38 NEW YORK STATE MUSEUM 



reddish or yellowish hues. Thej' are glandular on the margin and 

 in some species on the surface also. These scales are generally 

 soon deciduous. 



The flowers in our species are, with one exception, Cratae- 

 gus uniflora, produced in clusters at the ends of short 

 leafy terminal or lateral branches. In the earliest species to 

 flower in our latitude they appear about the end of the first week 

 in May, in the latest, the first week in June, making the flowering 

 season about one month long. In nearly all cases the flowers open 

 and their petals fall before the leaves are fully developed. The 

 flower stems or peduncles may be long or short, simple or 

 branched, glabrous or hairy, according to the species. The 

 branching peduncles frequently support three flowers each, the 

 central flower opening a little earlier than the two lateral. The 

 calyx is superior and five lobed, the petals are five, the stamens 

 vary from 5 to 20 and the pistils from 1 to 5. The stamens 

 are normally 5, 10, 15 or 20 in any given species, but by the sup- 

 pression of some or the union of two adjacent filaments such 

 definite numbers are not always found. Nevertheless the number 

 of the stamens is now utilized as a specific character. The color 

 of the anthers may be pale yellow or whitish, pink or rosy red, 

 purplish red or violaceous, and though these colors are very fleet- 

 ing they are recognized as having, in many cases, specific value. 

 The calyx lobes are generally tipped with a single gland, their 

 margins may be entire or furnished with sessile or stalked glands. 

 They are erect in bud but spreading or reflexed in anthesis and in 

 some species they later become again erect or incurved. In many 

 species they also become red on the inner basal surface as they 

 advance in age. They are sometimes deciduous from the ripe 

 fruit, specially in species belonging to the section Tomentosae. 

 The petals are nearly always white in our species. In one or two 

 they show a tendency to become rosy tinted when they begin to 

 wither. They are quickly deciduous. They are sometimes eroded 

 or wavy on the edge, and are generally furnished with a short claw 

 at the base. 



The time of ripening of the fruit extends from the middle of 

 August to the middle of October, The number of fruits in any 



