356 48. POLYPODIUM, PHYMATODES. 



A**. Under surface matted or furfuraceous. Sp. 313-318. 



313. P. (Phym.) percussum, Cav. ; rhizome wiry, wide-creeping, the scales 

 lanceolate, adpressed, deciduous ; st. 2-3 in. 1., distant, firm, erect ; fr. 6-12 in. 1., 

 f-1^ in. br., entire, narrowed gradually towards both ends ; texture very cori- 

 aceous, rigid ; under side with fine scattered scales; areolce fine, distinct, free 

 veinlets few and short ; sori round, distinctly immersed, forming a row midway 

 between the midrib and edge. Hk. Sp. 5. p. 56. Fil. Ex. t. 59. 



Hab. Columbia to Peru and Brazil. 



314. P. (Phym.) lanceolatum, Linn. ; rhizome wiry, wide-creeping, the scales 

 lanceolate, adpressed, bright-ferruginous ; st. distant, 1-3 in. 1., firm, erect ; fr. 

 3-9 in. 1., -f in. br., narrowed gradually to both ends ; texture coriaceous ; both 

 sides, especially the under one, more or less thickly coated with fine peltate scales ; 

 veins immersed, hidden ; areolce without free veinlets ; sori larue, uniserial, 

 immersed, often reaching from the midrib to the edge. P. lepidotum, Willd. 

 Hk. Sp. 5. p. 56. PLeopeltis ensifolia, Hk. Ex. Fl. t. 62. 



Hab. West Indies and Panama to Brazil, Araucania, and Juan Fernandez, Sandwich 

 Isles, Neilgherries, Mascaren Isles, Zambesi-laud, Cape Colony, St. Helena, Guinea Coast. 

 A well-marked plant, with a long list of synonyms. The most remarkable form is 

 P. polylepis, Roem., in which the scales are so dense as to quite cover the under surface. 



315. P. (Phym.) linearifolium, Hk. ; rhizome wide-creeping, densely clothed 

 with secund fibrillose ferruginous scales ; fr. sessile, 3-4 in. 1., 1-1^ lin. br., blunt, 

 ligulate, entire ; texture subcoriaceous ; upper surface slightly, lower densely 

 coated with loose woolly tomentum ; areolce in 2 irregular rows, without main 

 veins ; sori in a single row on each side of the midrib. Hk. Sp. 5. p. 53. 2nd 

 Cent. t. 58. 



Hab. Tsus-Sima, Wilford, 862 ; Formosa, Oldham, 54 ; Peel Island, Korea, Oldham, 

 1048. 



316. P. (Phym.) glabrum, Mett. ; rhizome woody, wide-creeping, the scales 

 linear, bright-ferruginous ; st. \-\ in. L, firm, wiry ; fr. nearly uniform, 4-6 in. 1., 

 J-| in. br., ligulate, entire, the point bluntish, the base narrowed gradually ; tex- 

 ture very coriaceous ; under surface coated with thin dirty-white tomentum ; veins 

 hidden ; sori marginal, confined to the upper part of th'e frond, soon confluent so 

 as to form a ridge on both sides extending from the midrib to the edge. P. rupestre, 

 Hk. Sp. 5. p. 46. (in part}. P. acrostichoides, Sieb. (non Forst.}. 



Hab. East Australia, Norfolk Island, Lord Howe's Island, New Caledonia. Very 

 near the next species, but smaller in size, and the sori more confluent. 



317. P. (Phym.) angustatum, Sw. ; rhizome stout, wide-creeping, clothed with 

 whitish, linear, deciduous scales ; st. 2-4 in. L, strong, erect ; fr. 6-12 in. 1., ^-1^ 

 in. br., ligulate, entire ; texture very coriaceous ; upper surface naked, lower clothed 

 with adpressed cottony subferruginous tomentum ; veins hidden ; sori large, pro- 

 minent, in rows near the edge of the contracted upper part, and sometimes 

 confluent. Hk. Sp. 5. p. 44. G. F. t. 20. Niphopsis, J. Sm. 



Hab. North India to Tahiti and N. S. Wales. 



318. P. (Phym.) samarense, Mett. ; rhizome firm, wide- creeping, clothed with 

 deciduous spreading white linear scales ; st. 1-4 in. 1., firm, erect ; fr. 1-2 ft. 1., 

 ^-f in. br., quite entire ; texture coriaceous ; upper surface naked, lower densely 

 coated with dirty- white or greyish- ferruginous tomentum ; veins hidden ; upper 

 half of {he frond contracted, the dense thick sori quite confluent, and occupying 

 the whole surface. Mett. Polyp, p. 123. 



