3S0 NEW HEPATIC^. 



and so arising from the pinna, short, linear obtuse spikes, 

 parallel with the principal stem. Perichatia usually occu- 

 pying the place of pinna, and so arising from the principal 

 stems. Calyces nearly sessile, having but one or two pairs of 

 pericheetial leaves. Pedicels about twice as long as the 

 calyces. Capsule oblong, split down to the base into four 

 segments. At the inner base of the lobules of the larger 

 leaves a most minute revolute process occurs. This differs 

 from M. navicularis, Nees, if we may trust to the characters 

 given of the latter in the Synopsis Hepaticarum, by the more 

 elongated fronds, acuminated at both ends, by the closer and 

 more attenuated branchlets, by the rotundato-ovate leaves, 

 whose posterior bases are not undulated and crisped, by the 

 less considerable lobule, by the oblongo-ovate stipules and by 

 the wider mouth of the calyx, the denticulations on whose 

 mouth are observable only under a high power of the micro- 

 scope. 



4. M. obtusata, Tayl.j caule laxe csespitoso, adscendente, 

 pinnatoj pinnis alternis, brevissimis, obtusatis; foliis im- 

 bricatis, patentibus, rotundato-rhomboideis, apice sub- 

 acutis, reflexis, margine integerrimis, basi amplexante pos- 

 tice elongata ; lobulis oblongo-ovatis obtusis, hinc gibbis, 

 margine reflexis basi amplexante utrinque elongata j stipu- 

 lis ex ovata basi angustius oblongis, margine reflexis basi 

 utrinque elongatis subdentatisque. 

 Hab. Canaries. Lemann, Hook. Herb. 



Tufts flattish, wide, dusky olive-green. Stems 2-3 inches 

 long. Branches numerous, crowded, very short, erecto- 

 patent. Leaves closely imbricated, the dorsal margin nearly 

 patent, the ventral more rounded and irregularly waved at 

 the base; the lobules and stipules have on each side. of the 

 base a free, waved and toothed process ; the lobule is uncon- 

 nected with the leaf. This species resembles male individuals 

 of Jung. Thvja, Dickson, yet differs by the want of gloss to 

 the foliage, by the more closely pinnated stems, by the 

 shorter branches, and by the more considerable appendages 

 to the lobules and stipules. 



