1556 PHANEROGAMS. 



Europe and the United States and also from the Laramie. Coton- 

 easter dates from the Eocene of Provence, and Cratcegus (Thorn) 

 from the Laramie. 



Order 21. Leguminos.e. — The large and well-known order of 

 Leguminous plants, in which the fruit is usually in the form of a 

 pod or legume, in which the seeds are placed, is divided into three 

 families, of which the palseontological history is still imperfect. In 

 the Papilionacece, characterised by their imbricate papilionaceous 

 petals, leaves from the Miocene of Croatia have been referred to the 

 Australian genus Gastrolobium, but the determination is very doubt- 

 ful ; and the same remark applies to those described as Oxylobium. 

 Genista (Broom) has been recorded from the Miocene of Germany ; 

 Cytisus from several European Miocene deposits ; and Trigonella, 

 Indigofera (Indigo), and Tephrosia from the Upper Miocene of 

 CEningen. Robinia apparently dates from the Lower Miocene of 

 Germany ; while Colutea occurs at CEningen, and is also recorded 

 from the Cretaceous of America and Greenland ; and Erythi?ia is re- 

 presented in the Croatian Miocene. Passing by some less important 

 forms we may notice that Dalbergia, now mainly confined to India, 

 is common in the European Tertiaries, and is also recorded from 

 the Cretaceous ; while the American Drepanocarpus occurs in the 

 Eocene of Monte Bolca, the Asiatic Pterocarpus in the Miocene, 

 and the American Piscidia in the Miocene of Croatia. Micropodium, 

 P/iasco/ites, and Ervites are extinct types from the Upper Eocene of 

 Provence ; Palceolobium, of the European Miocene, being also ex- 

 tinct. Finally, Cercis (Judas-tree), now represented by only a few 

 species in the northern hemisphere, of which one occurs in southern 

 Europe, dates from the Laramie Cretaceous, and is abundant in the 

 Tertiaries. In the Ccesalpiniacecz the genus Gkditschia, now con- 

 fined to North America and China, occurs in the European Miocene, 

 while Ccesalpinia dates from the Eocene. The Upper Eocene of 

 Provence has yielded an extinct type termed Ccesalpinites. The 

 widely spread tropical and subtropical genus Cassia makes its first 

 appearance in the Cretaceous of both hemispheres ; Bauhinia 

 occurs in the Miocene of Croatia and CEningen ; and Ceratonia and 

 Copaifera date from the Eocene. Hymenaa, of tropical America, 

 is found in the Cretaceous of France and New Jersey ; and the ex- 

 tinct Podogonium ranges from the Laramie Cretaceous to the 

 CEningen Miocene. In the third family, or Mimosacece, Prosopis 

 and Inga are described from the Eocene of Eubaea ; while Mimosa 

 and Acacia date from the Upper Eocene of Provence. In conclu- 

 sion we have to mention the extinct genus Legumino sites (fig. 141 5, 

 c), ranging from the Cretaceous to the Miocene, of which the serial 

 position is at present undetermined. 



Order 22. Heterophylle^e. — With this order we come to the 

 end of the Choripetalae. In the Aristolochiacece, the type genus 



