for tlie Microscope. 15 



no. WILLOW HERB POLLEN (Epilobium angnstifolium}. 

 The pollen granules in some species of Willow Herb 

 are in groups of three or four. In the present species, 

 which is common in cottage gardens, the granules are 

 triangular. (PI. II., fig. 9.) 



in. BUTTERCUP POLLEN (Ranunculus acris). All the 

 Buttercups have pollen of a specific character, differing 

 either in size or appearance one from another. In the 

 majority they are more or less elongated, and in the pre- 

 sent instance four-lobed or nearly square in the end view. 

 (PI. II., fig. 10.) 



112. SCORZONERA POLLEN (Scorzoncro, Hispanica). 

 This is a large and beautiful pollen, and although the plant 

 is but little in cultivation, it is worth growing for the sake 

 of its pollen. The form is polyhedral, with projecting 

 hexagonal reticulations. (PI. II., fig. n.) 



113. SALSIFY POLLEN (Tragopogon porrifolius). The 

 granules of Salsify are also polyhedral, but differing from 

 those of the Scorzonera. This is another plant which is 

 worth cultivating a plant or two for the sake of its pollen. 



114. LANCEOLATE PLANTAIN POLLEN (Plantago lancco- 

 lata). This very common plant has spherical pollen, the 

 surface of which contains numerous depressions or pores. 

 The cellular structure of the anthers is worthy of exami- 

 nation. (PI. II., fig 12.) 



115. PHLOX POLLEN (Phlox Drummondi). This gar- 

 den plant yields a spherical pollen, with the surface 

 reticulated in a regular hexagonal manner. The most 

 beautiful pollen of this kind is yielded by a species of 

 Cobcea. 



1 1 6. ZAMIA POLLEN (Zamia Mexicana). This plant is 

 cultivated in stoves, and is not at all uncommon. The 

 pollen is produced plentifully. It is very transparent, and 

 may be viewed as such. In form it resembles a miniature 

 'pig cowry.' (PI. II., fig. 13.) 



117. CEDAR POLLEN (Cedrus Libanus). This is a very 

 good type of coniferous pollen, consisting of two lobes 

 of nearly hemispherical shape, connected by a kind of 

 isthmus. There is a great similarity in the character of 



