454 A. W. Eoans — Hawaiian Hepaticce of the Tribe Juhuloidem. 



tinuous with postical margin of lobe, free margin of lobule slightly 

 involute near base, bearing an obtuse tooth ending in a single cell at 

 about the middle, and between this and the end of the keel, bearing 

 a larger, broad, obtuse or subacute tooth ; stylus three to six cells 

 long, often two cells broad at and near the middle : leaf-cells thin- 

 walled, hyaline cells at apex in one to three rows. 



Stem 0.08 in diameter ; lobes of leaves 0.6 x 0.35™"", lobules 

 0.25 X 0.2™'", cells at edge of lobe 14/x, in the middle 17/a, at the base 

 26 X 14/.1. 



On bark of Aleurites Mollucana. Oahu : Nuuanu (Cooke). 



Cololejeunea longistylis is at present known from sterile material 

 only, but it is so different from the other Hawaiian species that it 

 can be easily and surely distinguished. It resembles C lanciloba in 

 having hyaline marginal cells, but these are limited to the apical 

 region of the lobe ; in general appearance too it approaches C. cea- 

 tocarpa, but in this species the leaves are widely spreading and the 

 lobule is different in shape ; the most important character, however, 

 which distinguishes it not only from these two species, but from all 

 the others, is the multicellular stylus. A very close ally of C. longis- 

 tylis isC. stylosa (Steph.)*, from the island of Luzon. This plant has 

 likewise hyaline cells at the apex of the lobe and a multicellular 

 stylus, but its leaf-lobes spread more widely and are more pointed 

 and the lobules are very different in shape. C. sti/losa is also known 

 in sterile condition only. 



16. COLUROLEJEUNEA (Spruce) SeMffn. 



Colura Dumort. Receuil d'obs. sur les Jung. 12. 1835. (not Coluria 



R. Br.). 

 Lejeunea subgenus Coluro-Lejeunea Spruce, Hep. Amaz. et And. 303. 



1884. 

 Colurolejeunea Schiffn.; Engler & Prantl, Nat. Pflanzenfam. i^, 121. 



1893. 



Plants small, pale or yellowish-green, scattered or forming small 

 tufts : stems irregularly pinnate, closely appressed to substratum : 

 leaves ascending, squarrose, attached by a very narrow base and 

 ending in a variously shaped hollow sac, derived from the lobef and 

 in many cases closed by a valvular arrangement ; lobule small, 

 margin strongly involute and enclosing a canal leading to the apical 

 sac : underleaves doubled, deeply bifid with subulate lobes : $ inflo- 



* Hedwigia, xxvii, 289. pi. 11. f. 9, 19-17. 1888. 



t Cf. Goebel, Organographie der Pflanzen, 286. 1898. 



