OF ORNAMENTAL TREES. 229 



by the fleshy disk. Leaves linear, distant. 

 Acorn yew. Native of Japan, where it grows 

 about twenty feet high, with a diffuse and ir- 

 regular habit. It is in the collection of John 

 Evans. It is often propagated by grafting 

 on the English yew. 



THUJA, Tournefort. Nat. Ord. Pinacese. 

 Monoecia, Monadelphia, Linn. Male catkin 

 terminal, solitary. Pollen of each flower con- 

 tained in four cases attached to the inner face 

 of the scale towards the base. Female cat- 

 kin terminal. Ovary joined with the bractea, 

 thus forming a receptacle. Ovules two to 

 each receptacle.* 



1. T. OCCIDENTALS, Linnceus. Cones obo- 

 vate, scaly ; seeds winged; branches horizontal, 

 recurved. American arbor vitae. Native of 

 the Northern States. 



* In accordance with my plan I adhere to the nomen- 

 clature in common use, though I cannot help observing 

 that the separation of No. 2 and No. 3 from the genus 

 under the name of BIOTA, Don, is very judicious, as all 

 who are familiar with the dissimilarity of their fruits will 

 admit. The species not having winged seeds are now 

 referred to Biota. 



20 



