500 rTRIBUTIONS FROM I Hi. NATIONAL HERBARIUM. 



tin- more robust stage of the species, Wright - specimens, of which there arc 



w\<< sheets in the berbariu f Columbia University and one In the I S N 



t tonal Herbarium, as much smaller i>nt fertile.' The bd< i what allied 



mi pctiolatum (Sw.) Urban, originally described from Jamaica, 

 from which it differs conspicuously in its oblique veins, long-tapering frondi 

 (long-attenuate below), In its copious covering of Irregularly stellate a 

 and es|>ecially in the prominent bristly-clllate scales of the rootstock. In com- 

 iii* > 1 1 with /.'. i" i lohit a hi :iinl the Mexican /.'. araiwosum < l ». C. Eaton) C. Chr. 

 it shows a tendency toward an Intermediate position between the two usually 

 well-marked sections "t" the ir« -ini^. as elaborated by I m. rhrist in hi> mono- 

 graph, 



I Klaxon, sp. nov. 



Fronds 15 t<> 25 cm. long, clustered ui>6n an ascending rhizome bearing short 

 dark aclcular scales witb narrow brown borders; stipes I to 9 cm. long (av- 

 eraging 7 or s cm.), light brownish green, with ;i few uarrow scales similar to 

 those of ilic rhizome; lamina 10 to 17..". cm. i« »i nr. 5.5 to s ."» cm. broad, narrowly 

 ovate acuminate simply pinnate slightly broader :it the middle than .-it the 

 rachis like the stipe bearing numerous narrow brownish black-tipped 

 appressed scales; pinnre 7 to 9 pairs, approximate or slightly Imbricate (only 

 the lowermost pair or two somewhat spaced), simple, falcate, the lowermost 

 pair sessile and sometimes Uastate, those above sessile, lanceolate aurlculate, 

 tiie pronounced rounded auricle overlapping the rachis, rounded or Bubcordate 

 below, the uppermost two or three pairs unequally Bubcordute, finally adnata 

 and decurrent, giving rise to an elongate acuminate terminal segnienl once or 

 twice sharplj cleft below; largest pinna' (middle) 1.3 cm. long, 1 cm. broad 

 near the base i l.i cm., Including the auricle), tapering regularly and evenly to 

 an acute apex; texture firm, chartaceous; leaf-tissue covered sparingly both 

 above and below with short whitish glandular hairs; reins close repeatedly 

 forked; sori forming a narrow continuous band completely around the slightly 

 changed margin. 



Type in the I . S. National Herbarium, no. 162684; collected on wet ledges in 

 Iguala can<»n. near [guala, altitude 900 meters, in the state of Guerrero, Mexico, 

 July 23, r.»<»7. by Filemdn L. Lozano, and distributed by Dr. C. G. Pringle as 

 no. 13947. The personal name is given at the suggestion oi" l>r. Pringle, who 

 writes most appreciatively of his friend and assistant. Seuor Lozano. 



Notwithstanding the marked dissimilarity in form, the alliance of P. l<>:<ini 

 is clearly with /'. seemanni, from which it appears to differ sufficiently in its 

 simple pinna', scantier restiture, etc. 

 Pellaea notabilis Maxon, s|>. nov. 



riant about i~> cm. high, comprising • '. long-stipltate simply pinnate fronds. 

 Rhizome stout, i em. in diameter, creeping (6 cm.), very thickly clothed with 

 linear long-attenuate tawny silky chaff <7 to 8 mm. long), that of the apical 

 portion light straw-colored ; stipes clustered. 22 to -27> cm. long, stout, 1.5 mm. 

 in diameter, terete throughout, straw-colored with purplish bases, naked except 

 for a few spreading silky hairs near the base; lamina bluish green, conspicu- 

 ously lighter below, chartaceous, glabrous, l'<> to -'■'> cm. long, i". cm. broad, 

 deltoid-ovate in drying, once pinnate ,; to s pairs of narrow-spaced (2 to 

 ."..o cm. apart i pinna' and a similar terminal segment, the rachis stout, naked, 

 straw-colored; pinna' opposite or subopposite, all of nearly equal size (G to 8 



■ii in the collection of i >. < - . Baton and at Kew : Indicated by Eaton 

 as probably undescribed, ami at Kew placed with /.'. tectum (II. A; B.) Mo.. re. 

 originallj from Venezuela, to whose type specimen, .-is seen in the YVilldenow 

 herbarium at Berlin, it has no dose resemblance. L. M. Underwood, in litt. 



