AN ENCYCLOPAEDIA OF HORTICULTURE. 



195 



Polypodium conttnuca. 



P. venosum (veined). A synonym of P. lyeopodimde*. 



P. venustum (charming). A synonym of P. himalayente. 



P. verrncosmn (waited).* xti. firm, erect, lift to 2ft. long, 

 terete, naked, fronds 3ft. to 4ft long, 1ft broad ; pinna- 6in. to 

 Sin. long, iin. to fin. broad, entire ; rachis and both surfaces 

 sometimes slightly hairy, son confined to the inner row of 

 areolae, firm, immersed, forming very distinct papillae on the 

 upper side. Philippines and Malaccas. (H. G. F. 4L) SYN. 

 ScAcUolepis verrueosa. 



FIG. 246. POLYPODIUM VULGARE, showing Habit and Under 

 Surface of Portion of detached Frond. 



P. vnlgare (common). Adder's Fern ; Brake-root ; Golden 

 Maidenhair ; Wall Fern ; Wood Fern. rhiz. stout, with bright 

 ferruginous scales, gti. firm, erect, 2in. to 4in. long, stramineous. 

 fronds bin. to 12in. long, Sin. to 6in. broad, cut nearly or quite to 

 the rachis ; pinnae Jin. to Jin. broad, close, entire or slightly 

 toothed, usually blunt, tori large, uniseriate. Temperate regions 

 (Britain, Ac.). See Fig. 246. Of this species, there are many 

 varieties. The following are the most desirable. 



P. V. aurittun (eared). This differs from the type in being 

 auriculate at the base of the pinnae, on the upper, the lower, or 

 both, margins. The fronds are lOin. to 15in. long, and over 2in- 

 wide. 



P. V. bifidum (twice-cut). A variety with fronds lOin. to 15in. 

 high and Sin. wide, with the lobes forked, or sometimes hi- 

 furcate. 



Polypodium continued, 



P. v. 



cambricmn (Welsh).' frond* 12in. to 2Cin. Ion" 4in. to 

 8m. wide, broadly ovate, bipinnatifid ; pinna ovate-lan'ceolate 

 pinnules imbricate.!, and serrated on the margins. O " e ^f & 



margin 



earliest-known, best, and most distinct, f-.nni See Fig 247 

 P. v. composltum (compound), frond* 1ft. U. lift long, about 

 4m. wide; some of them furcate on the i>oiiiu of the 



serrate> others much 



P. V. cristatum (crested), frond* about 15in. Ion" Sin to 

 Jin. wide, the apex bifid, each branch again forking, and often 



FIG. 248. POLYPODIUM VL'LGARE ELEGA.VTISSIMUI 



A form with very flnely- 



r, T 



apex; 



(son-bearing above), frond* lOin. to 

 frequently prodnrt-d at the margins of 

 b of England. A very singular and rare 



FIG. 247. FRO.ND OP POLTPODIUM VLLGARE CAMBRICUM. 



P. v. elegantissimum (most elegant).* 

 divided fronds. See Fig. 248. 



P. v. marginatnm (margined), frond* about 1ft lo : , t , linear- 

 lanceolate ; pinnae unequally, sometimes deeply, serrate. 



P. T. xnultifido-cristatnm (multifid-crested). A form with 

 fronds 6in. to lOin. long, 3in. of which have only a narrow wing on 

 each side of the stipes, but they are much forked upwards, and 

 produced in a dense, multifid crest 



P. v. omnilacenun (wholly-torn), frond* pinnatifid; pinnae 

 deeply lobed, similar to camlrricum, but the lobes are not im- 

 bricated, and the tip of each pinna is more lengthened out A 

 handsome and rare variety. 



P. v. pulcherrimum (very beautiful), fronds 1ft or more long, 

 about 6in. wide, very similar to those of cambricum, the apex 

 deeply serrated. A grand variety. 



P. T. semilacenun (half-torn), fronds 1ft to l^ft long, fin. to 

 6in. wide, below deeply bipinnatifid, pinnate towards the 

 pinnae irregularly toothed. Ireland. A handsom 



P. v. suprasorifemm (sori-bearing above). 

 12in. long, narrow, tori freq 

 the upper surface. South of 

 plant 



P. v. variegatum (variegated^ A pretty, but somewhat uncer- 

 tain, form, distinctly spotted and striped with whitish-yellow. 



P. Wildenovli (Wildenow'sX A synonym of P. propinquum. 

 POLYPODY. See Polypodium. 



POLYPOR.US (from the Greek polyporws, having 

 many outlets ; in allusion to the many openings or pores 

 on the lower surface of the pileus). A genus of Fungi, 

 belonging to the Hymenomycetes, or those in which the 

 spores are formed on the tips of small projections from 

 larger cells (of which each gives off four spores) on the 

 surface (bymeninm) of a definite part of the Fungus. See 

 Mushrooms. The species of Polyponu differ from the 

 true Mushrooms in that, while the latter bear the hyme- 

 nium on the gills, the former bear it in a number of small 

 tubes packed together to form a layer of peculiar aspect 

 and texture on the lower surface of the cap, or pileus. 

 They are usually dry and hard in texture, after a short 

 time, and are rather long lived. They, at first, emit an 

 acid smell, but afterwards are nearly without smell. 

 They vary in form, and grow indefinitely. Those para- 

 sitic on trees usually have the pileus sessile, and fixed 



