598 



Proceedings of the Royal Irish Academy. 



Involucre polyphyllous, bracteolse imbricated, 

 undivided. Colesule sessile, round, tri- 

 sulcate, mouth denticulate, . . . Hasxigophoba. 



Involucre polyphyllous, bracteolte much cut 

 and connate at base. Colesule grant- 

 ing. Capsule 4-valved, smooth, of thick 

 texture, ...... Heebeeta. 



Involucre polyphyllous, bracteolae imbricated 

 all round, palmately cut. Colesule sessile, 

 roundish, denticulated at mouth, . . Ais'thelia. 



Involucre polyphyllous, bracteolse imbrica- 

 ted, articulately ciliated. Colesule sessile, 

 erect, roundish ovate, mouth clothed with 

 long acute cilia, ..... Blephaeostoma 



Sub-tribe 6. JrxGEEiiAxxrE^. 



Involucre diphyllous, segments bilobed, 

 conduplicate. Colesule dorsally com- 

 pressed, mouth truncate, bilabiate, at 

 first decurved. Elaters bispiral, attached 

 to centre of the valves, .... 



Involucre oligophyllous, segments bilobed, 

 margin entire. Colesule sessile, erect, 

 round, mouth denticulate. Capsule coria- 

 ceous, ....... 



Involucre diphyllous, bracteolse convex, 

 undivided. Colesule laterally compressed, 

 mouth oblique, truncate, toothed or 

 fringed. Elaters bispiral, thread-like, 



In volu oral bracts two, connate at base. Colesule 

 ovate oblong, laterally compressed. Capsule 

 4-valved, of thick texture, 



Involucral bracts several, cut and bifid, dis- 

 tinct from the cauline leaves. Colesule 

 terminal on stem or short branches, 

 tubulose, more or less plaited, laciniated 

 and contracted at mouth. Calyptra free 

 within the colesule, .... 



Involucre polyphyllous, bracteolse forming 

 an urceolate receptacle, connate with 

 the colesule and connecting tissue of the 

 thalamus, .... . . 



Involucral bracts double, larger than cauline 

 leaves, inclosing the immersed calyptra. 

 Colesule wanting, ..... 



SCAPAXIA. 



DrPLOPHTLLUir. 



PlAGIOCHIEA. 



IIylia. 



JlTNGEEJIAlOrU.. 



Xaedia. 



Cesia. 



