286 HEPATIC^. 



iii"Eng. Bot. Suppl."tab. 2947 (Oct. 1, 1848) by Dr. Spruce, 

 who discovered it in Eskdale, December 1842. 



Distinguished from Jun^. pumila, With, and Jung. .sjjJiarocarjja, 

 Hook., which are both paroicous, by the insertion and shape of 

 leaves and clavate perianth ; some forms of Jun(/. rijKiria, 

 Tayl. might be taken for lanceolafa, but riparia is always 

 dioicous. 



Description of Plate CXX. — Fig. 1. Plants natural size. 

 '2. Portion of fertile stem x 11 (C. & P. n. 170). 3, 4. Leaves 

 X 16 (ditto). 5-7. Leaves x 24 (Canada, Macoun). 8. Portion 

 of leaf X 290 (C. & P. n. 170). 9, 10. Bracts x 24 (Canada, 

 Macoun). 11. Cross-section of perianth near the middle x 24 

 (ditto). 12. Apex of perianth x 16 (ditto). 13. Portion of 

 the mouth of the perianth x 85 (ditto), 14. Pistilliclium x 85 

 (ditto). 15,16. Perigonial bracts x 16 (ditto). 17. Antheridium 

 X 85 (ditto). 



aenus 30. JAMESONIELLA, Spruce. 

 Jamesoniella, Spruce, Journ. of Bot. (1876). 



Large, showy, csespitose, rosy or pale. Stems often suberect, 

 sparingly and fastigiately branched, flagelliferous, circinnate ; 

 branches postico-lateral. Leaves large, alternate, succubous, 

 laterally appressed, decumbent, remarkably decurrent at the base, 

 insertion oblique, very concave, quite entire or very distantly 

 ciliate or denticulate ; cells small or minute, semipellucid, beauti- 

 fully thickened at the angles. Stipules none or very rare and 

 minute, except near the involucre. Inflorescence dioicous ; ? 

 flowers terminal, with innovations below ; bracts and interposed 

 bracteole much laciniated. Perianth more or less projecting 

 beyond the bracts, towards the apex 6-10-plicate, mouth scarcely 

 denticulate. Capsule, &c., not seen. $ cauline, very often 

 terminal, perigonial bracts equalling the leaves, 2-3 androus. 



