Benedict: Revision of the genus Vittaria 407 



The margins are also usually sharper than those of V. stipitata, 

 and the sporangia are borne in shallower grooves. 



7. Vittaria Williamsii sp. no v. 



Rhizome erect, 0.5-1 cm. long, 2-2.5 mm. thick, unbranched, 

 radially symmetrical, the scales small, lanceolate, blackish- 

 costate at the base. Leaves 1-3, 25-70 cm. long, rather thick and 

 rigid when dry, the petiole 10-15 cm. long, hard, terete or nearly 

 so at the base, soon becoming flat and angled, hollow above the 

 base, atropurpureous or green along the anterior ventral portion 

 of the stipe, the lamina linear-lanceolate, 8-14 mm. broad, nar- 

 rowed gradually both ways from the middle, plane or somewhat 

 recurved, the apex somewhat acuminate, the margin thin, sharp, 

 plane, the lower dorsal surface marked with a median purplish 

 stripe extending up from the petiole: leaf -trace one, dividing in 

 the base of the petiole, the midvein not evident on the surface, 

 the veinlets not evident on the surface, intersecting 1.5-2 mm. 

 apart, the areolae about 2 mm. broad, linear-rhomboid with the long 

 axes at an angle of about 15 to the midvein ; sporangia in a straight 

 or slightly sinuate line, about I mm. from the margin, in an open 

 very shallow groove. (Plate 20.) 



Type from Bolivia, Santa Ana, altitude 1,800 meters, R. S. 

 Williams 1349, 29 Jl 1902. 



Also collected at Yungas, Bolivia, altit. 1,300 m., H. H. 

 Rusby 339. 1885. 



It is always a pleasure to work with Mr. Williams's specimens 

 owing to the excellence of their preparation. The present species 

 is no exception. It is as well distinguished from the other species 

 of this subgenus as is V. latifolia also collected by him. Its asso- 

 ciation is, however, clearly with the species of the stipitata alliance 

 of which it is the broadest example. 



Species inquirenda 



Vittaria Bommeri Christ, Bull. Herb. Boiss. II. 5: 11. 



I have seen a fragment of the original specimen of this species 

 through the kindness of His Highness, Prince Roland Bonaparte, 

 in whose herbarium it is deposited. I have not, however, enough 

 to determine certainly the specific characters, although it appears 

 to be close to V. Gardneriana Fee. 



