ASPLENIUM. 529 



see if it was planted. Formerly on Amersham Church, Backs ! 

 Wybourn, Westin. Hudson. Northumberland. J. Backhouse. 

 Tany Bwlch and Tremadoc, Merionethshire. Ashford, Hants ! 

 P. VI. IX.] E. 



2. A. lanceoldtnm (Huds.) ; fronds lanceolate bipinnate, pin- 

 nules obovate deeply and sharply toothed or lobed, clusters short 

 nearly marginal. E. B. 240. H. F. 32. N. 249. Fronds 

 sometimes nearly linear and simply pinnate, always narrowed 

 at the base. Clusters oblong, ultimately rather confluent into 

 roundish masses. Rocks and walls, rather rare. P. VI. IX. 



E. I. 



3. A. Adiantum-nigrum (L.) ; fronds ovate triangular or tri- 

 angular-prolonged twice or thrice pinnate, pinnae and pinnules 

 triangular sharply toothed, clusters long central. E. B. 1950. 

 N. 225. Clusters 2 or 3 times as long as in the preceding', 

 placed near the midrib and ultimately confluent in oblong masses 

 often covering the whole under surface of the pinnule. a; 

 fronds about as long as the stipe ovate-triangular, pinnae and 

 pinnules triangular-prolonged, ultimate subdivisions blunt. /3. 

 A. Serpentini (Tausch) ; pinnules triangular very broad, lobes 

 ovate blunt. y. A. acutum (Bory) ; fronds much shorter than 

 the stipe triangular-prolonged, pinnae and pinnules lanceolate- 

 attenuate, ultimate subdivisions very acute. N. 231. Rocks 

 and walls. /3. u Serpentine rocks of Cabrach, Aberdeenshire." 

 T. Moore. A. South-west of Ireland. P. VI. IX. Black 

 Spleenwort. E. S. I. 



4. A. Trichom'anes (L.) ; frond linear pinnate, pinnae roundish- 

 ovate crenate, veins forked below the clusters. E. B. 576. Jf. 

 P. 29. N. 285. Rachis black, keeled beneath. Pinnae scarcely 

 oblique ; both edges rounded and crenate except at the base, 

 upper often bluntly auricled below. /3. A. anceps (Sol. ?) ; 

 pinnae oblong blunt wedgeshaped below upper edge and end 

 crenate-dentate lower entire. Pinnae oblique, lower edge nearly 

 straight ; lower pinna much the smaller. A curious variety is 

 occasionally found with its pinnae deeply but irregularly pin- 

 natitid with linear notched segments. [A. Clermontce (Sy.) is appar- 

 ently a hybrid between this and Sp. 7.] Rocks and walls. )3. 

 Killarney. P. V. X. Common Spleenwort. E. S. L 



5. A. vir'ide (Huds.) ; fronds linear pinnate, pinnae roundish- 

 ovate or rhomboidal crenate, veins simple or forked beyond the 

 sori.E. B. 2257. H. F. ^.Rachis green, not keeled. Sori 

 at length confluent. Rocks and mountains. P. VI. X. 



E. S. I. 



2A 



