414 



ASPLENIUM 



ASPLENIUM 



2. Nidus, Linn. (Thamndpleris Xidits, Presl. A. and 

 T. X'lilus-aris, Hort.). Bird's-nest Fern. Fig. 414. 

 Much like the preceding in si/.e and habit of growth, but 

 with entire margined Ivs. and with the veins partly 

 united to form a net. 



BB. Lf. lobed or pinnaiifid. 



3. Hemionitis, Linn. (.4. palinaliim, Lam.). Lf. 4-6 

 in. each way, }uistate, with a triangular terminal lobe 

 and 2 lateral ones, and a large, roundetl sinus at the 

 base: sori often over 1 in. in length. Spain, Canary 

 Isls. S. 1:.5S6. 



4. pinnatifidiun, Xutt. Lvs. clustered, from a short 

 rootstock, 3-9 in. long, with mostly rounded lobes at the 

 base and terminating in a slender point; texture thick, 

 herbaceous; occasionally rooting at the tip. Pa. to Ala. 

 S. 1:628. 



5. ebenoides, R. R. Scott. Texture thin: lvs. 5-10 in. 

 long, with a few irregular di\'isions near the base, and 

 a long, slender, much-incised apical portion, occasionally 

 rooting at the apex. A very rare native fern. — One of 

 the verj- few definitely proved fern hybrids, its hybrid 

 name being A. platyneuron x Camptosorus rhizophyllus. 



414. Asplenium Nidus. ( Xriy) 



6. aiatum, HBK. Lvs. 1 ^-2 ft. long, the stalks 4-6 

 in. long, winged above, the blades 1-1 J-^ ft. long, 3-4 

 in. broad, deeply pinnatifid, the rachis winged 

 throughout, the lobes 1-114 in. long, J^^^in. broad, 

 herbaceous. — VV. Indies and S. Amer. 



BBB. Lf. once pinnate. 



c. Pinnx less than ^in. long, blunt. 



D. Rachises greenish. 



7. viride, Hudson. Lvs. 3-8 in. long, scarcely more 

 than ]/2'^c- wide, with numerous rather distant Ifts., which 

 are ovate and deeply crenate: .sori abundant, oblique. 

 A Bubalpine species of X. Eu. and N. Amer. S. 1 :661. 



DD. Rachises purplish or blackish. 



8. Trichomanes, Linn. Lvs. densely clustered, 3-8 in. 

 long, J^in. wide, with densely crowded oval Ifts. which 

 are slightly crenate on the upper side and suddenly nar- 

 rowed at the base. Northern hemisphere generally. A.G. 

 13:6.53. 8.1:6.53. Gn. 59::i\8 (an A. incisum). 



9. resiliens, Kunze (A. pdrvulum, Mart. & Galcotti). 

 Lf . .5-9 in. long, with 2f>-.30 pairs of mostly opposite Ifts., 



which are '4-^8 in. long, rounded at the outer margin 

 and squarely truncate at the base. Southern states and 

 Mex. 



cc. Pinnx ^-1 in. long, with a strong auricle at the upper 

 side of the base or deeply incised on the upper margin. 



10. platynefiron, Oakes (.4. ebeneum, Ait.). Lvs. 6-15 

 in. long, with 30-35 pairs of Ifts. which have an en- 

 larged auricle at the upper side at the base, the lower 

 Ifts. reduced to mere triangular auricles: sori, when 

 mature, covering the entire surface. Canada to S. 

 Amer. A.G. 13:654. S. 1:53.5. 



11. formosum, Willd. Lvs. 12-16 in. long, with 

 numerous alternate pinna; which are mostly deflexed, 

 with the upper margin deeply incised and the lower 

 margin toothed: sori 3-5 to each 1ft. Trop. Amer. S. 

 1:570. 



12. tenenun, Forst. (A. Veitchianum, Hort.). Lvs. 

 1-1? 4 ft. long, the .stalks 4-6 in. long, grayish, the 

 blades 8-15 in. long, ,3-4 in. broad, 1-pinnate with 10-20 

 pairs of stalked pinnje, the pinnae 1-1 J 2 in- long, }4~ 

 J gin. broad, rounded, toothed, inequilateral, usually 

 auricled. Asia, Malaya. 



13. Colensoi, Col. Stalks .3-4 in. long, with small 

 scales: If.-blades 4-5 in. long, 2 in. broad; pinna 

 numerous, spreading, the lower pinnatifid auricled, on 

 stalks M~3^in. long. New Zeal. 



ccc. Pinnx 2-6 in. long, linear or lanceolate. 



14. angustifolium, Michx. Lvs. 18-24 in. long on 

 stout stalks, 4-6 in. wide, with 20-30 pairs of nearly 

 sessile pinnse, which are truncate at the base and extend 

 to a tapering point; fertile pinnae narrower and more 

 distant. Moist woods northward. S. 1:496. 



15. salicifolium, Linn. Lvs. 12-18 in. long, with about 

 20 distinctly .stalked horizontal pinna;, which are wedge- 

 shaped at the ba.se, and curve upward to a long point: 

 sori strongly obUque to the midrib, wide apart, not 

 reaching either margin or midrib. VV. Indies to Brazil. 



16. caudatum, Forst. Stalks 4-6 in. long, densely 

 clothed with fine fibrillose scales: blades 12-18 in. long, 

 4-8 in. broad, with 20-30 pairs of pinnae, the pinnae 

 3-4 in. long, J2-I in. broad, acuminate, deeply toothed, 

 auriculate above. Polynesia, Malaya. 



17. l&cidum, Forst. Stalks 3-6 in. long, gra3'ish, 

 densely clothed with large gray scales, the blades 1-2 ft. 

 long, 4-8 in. broad, oblong, or ovate-deltoid, with a 

 terminal pinna and 15-20 pairs of lateral pinnEe; pinnae 

 4-6 in. long, 1-1 K in. broad, acuminate, toothed. New 

 Zeal. 



BBBB. Lf. 2-4 pinnate. 



c. Ultimate divisions linear or cuneate: venation somewhat 



fan-shaped: texture thick. 



18. Baptistii, Moore. Lf. bipinnate, with broadly 

 ovate pinnae 5 in. or more long, each with about 4 stipi- 

 tate linear toothed pinnules; sori nearly parallel with 

 the midvein and close to it; rachises scaly, with pur- 

 plish lined scales. South Sea Isls. 



19. affine, Swartz. Lf. 9-18 in. long, with numerous 

 pinnae on either side, the lower ovate deltoid, the upper 

 lanceolate; pinnules incised: sori Unear. Mauritius 

 and Ceylon to E. Indies. 



20. Adiantum-nigrum, Linn. Stalks brownish, lvs. 3- 

 pinnatifid from winged rachises, triangular, 5-9 in. long; 

 ultimate divisions ovate, sharply incised and serrate on 

 both sides. Old World generally. 8.1:486. 



21. cuneatum, Lam. Lvs. 12-16 in. long, 4-6 in. wide, 

 tripinnate below, the ultimate divisions broadly obtuse 

 above and strongly cuneate below: sori linear, usually 

 long for the size of the segms. Tropical regions 

 generally. 



22. fragrans, Swartz (A. faeniculaccum, Kunth). 

 Lvs. 2-3-pinnate; ultimate segms. lanceolate, sharp- 

 eerrate above; veins simple or the lowest forked: sori 



