26 TREES OF THE NORTHERN UNITED STATES 
ARRANGEMENT OF FLOwERS.— Flowers, either solitary 
or clustered, grow in one of two ways; either at the end 
of the branches, being then called terminal, or in the axils 
of the leaves, then called azillary. The stem of a solitary 
flower or the main stem of a cluster is called a pedunele ; 
the stems of the separate blossoms of a cluster are called 
pedicels. When either the flowers or the clusters are 
without stems, they are said to be sessile. 
Clusters with Petlicellate Flowers. 
Raceme, “eae flowers on pedicels of about equal 
length, scattered along the entire stem. Locust-tree. 
Corymb, like a raceme except that the lower 
flowers have longer stems, making the cluster some- 
what flat-topped; the outer flowers bloom first. Hawthorn. 
Cyme, Va in appearance much like a corymb, but it 
differs in / the fact that the central flower blooms first. 
Alternate-leaved Cornel. 
Umobel, ~@ stems of the separate flowers about equal 
in length, and starting from the same point. Gar- 
den-cherry. 
Panicle, Be. a compound raceme. Catalpa. 
Thyrsus, a compact panicle. Horse-chestnut. 
Clusters with Sessile or Nearly Sessile Flowers. 
Cathkin, x, bracted flowers situated along a slender 
andusual-gy }} ly drooping stem. This variety of clus- 
terisvery 4® § common on trees. The Willows, Birches, 
Chestnuts, Oaks, Pines, and many others have their flow- 
ers in catkins. 
Aes: the flowers in a close, usually rounded 
Fl 
cluster. owering Dogwood. 
Fruit.—In this book a single fruit will include all the 
parts that grow together and contain seeds, whether from 
