426 Scientific Proceedings, Royal Dublin Society. 



GrESNERACE^. 



Gesnera insignis. — Hairs distributed over filament ; pluricellular ; 

 rather large ; thin walled ; knobbed at the extremity ; glandular ; 

 terminal cell subdivided into several by perpendicular septa, and 

 filled with dark coarsely-granular protoplasm (pi. xx., fig. 11). 

 Diameter '0010 in, 



Eucodonia sp. (garden hybrid). — Hairs pluricellular, knobbed, 

 but not glandular ; more slender than in the last ; wall delicate. 

 Diameter -0008 in. (pi. xx., fig. 10). 



Aeschynanthus splendens. — Hairs scattered over filament, resem- 

 bling those of Gesnera insignis, but smaller ; pluricellular ; glan- 

 dular terminal cell, divided by perpendicular septa, as in G. in- 

 signis, septa fewer in number. Diameter •0007-8 in. (pi. xx., 

 fig. 9). 



Apgcynace^. 



Nerium oleander. — Hairs clothing filament with a soft woolly 

 coating ; very slender ; unicellular ; wall well marked ; rugose, 

 with minute oblique warts. Diameter '0008 in. (pi. xix.,fig. 9). 



RUBIACE^. 



Toxico])Jilcea spectahilis. — Hairs of two kinds — [a] on anther ; 

 unicellular ; rather short ; flattened ; slightly rugose, with ex- 

 tremely minute papillae ; diameter '0008 in. ; {h) on filament 

 longer, but unicellular ; subulate ; obtuse, with one or two slight 

 swellings of the cell wall ; partly filled with large rounded 

 granules. Diameter about '0008 in. Similar hairs occur on the 

 corolla tube. 



Vinca major. — Hairs on extremity of anther and at base of 

 filament, where it is inserted into the tube of the corolla; both 

 unicellular ; surface faintly undulated. Those on the anther, with 

 thinner walls and longitudinally striate. Diameter -0008. Those 

 at base of filament with stronger walls, also striate, and with -very 

 granular protoplasm. Diameter '0010. Pollen smooth. 



Vinca minor. — Hairs very similar, both as to form and arrange- 

 ment, to those of V. major, but outline of anther hairs more 

 undulated and scarcely striate. Diameter •0008-"0010. Pollen 

 smooth, with three or four projections. Basal hairs less undulate 

 but more striate. 



