14 One Thousand Objects 



pollen of this common plant is very characteristic, having 

 a rounded outline, with the margin plicated or folded, so 

 as to appear ribbed in a side view, and radiating in an end 

 view. (PI. II., fig. i.) 



102. NASTURTIUM POLLEN (Tropceolum majus). The 

 outline of the pollen of the common Nasturtium is tri- 

 angular. It is rather large, and may be seen as an opaque 

 object with a one-inch power. (PI. II., fig. 2.) 



103. YELLOW FUMITORY POLLEN (Corydalis luted). 

 The pollen of this plant is very diverse in its forms, some- 

 times nearly spherical, at others deeply constricted and 

 lobed. (PI. II., fig. 3.) 



104. ST. JOHN'S WORT POLLEN (Hypericumperforatuni). 

 The granules in this species have the appearance of a 

 sphere divided by three bands. (PI. II., fig. 4.) 



105. MALLOW POLLEN (Malva sylvestris). No enume- 

 ration of pollen would be complete were the pollen of the 

 Mallow omitted. It is such a common object that no 

 description or figure is necessary. It should be mounted 

 dry, attached to the anther. (See No. 77.) 



1 06. MUSK PLANT POLLEN (Mitmilus moschatus). 

 These curious granules resemble a band or cord rolled or 

 folded in a spherical mass, somewhat like the pollen 

 grains of Thunbergia, an exotic plant. (PI. II., fig. 5.) 



107. SOWTHISTLE POLLEN (Sonchus piilustris). The 

 Marsh Sowthistle has a very interesting pollen, somewhat 

 spherical, but divided by a raised reticulation into angular 

 cells, but less distinctly than in the Scorzonera. (PI. II., 

 fig. 6.) 



1 08. RUSH POLLEN (Juncus sp.) The pollen grains 

 in most species of rush are spherical, in clusters of four. 

 When the granules emit their pollen-tubes, these clusters 

 exhibit a very interesting appearance, as delineated in the 

 figure. (PL II, fig. 7.) 



109. LINSEED POLLEN (Linum nsitatissinmni). In the 

 common Flax plant the pollen has a square form, and 

 when the pollen-tubes are emitted, one issues from each 

 corner, and one from the centre above and below. (PI. 

 II.. fig. 8.) 



