HELOTTO1. 153 



ARRANGEMENT OF THE SPECIES. 



A. Stipitate or suhstipitate. 



(a) Sporidia elliptic. 



(aj On wood . . . . . . species 1 



(/8) On herbaceous plants . . 2, 3 



(7) On catkins . . . . . . 4 



(6) Sporidia oblong-ellipuc. 



(a) On wood .. .. .. ,, 5-11 



(c) Sporidia fusiform or clavate. 



(o) On wood .. .. .. 12-14 



() On herbaceous stems. . .. 15,16 



(7) On leaves and fern-fronds . . 17-22 



(d) Sporidia linear. 



(o) On wood . . . . . . ,,23 



B. Sessile. 



(a) Sporidia oblong or oblong-elliptic. 



(a) On wood ,,24, 25 



(6) Sporidia fusiform or oblong-fusiform. 



(a) On herbaceous stems or twigs 26-28 

 (/3) On cones . . . . . . ,,29 



(c) Sporidia cylindrical. 



(a) On wood . . . . . . ,,30 



(d) Sporidia doubtful . . . . . . 31-35 



KEY TO THE SPECIES. 



A. STIPITATE. 



Hymenium brown . . . . . . . . 1 



Hymen ium yellow . . . . . . . . 2 



Hymenium white . . . . . . . . . 3 



Hymenium dark green . . . . . . . . Arjaricinum. 



'Hymenium hnney -coloured; stem cylindrical, slender mdleum. 



Hymenium pale umber ; stem stout. . . . . . subsessile. 



Hymenium lerruginuous; externally paler. . . . ferrugineum. 



1. ^Hymenium pale brick-red ; stem delicately villous sublater ilium. 

 Hymenium testaceous or ochery pallid ; stem equal, 



paler . . . . . . . . . . . . . . zrtlicellum. 



Hymenium pale yellowish-brown : on Marcliantia Marihantise. 



/'Hymenium bright yellow; externally pallid .. flavum. 

 Hymenium lemon-yellow ; externally the same 



colour . . . . . . . . . . . . citrinum. 



Hymenium pale yellow ; externally pallid : on dead 



leaves . . . . . . . . . . . . sulplmratum. 



Hymenium pale yellow; margin paler: on dead wood pallescens. 



Hymenium pale yellow; margin repand: on Spirxa repandum. 

 2 ! Hymenium pale yellow ; margin acute, repand : on 



\ leaves . . . . . . . . . . . . immutabile. 



Hymenium yellow, dark brown beneath ; stem stout fibuliforme. 

 Hymenium yellow ; margin even, orbicular ; stem 



papilliform . . . . . . . . . . . . lenticulare. 



Hymenium pallid-ochraceous; stem nearly obsolete: 



on grass . . . . . . . . . . . . graminium. 



Hymenium pallid-ochraceous : on leaves . . . . epipliyllum. 



VHymenium egg-yellow ; margin paler, repand . . ilicis. 



