304 48. POLYPODIUM, EUPHEGOPTERIS. 



B. Exinvolucratse. Sori without an involucre. TRIBES 11-13. GEN. 48-61. 



TRIBE 11. POLYPODIES. 



Sori on the back of the lobes, round or rarely oblong, not more than twice as long 

 as broad. GEN. 48. 



GEN. 48. POLYODIUM, L. (See page 504.) 

 Characters of the Tribe. 



The largest genus, including plants of two different modes of growth, each series 

 including a number of species of each of the different kinds of venation and from all 

 climates. TAB. V. f. 48. 4 



* Desmobryoid series. Habit and mode of growth of Aspidiece, i. e. stems 

 continuous with the caudex, and sori always medial on the veins. Phegopteris, 

 Mett. Sp. 1-90. 



Euphegopteris. Venation of Lastrea, i. e. veins free. Sp. 1-36. TAB. 48. 

 Fig. C. 



* Pinnce entire or lobed less than halfway down to the midrib. Sp. 1-7. 



1. P. (Pheg.) cubanum, Baker ; st. very short, slender, stramineous, pubescent ; 

 fr. 3-4 in. L, 1 in. br., oblong-lanceolate ; pinnae oblong, entire, blunt, 2 lin. br., 

 rounded at the base and stalked, the lower ones reduced ; texture subcoriaceous ; 

 rachis and under side finely pubescent ; veinlets of the pinnae usually simple, with 

 medial sori. P. cordatum, Hk. Sp. 4. p. 233, non Kunze. 



Hab. Cuba. Probably a free-veined form of P. reptans, with which Mettenius 

 unites it. 



2. P. (Pheg.) hastcefolium, Sw. ; st. tufted, 1-2 in. L, wiry, deciduously scaly ; 

 fr. 6-9 in. 1., l|-2 in. br. ; pinnce blunt, entire, in. br., with a sharp distinct 

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

 gradually ; texture subcoriaceous ; rachis villose ; under side nearly naked ; 

 veinlets forked, with the sori below the middle. Hk. Sp. 4. p. 232. 



Hab. West Indies. 



3. P. (Pheg.) flavo-punctatum, Kaulf. ; st. l|-2 ft. L, slightly scaly towards 

 the base ; fr. 2-3 ft. or more L, 12-18 in. br. ; pinnae 6-9 in. 1., 1-1 in. br., the 

 apex acuminate, the edge crenate or inciso-dentate, the lower ones slightly 

 stalked, 2 in. apart, the lowest not reduced ; texture papyraceo-herbaceous ; 

 rachis naked or slightly scaly, both sides naked ; main veins only about 2 lin. apart, 

 with 3-4 veinlets on each side, all except the upper ones uniting ; sori medial. 

 /3, P. Prionitis, Kunze ; pinncB lobed from a quarter to a third of the way down 

 to the midrib. Hk. Sp. 4. p. 239. 



Hab. W. Indies and Mexico to Peru and Brazil. Neph. Imrayanum, Hk. Sp. 4. 

 p. 86. t. 242. A., is evidently the same plant, and I cannot see an involucre. The name 

 is derived from minute pellucid yellow dots, which are scattered over the frond. It may 

 be P. rotundifolium, Willd. (Plumier, t. 38). 



4. P. (Pheg.) Wrightii, Baker ; caudex woody, erect ; basal scales dense 

 brown, lanceolate ; st. tufted, grey, - ft. ; fr. 6-9 in. L, lanceolate, simply 

 pinnate ; pinnce 8-9-jugate, lower largest, stalked, distant, lanceolate-acuminate, 

 2-3 in. 1., ^ in. br. above the auricle, square and auricled on the upper, cuneate- 

 truncate on the lower side at the base, sometimes slightly auricled ; rachis 

 grey, naked ; texture, rigidly subcoriaceous ; surfaces dull-green, naked ; veins 



