428 A. W. Evans — Ilainaiian HepaticcB of the Tribe Juhidoidem. 



Hawaiian plant, and this, together with the peculiar underleaves, 

 will serve to distinguish it from certain South American species, 

 which it otherwise somewhat resembles. 



2. Harpalejeunea Owaihiensis (Gottsche). 



Lejeunea Oioaihiensis Gottsche; G. L. & N. Syn. Hep. 351. 1845. 

 Lejeiinea {Strepsi- Lejeunea) Owaihiensis Steph, Hedwigia, xxix, 74. 



1890. 

 Strepsilejeunea Oioaihiensis Steph. Bull, de I'Herb. Boissier, v, 842. 



1897. 



Plate L., figs. 10-14. 



Plants yellowish : stems sparingly and irregularly pinnately 

 branched : leaves somewhat imbricated, the lobe Avidely spreading, 

 broadly ovate, abruptly apiculate or acute, very rarely obtuse at the 

 apex, margin minutely crenulate from projecting cells and sometimes 

 sparingly and indistinctly denticulate ; lobules more or less covered 

 by the underleaves, inflated, triangular-ovate, the keel very slightly 

 arched, free margin involute and almost straight in inner half, lunate 

 at apex with a sharp apical tooth : underleaves broadly orbicular, 

 not overlapping, slightly cordate at base and attached by a some- 

 what curved line of insertion, bifid one fourth to one third with 

 acute lobes and broad, lunulate sinus, margin minutely crenulate from 

 projecting cells : l6af-cells rather thin-walled, without trigones. 



Stems O.!™"" in diameter, lobes of leaves 0.45x0.35™", lobules 

 0.08x0.07"''°, underleaves 0.25x0.28™"', cells at edge of lobe 13/x in 

 ■diameter, in the middle 16/x, at the base 19 x 16/a. 



Hawaii (Menzies), 



The above description is drawn from a portion of the original 

 material kindly sent me by Dr. Hennings of the Royal Botanical 

 Museum at Berlin. The specimens examined are all of them sterile, 

 and it is probable that Gottsche himself did not see the perianths. 

 The $ inflorescence, however, is described in the Synopsis as follows : 

 "fructu ad basin raraoruna sessili, foliis involucralibus amphigas- 

 trioque dentatoserratis, illorum lobulo magno truncato." Spruce 

 compares this species with his Lejeunea {Harjxi- Lejeunea) pilifera^ 

 of South America, but this latter plant is amply distinct in its cus- 

 pidate leaves and much smaller underleaves. 



* Hep. Amaz. ei And. 170. 1884. 



