NARDIA. 363 



remarkably incurved margin of the leaves, remove it far from any 

 other of the British species. 



Description of Plate CLVII. — Fig. 1. Phmts natural size 

 (Eng. Bot.). '1. Portion of fertile stem x IG (Clova, Br. 

 Grreville). o, 4. Leaves x l>4 (Ben Mac Dliui, CI. Stabler.) 

 5. Portion of leaf x 290 (ditto). G, 7. Bract x 24 (Clova, 

 Dr. Greville). 8. Perianth x 24 (ditto). 9. Cross-section of 

 perianth, lower portion, x 24 (ditto). 10. Ditto, upper portion 

 (ditto). 11, 12. Portions of the mouth of perianth x 85 (ditto). 

 13. Pistillidium x 85 (ditto). 



Genus 32. NARDIA, Gr. §• Bcjui. 



Jimgermania, Schiad. Syst. Samml. crypt. Gew. 2, p. 4 (1 7'.>7) ; Sm. Engl. Bot. 21 

 (1805); Lyell in Hook. Brit. Jung. t. 03 (1810); Nees Hep. Eur. 1, p. 27.") 

 (1833). 



N'ardia, Gray & Benn. Nat. Arr. Brit. PI. p. C>[)i (1821). 



Meso2)hi/lla, Dum. Comm. Bot. p. 112 (1822). 



Alicularia, Cord, in Opiz Beitr. 1, p. 052 (1820), 



Southhya, Spruce, Muse. Pyr. in Trans. Bot. Soc. Edinb. 5, 3, p. 197 (1850). 



Plants medium size, rarely large, csespitose. Stems prostrate 

 or suberect, simple or furcate, branches proceeding from the 

 postical angle of the leaves, rootlets usually numerous, pale or 

 reddish, flagella absent, except in N. comprcssa. Leaves alternate, 

 succubous, or somewhat close and subtransverse, orbicular or 

 reniform, entire or refuse, very rarely bilobed, margin quite 

 entire ; cells medium size, subquadrate, walls rarely thickened, 

 lumen sometimes filled with chlorophyllose granules. Stipules 

 present, subulate or lanceolate ; in the subgenus Euccdij,v absent. 

 Inflorescence dioicous or paroicous; female flowers terminal, often 

 sterile on innovations. Involucre (in subgenus Eaiiardki) urceolate ; 

 bracts 2-5-pairs, opposite, connate with the bracteole. Perianth 

 (in Einiardia) slightly laterally compressed and concrete with the 

 innermost bracts and connective tissue of the receptacle to form 

 the urceolate involucre, apex free, ovoid or conoid, obscurely 3-5- 

 carinate, apex often at first closed, afterwards dividing into 



