70 VASCULAR PLANTS. 



form; lateral ones contiguous; intervals ce-vit- 

 tate. U- 



15. Carum, L. 



Umbels regularly compound. Cremocarp 

 laterally compressed, oblong. Mericarp equally 

 5-ribbed; ribs filiform, lateral ones contiguous; 

 commissure plane; intervals 1-vittate. 



0. flowers white. 



16. Apiastrum, Nutt. 



• 



Umbels regularly compound Cremocarp 

 very much contracted at the commissure, cor- 

 date. Mericarp incurved at base and apex, 

 5-ribbed, ribs little elevated; intervals 1-vittate. 



0. flowers white. 



17. Conium, L. 



Umbels regularly compound. Cremocarp 

 laterally compressed. Mericarp deeply sulcate 

 on the face; 5-ribbed; ribs undulate-crenate; 

 intervals 0-vittate. 



. flowers white. 



18. Deweya, Torr. & Gray. 



Umbels regularly compound. Cremocarp 

 laterall} r compressed. Mericarp reniform in 

 transverse section, 5-ribbed; intervals more 

 than 1-vittate. 



U . flowers yellow. 



