Tennessee Flora. 101 



P. angustifolia Marsh. P. Chickasa Michx. Chickasa 

 plum. Very frequent in the limestone basin of M. Tenn. 

 April. Fruit ripe in May, June. 



P. gracilis Engelm & Gray. In Tennessee, according to 

 Gray's Manual. 



P. spinosa L. Sloe blackthorn. Hillsboro Pike, twelve 

 miles from Nashville. Escaped into the w^oods from an or- 

 chard. Adventitious from Europe. April. 



P. Cerasus L. Sour cherry. In cultivation, and sometimes 

 escaping into open grounds. Native of Europe. April, May. 

 Fruit in June, July. 



P. avium L. Sweet cherry. Also cultivated like the 

 former in several varieties, and wandering into open grounds. 

 Tennessee is at the Southern limit of the natural zone of both 

 species ; and, therefore, the fruit is inferior. 



P. domestica L. Damson. Cultivated only. 



P. Pennsylvanica L. fil. Pin or pigeon cherry. E. Tenn. 

 Principally in the higher mountains. On Clingman Dome a 

 form is found with narrow, lanceolate leaves. April-June. 

 The latter is perhaps P. serotina montana Small. 



P. Armeniaca Willd. Apricot. Native of Persia. In cul- 

 tivation only. 



P. Virginiana L. Chock cherry. Cumberland and Alle- 

 ghany Mts. April, May. 



P, serotina Ehrh. Wild black cherry. Large tree, often 

 from 50 to 70 feet high. Wood used in cabinetmaking. May. 

 Fruit ripe in August, ^f. 



AMYGDALUS L. 



Amygdalus Persica L. Peach. Frequently escaped from 

 cultivation. To be considered naturalized. April. Fruit in 

 August-October. 



A. communis L. Almond. Rarely found in cultivation. 



MIMOSACEJi] Reichenb. 

 ACACIA Adans. 



Acacia Julibrissin L. Native of Persia. In gardens. 

 A. lophantha L. Appears here and there in gardens, and en- 

 dures hard winters. 



ACUAN Med. (Desmanthus Willd.) 



Acuan Illinoensis (Michx.) Kuntze. Desmanthus brachy- 

 lobus Benth. Frequent in the glades of M. Tenn. May-Sep- 

 tember. 



