448 A. W. JEvans — Hawaiian Hepaticm of Ihe Tribe Juhuloidem. 



minKtissima are monandrous, but this character, which might seem 

 an excellent differential one, is not constant, as, in an Italian speci- 

 men collected by the author, the bracts are distinctly diandrous. 



II. Subgenus Leptocolea (Spruce) Schiffn. 

 2. Cololejeunea obcordata (Aiist.). 



Lejeunea obcordata Aust. Bot. Gazette, i, 36. 1876. 

 Plate LVIL, figs. 1-6. 



Autoicous : plants yellowish-green, creeping about in tufts of 

 other bryophytes : stems irregularly pinnately branched : leaves con- 

 tiguous or subimbricated, the lobe widely spreading, ovate from a 

 very narrow base, rounded at the apex, subentire or indistinctly cren- 

 ulate and angular-dentate, antical margin curved, postical mar- 

 gin almost straight ; lobule inflated, ovate, keel slightly arched, free 

 margin involute and entire near the base, rounded above and bear- 

 ing two or three small teeth ; stylus a single cell, often obsolete : 

 leaf-cells with thickened walls, trigones and intermediate thicken- 

 ings consjiicuous and often confluent : $ inflorescence borne on a very 

 short branch, innovating on one side with a short sterile innovation; 

 bracts bifid, the lobule a little smaller than the lobe, both divisions 

 ovate to oblong, rounded at the apex, subentire ; perianth cuneiform, 

 deeply emarginate and with a short and very indistinct beak at 

 bottom of depression, strongly compressed, the two lateral keels 

 extending upwards as widely spreading, rounded and more or less 

 denticulate projections, antical surface plane, postical surface with a 

 broad, low keel, both surfaces smooth : $, spike occupying a short 

 branch, globose to oval, bracts in one to three pairs, imbricated, 

 strongly inflated, unequally bifid with entire lobes. 



Stems 0.05"'™ in diameter, lobes of leaves 0.55x0.35™°', lobules 

 0.2x0.15™™, cells at edge of leaf 20/a in diameter, in the middle and 

 at the base 25/^, lobe of bract (a) 0.5 xO.3™™, (b) 0.35x0.25™™, lobule 

 (a) 0.45x0.3™™, (b) 0.3x0.2™™, perianth 0.8™™ long, 0.7™™ wide in 

 broadest part. 



Creei^ing among other bryophj^tes. Oahu : Konahuanui (Cooke). 

 Austin simply refers the plant to the "Sandwich Islands" and does 

 not give the collector's name. 



Cololejeunea obcordata, although closely allied to the following 

 species, may be at once distinguished from it by its firmer texture, 

 the leaf-cells having thick walls and very conspicuous trigones, by 

 the position of the $ inflorescence and by the widely divaricate lobes 



