I04 MICROSCOPICAL RESEARCH 



PLATE XVII. 



FLORAL STEUCTURE. 



Fig. 60. Flower, entire of Wheat. ' Triticum vulgaris ' x 15 dia. 

 Fixed with. Chi'omo-Acetic solution. Stained with Borax 

 Carmine. 1. Ovary. 2. Ovule with emhryo-sac. 3. Enlarged 

 base of flower. 4. Main shafts of stigma. 5. Lateral 

 branches of stigma. 6. Anthers, having already opened and 

 shed some of their pollen. 7. Filament of stamen. 

 (Specimen dissected out of its sheath about ten days prior to 

 its natural time of opening.) 



Fig. 61. One shaft of a Stigma, from a flower collected and prepared 

 as above. 1. Shaft of the stigma. 2. An isolated pollen 

 grain, with its tube. 3. Pollen grain, its tube penetrating 

 a stigma, its course being indicated by dotted lines. 



Fig. 62. Portion of above Stigma (Fig 3 in dotted outline) x 180 dia. 

 3. The pollen grain. 4. Its tube ; the dotted outline indicates 

 its course. 5. Nucleus of stigmatic cell. 



