76 Hygrobiella 



ramosi — interdum subbracliiati ; aliis ramis lateralibus, basi apbyllis 

 superne foliosis, aliis (inferioribus) posticis nudis flagellaribus et radi- 

 cal! tibus ; radicellis nullis vel perraris. Cellules caulis diametri 6 vel 7, 

 corticales 20-seriat8e subquadratse, internis pei'xoaulo majores, primum 

 magis pellncidse, in setate opacse. Folia caulis ramorumque inferiora 

 dissita minuta erecta appressa (exinde segve visibilia) ovato-quadrata, 

 complicata — arte explanata subcuneata — ad ^ bifida, lobis acutis ; 

 superiora abrupte multo majora, confertiora et equitantia, in bracteas 

 transeuntia ; cellules minutae subquadratae leptodermes subpellucidse. 

 Foliola omnino nulla. Flores terminales, in ramo saepe iteratim 

 innovando-prolifero, innovationibus lateralibus, raro posticis, interdum 

 binis oppositis elongate. Bractece pro plantula magnse, 2 — 3-jug«, 

 distichfe, arete conduplicatse et eequitantes, carina recta ad angulum 

 45° e caule extante, intimse maxima, foliis caulinis 4 plo majores, quad- 

 rato-oblongEe, basi subcordatae, apice vix ad \ usque bifidse, lobis obtu- 

 satis, raro subacutis ; exteriores sensim minores in folia transeuntes. 



Perianthia semiemersa, oblonga, a facie subcompressa, valde obtuse 

 trigona (angulo tertio postico) antice profunde unisulca — demum proba- 

 biliter subplana, apice lato rotundata, ore parvulo denticulata vel setu- 

 losa, setulis 1 — 4 cellulas longis. Ceetera baud visa. — Folia '12 x "08 

 et minora; cell, j/q^; bract, int. lobus posticus "43 x -25 i I. anticus -4x2: 

 per -65 x 35 mm_ 



Jungermania mijriocarpa Carr. in Trans. Bot. Soc. Edinb. 1880, p. 

 466, t. 18, f. 4. 



Hah. Creeping among spongy peat, along with H. laxifolia, in 

 crevices of moist rocks, in a stream from Ben Venue, Scotland (Car- 

 RiNGTON ! July, 1876). Lane/dale, Westmorland : pi. Q c. per*; and Cloc/- 

 ivyn dwr Arddu, N.Wales : pi. cf (w. h. peakson ! June — Aug. 1881). 



This curious little plant differs from H. laxifolia in the total absence of underleaves 

 and in the dense reticulation ; but in most other respects it is a miniatuie counterpart 

 of that species ; and they agree so perfectly in habit and in all essential characters 

 that I can hardly doubt they should stand in the same genus. I have cut trans- 

 verse sections of several perianths of H. myriocarpa, and have found them uniformly 

 trigonous, with the third angle at the back, as in H. laxifolia and in all Cephalozice. 

 The furrow along the middle of the upper face of the perianth, with a slight ridge or 

 keel on each side of it, quite corresponds to what is seen in immature, or unfertilised, 

 perianths of several Cephalozice ; in their case it is nearly always flattened out at 



