136 crucifer^:. 



white or rarely purple ebracteate flowers. Petioles of the 

 lowest leaves elongated, usually not dilated at the base. 



Etymology. From KdpRafiov, an ancient name for Cress. 



Geographical Distribution. A pretty large, cosmopolite genus, most 

 abundant in the cooler temperate zones and on mountains, extending into the 

 arctic and antarctic regions. 



Note. The genus is not yet well divided into natural sections. The 

 species here figured is one of those which approach Dentaria. 



PLATE 55. Cardamine rhomboidea, DC; — a small specimen. 



1. A sepal, enlarged, seen from the inner side. 



2. A petal, equally enlarged. 



3. Stamens and pistil, with the glands of the receptacle; enlarged. 



4. Magnified pistil, seen sidewise, showing three of the four crescent- 



shaped hypogynous glands. 



5. Same, with the ovary transversely divided. 



6. An ovule, more magnified. 



7. A silique, of the natural size. 



8. A dehiscent silique, magnified, showing part of the seeds of one cell, 



the partition, &c. 



9. Portion of the tissue of the partition, highly magnified. 



10. Magnified seed, divided transversely, through the accumbent cotyledons. 



