MAXON tSTllDlES OF TROPK^AL AMERICAN FERNS. 501 



cm. long), simplo. liiu'iir, l.ui^'-aUeniinte, straiprlit *>r nearly so, jjjnulually taper- 

 ing from tlie nnequally suhcordate base (8 to 10 nun. broRd), Uie lowermost 

 yhort-stalkoa (2 to ;j nun.), (lie middle ones less so, the upper sessile, the ter- 

 minal se;;ment 7.5 cm. long, conform, sessile; costa evident throngliout; veins 

 concealed, close, 2 or ?> times dicliatomonsly forked, extending to tl)(^ thick 

 whitish narrowly (^ai'tila^Mnous tnargin; mar^^ins broadly revolnte, the sori 

 borne in n continnous broad l>and from the free nnicronatc lip of the pinna 



nearly to tiie !iase on l»oth sides. 



Type in the T'. S. National Ili^rbarimn, no. 57222;*^ collected by Dr. Edward 

 Palmer, near ^'ie(oria, altitnd<^ aliont :;2n nu-ters. State of Tamanlipas, Mexico. 

 February U> April, li)07 (no. %\\). Only one specimen was found, this fortu- 

 nately in j^ood condition. 



1lie long, simple, entire, spaced pinn;o will distinguish PilUua uotuhUls at 

 once from any known species of the groui> characterized by light-colored stipes 

 au<l rachiscs. 



Phymatodes prominula Max<in, sp. nuv. 



IMiizome extensively creeping, slender, 1.5 to 2 mm. in diameter, thickly 

 covered with appresse<l ferruginous firm lanceolate scales terminating In a long 

 si'ta, the margins lightei'-eolored with tiaccid deciduous cilia ; fronds essentially 

 conform, exstipitate, coriaceous, glabrous, entire, 7 to 12 cm. U)ng, 11 to IT, mm. 

 broad, linear-laneeolate to oblanceolate, the apex snbobtuse or acutisli (rarely 

 attenuate), the lower portion gradually attenuate to the base, tluis narrowly 

 cuiieate; prineipal vi-nation manifest, the costa and lateral veins elevated, the 

 connecthig ntul hielnipMl veinlels scarcely so or immersed; in sterile fronds llie 

 costal areoles narrow, the paracostal larger and extendhig nearly to the margin; 

 in tlie fertile fronds the costal and paiacoslal areoles of nearly e4pial size, the 

 latter soriferous; recurrent included veinlets few, short, immersed; ultimate 

 venntkm comprising a nunor third row of ineonii.lete areoles near the margin; 

 sori solitary, medial, IS to 2:; pairs, impressed, borne at the end of a single 

 branch or at the ends of two branches short-excurrent from the costal areole; 

 si)ores light yellowish brown, nuu'icate; !iarai)hyses liliform, llaccid. 



Type in the U. S. National Ib^-barium, no. 531irv2; collected on the San Juan 

 trail, island of Margarita, ViMiezuela, altituile SOU meters, by J. 11. Johnston 

 (no, 155), July 6, ItMKJ. liepresented also by Feiidler^s no. 50 from Trhndad 

 and by specimens collected by ('harles Wriglit at (Jreytown, Nicaragua (without 



number). 



This is one of the forms usually called rnlifpodnnn HalicifoUmn Willd.,^ with 

 which species as delinnted by Metteiuus'^ it may be identical; but this name. 

 Ihougli used recently by IIien»nymus,^' is not tenable, having been used by VaM 

 for anotlHM- species in 1S07. Of the several supposed synonyms associated with 

 ''s^aliciff^innr' as a species or as a subsi-ecies of Ji/voifodloldcs none appears to 

 be available. Pol ij podium -^uriitamcttsr Jacq..^ as interpreted by Lindman," 

 difTers in all essential respe<-ts, as does also Cra.sifcdarla gnnidis YvoJ \\kA\\ 

 of these have dimorphic fnmds. i*idijp<)duim divUjophijUHm Kunze, from 

 Guiana, is from deseri])lion chsirly a distinct speeies, as reeognized l»y Met- 

 tenius.^ 1\ ro^^mariiiiff^liKHi Kunth is an allitMl r:euadorean plant whose char- 

 acters havi^ recently been pointed out hy llieronymns/ 



^Sp. ri. 5: 14n. ISlo. 



^Abhnnd. Senck. Nat. (Jesell. 2:lMi. lS5tj, 



^Kngler's F»ot. Jnhrb. 34; 5;Ui, 11)05. 



^Coll. r>ot. 3:2S5, [d. 2t. f. '/. 17S1). 



^Ark. Hot. 1: 247. l!^o;i. 



^ Crypt. Vase. r,res. 1:11!* id. JT. A :t, \s{VX 



