244 Eleventh Annual Report 



MALACE^. The Apple Family. 



The trees of this family that occur in our area have simple, alter- 

 nate leaves; perfect, regular flowers, 5-merous calyx and corolla; 

 fruit a more or less fleshy pome. 



Flowers in racemes, cavities of mature fruit twice as 

 many as the styles, seeds less than 4 mm. (3^ inch) 



long 2 Amelanchier. 



Flowers in cymes or corymbs, cavities of mature fruit 

 as many as the styles, seeds more than 4 mm. (3/8 

 inch) long. 



Fruit green, mature carpels papery 1 Malus. 



Fruit red, orange, blue, black or yellow, mature carp- 

 els bony 3 Crataegus. 



1. MALUS.* The Apples. 



There are two marked forms of Malus coronaria. One of these 

 has recently been segregated by Mr. Alfred Rehder as Malus glau- 

 cescens. The Indiana tree is intermediate between these two types 

 as to most of the material seen; and at present it seems best to 

 consider it one species. 



Malus augustifolia has been reported from Indiana; but it is a 

 southern species which I have seen no farther north than Cairo, 

 Illinois. 



The narrow-leaved form of Malus coronaria and also Malus ioen- 

 sis resemble augustifolia in leaf-outline and might easily be mis- 

 taken for it. 



Leaves and petioles glabrous or only slightly pubescent; 

 calyx lobes tomentose inside only; fruit depressed- 

 globose, greenish-yellow 1 M. coronaria. 



Leaves (at least the lower surfaces) and petioles densely 

 tomentose; calyx lobes densely tomentose on both 

 sides; fruit subglobose, green 2 M. ioensis. 



1. Malus coronaria (Linnseus) Miller. Crab Apple. (M. glau- 

 cescens Rehder). Plates 76 and 77. Bark reddish, fissured and 

 scaly; leaves on glandless petioles, petioles usually 2-4 cm. (^-IJ/^ 

 inches) long, leaves narrow ovate to almost triangular, those on the 

 lateral branchlets of the ovate type, those of the terminal branch- 

 lets and vigorous shoots of the triangular type, 3-8 cm. (1 3/^-3 inches) 

 long, acute at the apex, mostly rounded or somewhat cordate at the 



♦Contributed by W. W. Eggleston, Bureau of Plant Industry, Washington.iD. C, 



