3-pinnate, 6-20 in. long, 

 3-8 in. wide; leaflets nearly Kin. wide, more or less ir- 

 regularly lobed at the outer iii:ir_':i; : -'■■■] 1 :; t.. . :,. h 

 leaflet, with oblong or mon- a 

 indusia. Native southward. ■ I i -i i : it 

 throughout the Old World.- i: I i- ;;i ,1.11, >:.i, ;.,-, 

 some of them deeply lobed, liki- A. i'u/i'<;/i-.oc ; a com- 

 pact imbricated form is very efl'ectivc. 



27. bfillum, Moore. Small, .3-8 in. high, bipinnate; leaf- 

 lets with the outer margin erose and often divided into 

 2-3 shallow lobes ; sori 2-3 to each leaflet, rather long 

 and broad or somewhat lunate. Bermuda. 



EE. Indusia nearly circular, with a narrow sinus. 



28. cuneittun, Langs. & Fisch. {A. cemulum, A. mUn- 

 dulum, Moore. A. VersailUnse, A. fragrantlssimum, 

 Hort. ) . Fronds 3-4-pinnate, deltoid, 6-15 in. long, 5-9 in. 

 wide ; leaflets numerous, obtuse or broadly wedge-shaped 

 at base, the margin rounded and more or less crenately 

 lobed ; sori 3-5 to each segment, with rather small rounded 

 indusia. Braz.— Runs into many forms, of which A.va- 



29. Modrei, Baker (A. amdbile, Moore, not Liebm.). 

 Fronds 2-3-pinnate on long slender stalks, 6-15 in. long; 

 leaflets M-Kin. long, rhomboidal, with wedge-like base, 

 deeply lobed ; sori of medium size, 4-6 to each leaflet. 

 Peru. 



.'10. 'Wfigneri, Mc-tt. (.1. decorum, A.Wiegandi, A. ile- 

 .laiix. .1. <h,; lu. A . ,';irh,sn,-i,m, Moore). Fronds 2-3-pin- 

 iiiii. .i;-:i ill. I'.iiL', ( (i ill. Willi-; lateral leaflets rhomboid, 

 ilii 1,111 Ml! ill I'liii. ill.'. -liL'litly lobed or incised ; sori 4-6 

 111 . a.h li-:iil.t, Willi V. TV liirijc membranous circular in- 

 dusia. Peru. — ^1. Siihriihtii, Hort., "supposed to be a 

 cross between A. deeoriim and A. Williamsii," has 

 strong, graceful fronds thickly set with round pinnules 

 of firm texture. 



31. ruhfeUum, Moore. Fronds 4-6 in. long, deltoid, bl- 

 pinnate ; texture membranous, bright green, reddish 

 when young ; leaflets %\n. wide, deltoid or the lower 

 rhomboid, the outer margin deeply lobed and the lobes 

 finely toothed ; sori round at the apices of the lobes. 

 Bolivia. 



f Adiantum CapillusVeneris. Natural size. 



