1*26 ttJEPATICJE. [Jungermannia. 



broader branched the margin sinuated. J. sinuata, Dicks. Cr. 

 Fasc. 2. p. 16. — Dill. Muse, t. 74. /. 44. — y. palmata ; short 

 dense upright, fronds branched in a somewhat palmated manner. 

 J. J areata, Hedw. 



Wet places, upon heaths., in marshes and by the sides of ditches ; 

 both a. and /3. — y. mostly on decayed stumps of trees. Fr. Spr. — Allied 

 to the preceding, but truly distinct. Its fronds are far narrower, evi- 

 dently reticulated, equally compressed on both sides, and the calyptra 

 is tuberculated- 



b. Fronds furnished with a nerve or costa. 



* Perianth single. 



77. J. Blasia, Hook, (flask-bearing Jungermannia); frond ob- 

 long submembranaceous dichotomous costate with scattered 

 toothed scales below, fruit arising from the upper side of the 

 costa, perianth and calyptra within the frond. Hook. Br. Jung. 

 t. 82, 83, and 84. Hobs. Br. Mosses, v. 1. n. 109. Lindenb. Syn. 

 Hepat. p. 96. — Blasia Hookeri. Corda in Sturm DeidschL Fl. 

 cum Ic. — Blasia pusilla, Linn. Sp. PL p. 1605. E.Bot. 1. 1328. 

 —Dill. Muse. t.3].f.7. 



Moist heaths, on sandy ground occasionally inundated; not uncom- 

 mon in the mountainous and subalpine parts of England, Scotland and 

 Ireland. Fr. (rare) March and April. — This is a truly extraordinary 

 plant, of which ample details are given in the Monograph of British 

 Jungermannia quoted above. Anthers? oblong and reticulated are im- 

 bedded in the costa. Gemmce of two kinds are found : the one con- 

 tained in a hollowed receptacle within the nerve, having a long tubular 

 beak. These are pale green, globose, reticulated, having a fibrous radi- 

 cle, and, when ready to escape, flowing in considerable numbers through 

 the mouth of the tube. The 2d kind consists of small almost black 

 sphserical masses of a granular or pulpy substance, appearing within the 

 epidermis on the underside of the frond, often covered by the scales. 

 The pistils of the female flowers are seen upon the nerve, on the out- 

 side of the frond, quite exposed. In a more advanced stage, the ferti- 

 lized pistil is found in an oval cavity within the substance of the frond, 

 and surrounded by a membranous bag or perianth, whose summit is at- 

 tached to an umbilicus on the upper side of the closed cavity. At 

 length, the frond bursts with an irregular opening near the extremity, 

 and the calyptra in part, and the capsule and elongated peduncle entirely, 

 are protruded. Spiral filaments of a double helix. Seeds of 2 to 4 

 grains combined together and enveloped in a pellucid membrane. — The 

 late Mr. Hobson discovered this species with fructification near Man- 

 chester; and Mr. Wilson finds it near Aber, N. Wales, and in Dela- 

 mere Forest, Cheshire. 



78. J. epiphylla, Linn, (broad-leaved Jungermannia^); frond 

 oblong submembranaceous irregularly divided obscurely costate 

 the margin entire or somewhat lobed and sinuated, fruit from 

 the upper side of the frond and near the apex, perianth subcy- 

 lindrical plicate, the mouth somewhat dilated inciso-dentate, 

 calyptra exserted smooth. Linn. Sp. PL p. 1602. E. Bot. 

 t. 11 \. Hook, Br. Jung. t. 47. Hobs. Br. Mosses, v. 1. n. 108. 



