74 



POLLEN. 



lowfovillae, connected by a thin 

 circular plate. b. somewhat 

 opening out in oil ; unaltered in 

 water. 



52. Larix communis, L. (g^) : 

 globular rough, with 3 pores. 

 b. in oil more transparent, c. 

 in vinegar with oily blots dif- 

 fused ; in water globular and 

 clouded. 



OOETLACEJ5. 



53. Corylus avellana, L. (g^) : . 

 when fresh globular, but rapidly 

 becoming poly hedric, with penta- 

 gonal facets with a pore in each. 

 b. in vinegar, c. in oil. d. in 

 water. 



54. Carpinus Betulus, L. (g^j) 

 opaque, globular, b. with 3-loop 

 openings, with a pore in each. 



a. 



65. Quercus cerris, L. (-^) : 

 oval, with 3 bands and slits, the 

 bands minutely fitted, b. in 

 vinegar somewhat 3-cornered. 

 c. in water subspherical, with 

 the remains of 3 pores. 



56. Fagus sylvatica, L. (|) : . 

 broad, oval, with 3 slits, b. seen 

 endwise. 



57. Cytinus hypocystis, L. (^f^) : 

 a. oval, with a pore. b. united 

 in 4 pairs, c. globular in water. 



ARISTOLOCHIACE^J. 

 68. Arisiolochia clematitis, L. ( 

 a. opaque, rough globular, 



bands visible in oil. 

 gar. 



b.2 

 c. m vine- 



59. Aristolochia brasiliensis, Matt. 



and Z. ( 6 QQ~ ) : globular rough. 

 b. in vinegar with delicate work- 

 ings on the edge. 



EUPHORBIACEJS. 



60. Euphorbia bupleurifolia, Jou. 



(~^ ; shining, yellow, elliptic, 

 with 3 slits ; in water globular 

 clouded. 



61. Painsettia pulcherrima ( gQjr ) 5 

 oval, rough, with 3 slits ; in oil, 

 with a margin from the rough- 

 nesses. 



62. Mercurialis perennis, L. (^|) : 



a. smooth, elliptic, with 3 slits. 



b. in oil. c. end up. 



63. Croton humUis, L. (^) ; glo- 

 bular, rough, opaque, with 3 

 slits. 



64. Solix pentandra, L. (^^] ' a- 

 oval, with 3 rough bands, b. 

 end up. c. in oil. d. in water 

 3 bands still visible. 



PLATANACEJE. 



65. Platanus orientalis, L. (j^) : 



a. very minute, oval, opaque, b. 

 in oil, with 3 bands, c. in water 

 spherical. 



BETTJLACE^;. 



66. Alnus fflutinosa, L. (g^) a - 

 opaque, polyhedric. b. in water 

 sub-globular. 



ULMACEA 



67. Uimus campestris, L. (g-^) > 

 globular, rough, with curved 



