280 Eleventh Annual Report 



Horticultural uses. This is one of the most desirable thorns for 

 ornamental planting and hedges. Its scarlet autumn foliage and 

 beautiful little scarlet fruit persist for a long time. It is also one 

 of the American thorns long in cultivation. 



According to the treatment of the genus Crataegus in Britton and 

 Brown's Illustrated Flora, 2d Edition, the range of the following 

 species extend into Indiana. 



Throughout the State — In the northern part of the State — 



C. Boyntoni. C. Brainerdi. 



C. intricata. C. lucorum. 



C. straminea. C. chrysocarpa. 



In the southern part of the State — q flijpeg 



C. berberifolia. C. beata. 



C. denaria. C. viUipes. 



C. fecunda. C. Pringlei. 



C. coUina. C. albicans. 



C. ovata. 



AMYGDALACE^. The Plum Family. 



Leaves alternate, simple, rather thick, usually serrate, stalked, 

 stipules early fugacious; flowers regular, perfect, calyx and corolla 

 5-merous; fruit a 1-seeded drupe. The trees of this family exude a 

 gum when wounded, and those that occur in our area bear edible 

 fruit. 



Flowers corymbose, appearing before or with the leaves 



on branchlets of the previous year 1 Primus. 



Flowers racemose, appearing after the leaves on branch- 

 lets of the year 2 Padus. 



PRUNUS. The Plums and Cherries. 



(From prunus, the Latin word for plum.) 



Cherries, leaves shiny above; flowers small, petals mostly 



4-6 mm. (3^ inch) long; stone of fruit globose IP. pennsylvanica. 



Plums, leaves dull above; petals 7-12 mm. (1/3-K inch) 

 long; stone of fruit flattened. 

 Teeth of leaves sharp pointed and ending in a callous 



tip; calyx lobes without glands 2 P. americana. 



Teeth of leaves rounded and the vein ending in the cen- 

 ter tipped by a gland; calyx lobes glandular 3 P. nigra. 



1. Prunus pennsylvanica Linnaeus fils. Wild Red Cherry. 

 Plate 98. Bark of trunk reddish-brown, redder than that of the 

 common wild cherry; leaves oblong-lanceolate, 4-10 cm. (13/2-4 

 inches) long, thin, usually long taper-pointed, tapering or rounded 

 at the base, serrate, sometimes doubly serrate, many of the teeth 



