( 800 ) 



discussing point 4. We find tlie already stated conception confirmed 

 that the bisexual flower, being in a latent condition loith respect to 

 the anomaly, preferably occurs in the most favourable places. 



We may also assume that the plant during the flowering of its 

 top-umbel, which only occurs after it has reached its full vegetative 

 development, is also in the strongest stage of its growth, in a stage 

 in which a good part of its nutritive material may be spent on the 

 development of its top-umbel, while all umbels that bud forth later, 

 are in less favourable conditions, first on account of their being 

 placed on lateral axes of the second or higher order and secondly 

 because a very great part of the nutritive material is spent on the 

 ripening of the fruit of the first umbel during the development of 

 the umbels of the second or at any rate higher orders. This would 

 explain why in the umbel of the second order the semi-latent bisexual 

 flower is no longer prominent in the same degree as in the terminal 

 umbel, and why in the umbels of the third and fourth order it more 

 and more gives way before the racial character. 



This also explains why in very strong specimens the male flowers 

 first appear in the umbels of the third order, and why often with 

 Slum, latifolium, Daucus Carota and others, not until late in summer, 

 when the plant has already passed its highest point of development, 

 male flowers and even male umbels appear in plants which in their 

 umbels of the first and second or first, second and third order have 

 exclusively produced bisexual flowers. 



That in fact strongly developed specimens produce more bisexual 

 flowers than weak specimens was already noticed by Mac Lkod. 

 With strong specimens — he says in his note on Aec/opodium 

 Podar/raria, — the umbels of the first order and with very strong 

 specimens also those of the second order consist almost exclusively 

 of hermaphrodite flowers, while with ordinary specimens the 

 umbellules in the umbels of the first order consist partly and in those 

 of the second order exclusively of male flowers. Also Schulz made 

 the same remark with Torilis Andmscus and Pimpinella saxifraga 

 and personally I found the justness of his remark repeatedly confir- 

 med with Pimpinella magna, Aegopodium Podagraria, Aethusa 

 Cynapiuvi, Astrantia major etc. 



If now finally the numerical relations of the two flower-forms are 

 examined in umbels of such species as are fovmd in large numbers 

 on soils of different constitution and fertility, the examination at once 

 shows that the number of bisexual flowers in a fertile place is 

 considerably greater than in a less fertile one. Anthriscus silvestris 

 and Chaerophyllum temalum arc plants which in our country are 



