248 Muhlenberg's observations on the 



1. Fraxinus sambucifolia Willd. This species 

 has different names in common with others, as 

 white ash, black ash, &c. It is but small, and 

 stands generally in or near the water ; and N is best 

 distinguished by its sessile serrated leaflets, with 

 woolly ribs, and by its linear seeds. I find con- 

 stantly male flowers upon some, and hermaphro- 

 dite upon other stems. They have neither calyx nor 

 corolla, and the anthers are blunt at the upper end. 

 This species of ash is F. nigra of Marshall and 

 of Pott*, excluding the synonym of F. excelsior 

 of Kalm. 



2. Fraxinus pubeseens "Willd. This is easily 

 known by the lower surface of the leaves, the leaf- 

 stalks and peduncles being furnished with soft hairs. 

 Male and female flowers upon different trees. 

 Anthers 2-4, pointed at the upper end. The seed 

 is the longest of all the species that grow in this 

 country, and elongated into a point. Corolla none. 

 Calyx of five divisions. It is very well described 



* J. P. Du Roy's Harbk'^che wilde Baumzucht. Second edition ia 

 •3 vols, (enlarged) by Dr. Pott of Brunswic, i8oq. 



