AN ENCYCLOPEDIA OF HORTICULTURE. 



189 



Folypodium continued. 



P. diversifolium (variable-fronded). gti. 1ft. to 2ft. Ions, 

 tufted, slender, naked, fronds 1ft. to 2ft. long, 6in. to 9in. 

 broad; pinnae Sin. to 5in. long, Jin. to lin. broad, the apex 

 acuminate, the lower ones narrowed at base, the edge nearly 

 entire, sori in contiguous rows. South Brazil, Ac. See Fig. 

 232. SYN. P. fraxinifolium. 



P. diversifolium (variable-fronded), of E. Brown. A synonym 

 of P. rigidulum. 



P. drepanum (sickle).* sti. tufted, 1ft. to lift, long, with dark 

 scales below, fronds lift, to 3ft. long, Sin. to 12in. broad ; lowest 

 pinnae the largest, 6in. to Sin. long, liin. to 2in. broad ; pinnules 

 lanceolate, unequal-sided, auricled on the upper, truncate on the 

 lower, side at the base, with a broad, uncut centre and copious, 

 spinous teeth, the lowest stalked. sori medial. Madeira. 

 Greenhouse. See Fig. 233. SYN. Phegopteris drepana. 



FIG. 234. POLYPODIUM DRYOPTERIS. 



P. Dryopteris (Dryopteris).* Oak Fern. rhiz. slender, wide- 

 creeping. gti. 6in. to 12in. long, slender, stramineous, scaly 

 below, naked upwards, fronds 6in. to lOin. each way, deltoid ; 

 lower pinnae much the largest; pinnules lanceolate, only the 

 lowest free, oblong, slightly crenate. sori sub-marginal. Northern 

 hemisphere (Britain). See Fig. 234. 



P. D. Robertianum (Herb-Robert scented). A variety with a 

 thicker rhizome, the whole plant being more rigid than in the 

 type, and finely glandular. (H. B. F. 5.) 



P. elasticnm (elastic), rhiz. stout, woody, short-creeping or 

 sub-erect, with brown scales, fronds 9in. to 18in. long, 2in. to 4in. 

 broad, lanceolate, cut down to the rachis into patent, adnate, 

 ligulate, entire, blunt forty to one hundred-jugate pinnae, the 

 lower ones gradually reduced, sori minute, superficial, medial. 

 Mexico, &c., 1824. SYNS. P. Plumula, P. Schkuhri. 



P. ensifolium (sword-fronded). A form of P. angustifolium. 



P. Filipes (thread-footed). A young state of P. tenellum. 



P. fraternum (fraternal).* rhiz. wide-creeping, with bright 

 ferruginous scales, sti. 4in. to Sin. long, firm, erect, naked. 

 fronds 1ft. to lift, long, 6in. to 9in. broad ; lower pinnae lin. 

 apart, 4in. to 5in. long, narrowed at both ends, and with 

 obscurely crenated edges, sori slightly immersed, medial, 

 uniseriate. Mexico. SYN. P. Henchmanni. 



P. fraxinifolium (Ash-leaved), rhiz. stout, with dark brown 

 scales, tti. 1ft. to 2ft. long, firm, erect, naked. fronJs 2ft. to 

 4ft. long, 1ft. to IJft. broad; pinnae numerous on each side, 

 distinct, 4in. to Sin. long, lin. to 2in. broad, the apex acuminate, 

 the base nan-owed, and the edge entire, sori and areolce in 

 series of six to eight. Columbia, &c. See Fig. 235. SYN. 

 GoniophUbium fraxinifolium. 



P. fraxinifolium (Ash-leaved), of Jacquin. A synonym of 

 P. diversifolium. 



P. Gardner! (Gardner's), rhiz. short-creeping; scales black, 

 bordered with brown, gti. Sin. to 4in. long, firm, naked, fronds 

 1ft. to lift, long, lin. to IJin. broad, narrowed gradually towards 

 both ends, with entire edges ; lower surface densely grey-tomen- 

 tose. sori in close rows of about four each between the main 

 veins. Ceylon. (H. E. F. 6a) SYN. Siphobolus Gardneri. 



P. geminatum (paired), rhiz. very wide-creeping, stout, with 

 ferruginous scales, fronds sub-sessile, usually in distant pairs, 



entire, uniform, Sin. to 6in. long, iin. to lin. broad, narrowed 

 both ends, but the point often blunt tori in a row 



towards 



Folypodium continued. 



midway between the edge and midrib, distinctly immersed 

 Brazil. SYN. Anapeltis geminata. 



P. Ghiesbreghtil (Ghiesbreght's). sti. 1ft or more long, firm 

 erect, densely villous. fronds 1ft to IJft. long, with a terminal 

 pinna 6in. to 9in. long, lijn. to 2in. broad, the edge slightly 

 lobed, and three to six similar ones on each side ; rachises and 

 under surface densely villous, upper surface slightly so. sori in 

 dense rows close to the main vein. South Mexico. SYN. Gonio- 

 pteris crenata. 



(glaucous-fronded). rhiz. wide-creeping, 

 ly. gti. 2in. to 6in. long, scattered, firm, 

 ids 4in. to lOin. long, lin. to 2in. broad, 

 rounded base and an 



P. glancophyll 



firm, deciduousl 



usly 



erect, glossy, fr 

 uniform, oblong-lanceolate, entire, with 



acuminate point, areolce four to six in a series between the 

 edge and midrib, with one sorus in each. Tropical America, &c., 

 1874. SYN. Goniophlebium glaucophyllum. 



P. gonatodes (angled). A synonym of P. pUswsorum. 



P. grandidens (large-toothed). A variety of P. persicaifolium. 



P. grandifolium (large-fronded). A variety of P. membranaceum. 



11 



FIG. 235. PINNA OF POLYPODIUM FRAXINIFOLIUM. 



P. guatemalense (Guatemalan^ sti. 6in. to 12in. long, naked, 

 stramineous, fronds 2ft to 3ft. long, 1ft or more broad, with an 

 entire, terminal pinna 6in. to Sin. long, lin. to liin. broad, and 

 several similar ones on each side, the upper ones narrowed, but 

 adnate at the base, areolce in series of three or four, with the 

 large, uniseriate sori in the first or second row. Guatemala. 

 SYN. Phlebodium incequale. 



P. harpeodes (scimitar-like). A synonym of P. lorieeurr. 

 latipea. 



P. hastaofolium (spear-fronded). sti. tufted, lin. to 2in. long, 

 wiry, deciduously scaly, fronds 6in. to 9in. long, IJin. to 2in. 

 broad ; pinnae blunt, entire, iin. broad, with a sharp, distinct 

 auricle on both sides at the base, those of the lower half of the 

 frond gradually reduced, sori below the middle of the vein'ets. 

 West Indies. SYN. Phegopteris hastcefolia. 



P. hemionitideum (Hemionitis-like). rhiz. hypogaeous, woody, 

 sti. lin. to 6in. long, firm, woody, fronrlg 9in. to ISin. long, 2in. 

 to 3in. broad, narrowed to both ends, with entire edges, sori in 

 an irregular row between each main vein, often confluent. India 

 and China. SYN. Colysis membranacea. 



P. Henchmanni (Henchmann's). A synonym of P. fraternum. 



P. Heracleum (Cow-Parsnip-like).* rhiz. stout, with light 

 brown, silky scales, fronds 3ft. to 6ft. long, 2ft or more broad, 

 with a cordate lobed wing, jin. broad, at the base ; upper part 



