Mr. Hassall on the Structure of the Pollen Granule. 555 



each granule, which issue in pairs opposite to each other. See 

 PI. XVI. fig. 91. 



Epacris grandiflora. 

 Ericaceae. 



Pollen granule resembling that of the preceding order. 



Kalmia latifolia. Gaultheria Shallon. 



Azalia indica. Arbutus Unedo. 



Rhododendron ponticum. Andromeda multiflora. 



R. maximum. Menziesia Daboeci. 



R. caucasicum. Erica multiflora. 



Sedum latifolium. E. vulgaris. 



Gaultheria procumbens. 

 Pollen granule cylindrical, three-lobed. 



Clethra ferruginea. 



Brexiace^e. 

 Pollen granule cylindrical, three-lobed. 



Brexia spinosa. 



CURVEMBROS^, 

 NyCTAGINACEjE. 



Pollen granule very large, spherical ; extine perforated with from 

 forty to fifty apertures. See fig. 92. 



Mirabilis Jalapa. 



TUBIFEROS^E. 



Proteace^e. 



Pollen granule elongated, curved, furnished with three membranes; 

 pollen tubes two, one from each extremity of the granule. See fig. 93. 

 Dryandra formosa. Banksia verticillata. 



D. longifolia. B. speciosa. 



D. armata. 



Pollen granule furnished with three membranes ; triangular pollen 

 tubes three, one from each angle. See fig. 94, 95, 96, 97, 98. 

 Lambertia formosa. Grevillea sulphurea. 



Hakea pedunculata. Anadenia Manglesii. 



H. pugioniformis. Isopogon anemonifolium. 



Grevillea linearis. 



Thymelace^e. 



Cylindrical, three-lobed. 



Pimelea hispida. Daphne Mezereum. 



P. decussata. D. Laureola. 



ACHLAMYDOSiS. 



Salicace^e. 



Cylindrical, three-lobed. 



Salix viminea. 

 Rectembryos^e. 



JuGLANDACEjE. 



Pollen granule spherical ; pollen tubes seven, usually issuing 



2 O 2 



