A. W. Evans — Hawaiian Tlepaticm of the Tribe Juhuloidece. 417 



1. Platylejeunea baccifera (Tayl.) Steph. 



Lejeunea trans v ersalis, fi, Hookeriana G. L. & N. Syn. Hep. 311. 



1845. 

 Phragmicoma baccifera Tayl. Lond. Jour. Bot. v, 387. 1846. 

 Marchesinia baccifera Trevis. Mem. reale 1st. Loinb. di Sci. e Lett. 



III. iv, 405. 1877. 

 Platylejeunea baccifera Steph. Hedwigia, xxix, 6. 1890. Also in 



herb. 



Plate LXVIII., figs. 7-11. 



Dioicous : plants brown : stems sparingly and irregularly pinnately 

 branched : leaves imbricated, the lobe ovate, slightly convex, some- 

 what decuived at the rounded or very obtuse apex, arching over the 

 axis but scarcely beyond, slightly or not at all cordate at base, entire 

 or rarely obscurely crenulate at apex; lobule triangular-ovate (when 

 explanate), much inflated near axis, keel strongly arched, often some- 

 what decurrent, free margin entire, very strongly involute near base, 

 plane and almost straight in outer half: underleaves imbricated, 

 broadly reniform, plane or nearly so, attached by a sharply curved 

 line of insertion and abruptly short-decurrent or indistinctly cordate 

 at base, apex broadly truncate or retuse, mai'gin entire or sparingly 

 and obscurely crenulate: leaf-cells with large tiigones and occasional 

 intermediate thickenings, often becoming confluent : ? bracts sub- 

 equally one fourth to one third bilobed, lobes and lobules ovate to 

 oblong, rounded to subacute, entire or very obscurely crenulate at 

 the apex from projecting cells ; bracteole obovate from a narrow 

 cuneate base, shortly bifid (about one twelfth) with obtuse lobes 

 and sinus, entire; perianth (very young) compressed, dentate on 

 lateral keels : ^ inflorescence not seen. 



Stems 0.25""" in diameter, lobes of leaves 1.7 x 1.1'"'", lobules when 

 inflated 0.35x0.25""", underleaves 0.9 x 1.5'"™, leaf-cells at edge 22/u, 

 in diameter, in the middle 2n/;t, and at the base 35/x,, lobe of outer 

 bract 0.95 x 0.5^"™, lobule 1 x 0.4'""^, bracteole 0.9 x 0.6""". 



Hawaii (Menzies). 



The above description is drawn from a specimen kindly given me 

 by Herr Stephani, which fully agrees with the material at Kew. 

 Platylejeunea baccifera is very close to P. transversalis (Swartz) 

 Schiffn., but is apparently still closer to P. granulata (Nees) (Lejeu- 

 nea toiniopsis Spruce), also of tropical America. It is distinguished 

 from the first of these by its smaller lobules and by the narrower bases 

 of its underleaves. It differs from the second in its broader under- 

 leaves, and there are apparently slight differences also in involucre and 



