58 HEPATIC^. 



The only known station. 



Obs. — Distinguished from other native Lejeunece by its rigid 

 stems and the variable character of the postical lobes of the leaves, 

 which are sometimes equal in size to the antical lobes, sometimes 

 about half the size or very minute or entirely wanting. 



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



2. Stem, postical view x 30. 3-5. Portions of stem, postical view 

 x64. 6. Ditto X 85. 7. Portion of leaf x 290. 8, 9. Stipules 

 x85. 10, 11. Bracts X 64. 12. Bracteole x 64. (All Killarney, 



Dr. Carrington.) 



10. Lejeunea calcarea. Lib. 



Lejeunea cakarea, Libert in Bory de St. Vine. Ann. des sc. nat. VI. p. 373, 



n. 1, t. 96, f. 1 (1820). 

 Jungermania hamatifolia, var. echinata, Hook. Brit. Jung. (1816). 

 Lejeunea echinata, Taylor MSS. G.L.N. Syn. Hep. p. 345 (1844). 



Monoicous, intricately caespitose, minute, yellowish-green 

 colour. Stems filiform, subdichotomous or subpinnate, rootlets 

 few, pale. Leaves imbricate, unequally bilobed, antical lobe 

 patent or erecto-patent 40°-30° ovato-acuminate, epidermis echi- 

 nate, papillse small, roundish, texture opaque, cells minute, 4-, 5- 

 and 6-angled, walls firm, no trigones or thickened angles ; postical 

 lobe about half the size of the antical, sfibbous, ovate, free marg-in 

 incurved, smooth or very slightly serrate, texture more delicate, 

 rather larger cells, slightly elongate, epidermis smooth, slightly 

 echinate at the keel. Style or interlobule attached to each leaf 

 right and left of the stem, linear-subulate, 4 or 5 uniseriate cells 

 long. Stipules absent. Female flowers on short branches ; bracts 

 much smaller than the leaves, unequally bilobed, antical lobe 

 ovato-acutate, postical about half the size, widely subulate-acutate, 

 plane. Perianth pyriform, obtusely 5-angled, angles distinctly 

 muricate. Androecia on short lateral branches, perigonial bracts 



3, 4 pairs, closely imbricate, erect, unequally bilobed, swollen at 

 the base, antical lobe oval-acute, postical about one-third smaller, 

 oval ; antlieridia subspherical. 



Dimensions. — Stems about i an inch long, diameter '05 mm. 



