FILICES. 



425 



nules cuneate, rounded at top, nearly entire. 

 p. 3, 4. Calc. rocks. Sic. rare. — Guss. 



3. brachsnpliylluin. Frond bi-tripinnate. 

 Pinnules fan-shaped, inciso-lobate. Indusiuin 

 linear, hairless, dentato - crenulate. Seeds 

 pricldy. p. 5, 6. High rocks. Madonie. 

 On rocks opposite Isnello. — Guss. 



4. fissum. Prond ovate, tripinnate. Pin- 

 nules cuneiform, trifid. Segm. ending in 2 

 or 8 teeth, which are often emarginate. In- 

 dusium quite entire, p. Summer. Fissures 

 of high rocks, s. e. Alps.- — Koch. 



5. Breynii. Frond lanceolate, bipiunate 

 only at base, simply pinnate at top. Pinnae 

 cuneiform, inciso-deatate at top ; lower pinna- 

 tifid. Segm. cuneiform. Indusium quite en- 

 tire, p. Summer. Fissures of rocks. Ger. 

 occ. — Koch, who gives alternifolium and 

 germanicum {both belonging to one plant) as 

 synonyms ; but the desciiption is so different 

 that I insert it here. 



6. alternifolium. Frond linear, simply 

 pinnate. Pinnae cuneiform, cloven at top. 

 Indusium quite entire, p. 6-9. Walls and 

 rocks. Als. upper Loire. Sc. 



7- septentrionale. Frond of from 1 to 

 3 narrow, somewhat laciniate Lts., which are 

 cuneiform at base. p. Summer. Exposed 

 rocks. 



2. Frond not narrowed at base; or, if 

 narrowed, it is by the lower pinnee being 

 shorter. Ikvisions with a distinct midrib. 



8. viride. Frond linear, simply pinnate. 

 Pinnaj roundish ovate or rhombic, crenate. 

 Nerves simple, or forked above the sori. 

 Rachis green, without a scariose margin, p. 

 6-9. Calc. rocks. 



9. Trichomanes. Frond linear, simply 

 pinnate. Pinnaj roundish ovate, crenate. 

 Nerves forked below the sori. Rachis dai'lc, 

 polished, with a denticulate, scariose margin. 

 p. 5-9. Walls and rocks. 



10. marimim. Frond oblong, simply pin- 

 nate. Pinnte obliquely ovate, the base being 

 prolonged forwards, p. 6-9. Maritime rocks. 

 Not in Ger. 



11. pilosuiu. Frond lanceolate, alternately 

 pinnate. Pinnse ovate or ovato-oblong, in- 

 ciso-lobate and pinnatifid. Lobes obtuse, co- 

 vered with club-shaped hairs, p. 3, 4. Warm 

 calc. rocks. Pal. — Guss. 



12. obovatum. Frond bipinnate. Pin- 



nules obovate, nearly entire at the end ; the 

 lower pair shorter than the 2 or 3 above. The 

 sori are hardly longer than in Athyriura fon- 

 tanum. p. 4, 5. Igneous rocks. Isch. Sic. 

 and sic. Islands. 



13. lanceolatum. Frond bipinnate. Pin- 

 nules ovate, ending in acute teeth ; the lower 

 pair shorter than the two or three above. Sori 

 short, p. 6-9. Rocks and walls. Fr. Eng. 

 rare. 



14. Adiantui[n-nie;ruii[i. Frond bipin- 

 nate. Pinna; ovato -triangular, acmninate, 

 sharply toothed ; the lowest pair longest, p. 

 6-9. Rocks and loamy banks. 



15. Virgilii. Frond tripinnate. Pinnse 

 oblongo-lanceolate, very acmninate. Pinnules 

 lineari-lanceolate, acutely inciso-dentate. Sori 

 at last confluent, p. 2, 8 (6, Poll.). Vol- 

 canic rocks. Eug. hiUs. Sic. and sic. Isl. 



926. CETERACH. 



1. officinarum. Frond pinnatifid. Segm. 

 alternate, obtuse, densely scaly beneath, p. 

 4-9. Walls and rocks, s. and w. Eur. 



927. SCOLOPENDRIUM. 



1 . vulgar e. Fronds oblongo-linear, cor- 

 date at base, often curly at the end and some- 

 times divided, p. 7, 8. Damp and shady 

 banks. 



2. sagittatum. Frond hastate. Lateral 

 Lobes obtuse. Sori from twice to sis times as 

 long as broad, p. Maritime rocks. Mars. 

 Corsica. 



3. Heiuionitis. Frond 5-lobed, deeply 

 cordate at base. Sori 12 times as long as 

 broad, p. 4, 5. Shady rocks and walls. 

 San Michele. Trapani. 



928. BLECHNUM. 



1. boreale. Frond oblong, pectinato-pin- 

 natifid. Pinna; of fertile Frond linear, acute ; 

 of barren oblongo-linear, subobtuse. p. 7- 

 Moist loamy banks. 



929. WOODWARDIA. 



1. radicans. Frond pinnate. Pinnse some- 

 what stalked, pinnatifid. Div. lanceolate, acu- 

 minate, serrulate. Rachis proliferous, p. 

 6, 7- Shady rocks. Ischia. Sorrento. Sic. 

 rare. 



3 I 



