ASPLENIUM. 



639 



a position naturally moist and shady. Whether grown in pots or planted in 

 the Fernery, it is very important that the crowns should be kept well above 

 the surface of the soil, so as to prevent water from resting on them. 



Several forms of the Wall- Rue are known in cultivation, but on account 

 of their small dimensions even the most distinct are not very conspicuous. 

 The following, however, are the most worthy of notice and are figured in 

 Lowe's " Our Native Ferns " : 



A. R.-m. attenuatum — at-ten-u-a'-tum (diminished), Lowe. 



An unusually large-growing form, found at Athlone, and one which 

 produces fronds oin. to 6in. long, borne on stalks about 4in. long, and 

 furnished with large leaflets that are laciniate (torn) at the summit. — Lowe, 

 Our Native Ferns, ii., p. 223, fig. 587. 



A. R.-m. cristatum — cris-ta'-tum (crested), Wollaston. 



A very variable form, having some of its fronds tasselled at their 

 extremity, others with apical lobes folded on each other, pinnules (leafits) 

 narrowish, those towards the point of the frond or leaflets enlarged at their 

 tips and somewhat crispy. It was originally discovered near Ruthin Castle, 

 Denbighshire, and has also been found near Guildford and near Tunbridge 

 Wells. — Lowe, Our Native Ferns, ii., p. 225, fig. 592. 



A. R.-m. CUneatum — cun-e-a'-tum (wedge-shaped), Moore. 



A form with fronds simply pinnate, originally discovered at Stenton Rock, 

 near Dunkeld, Perthshire ; it has also been found near Bristol. — Lowe, Our 

 Native Ferns, ii., p. 224, fig. 590. 



A. R.-m. proliferum — pro-lif'-er-um (bulbil-bearing), Wollaston. 



A proliferous form, originally found near Guildford, and characterised 

 by young plants being situated in the axils of the leaflets. — Loive, Our 

 Native Ferns, ii., p. 226. 



A. R.-m. ramo-depauperatum — ra'-mo-de-pau-per-a'-tum (branched 

 and impoverished), Clapham. 

 A form with branched and depauperated fronds borne on exceedingly 

 long stalks and furnished with leaflets variable in size and form. It was 



