244 



FAMILIES OF FLOWERING PLANTS. 



western States. In the tribe Ixoreae is contained the genus Goffea, or 

 coffee, one of the important staples of the tropics. The related genus 

 Ixora includes some trees with very hard, tough wood, notably the West 

 Indian ironwood {Ixora ferrea). 



Our native Eubiaceous plants are limited in the northern states to 

 the partridge-berry, Mitchella (Fig. 211), the various species of Houstonia 

 or bluets (Fig. 212) and the bedstraws (Galium), the latter homely insig- 

 nificant weeds. (Fig. 213). 



Family Caprifoliaceae. Honeysuckle Family. Consist of about 



10 genera and and 260 species, mostly of the 

 northern hemisphere. They are shrubs, trees, 

 vines, or even herbs, having opposite leaves 

 ordinarily without stipules, and mostly cymose 

 flowers. Calyx 3-5-toothed. Corolla 5-lobed, 

 occasionally bilabiate. Stamens 5 or 4, borne 

 on the tube of the corolla. Ovary inferior, 1-6- 

 celled, becoming in fruit a berry, drupe or 

 capsule. 



The honeysuckles form a very attractive 

 group, most of the genera being ornamental in 

 cultivation. Lo7iicera, which includes all the 

 true honeysuckles, is a genus of shrubby vines, 

 many with evergreen foliage, and all having 



Fig. 212. Bluets (Houstonia 

 coerulea). One-half natural size. 

 Original. 



flowers with great beauty of 

 form and diversity of color ; 

 they are also very fragrant. 

 Viburnum consists of shrubs and 

 trees, of which the snowball tree 

 is a good example ; there are 

 many native species. (Fig. 214.) 

 The dainty little twin-flower of 

 northern regions, Linnaea hor- 



ealis, is another number of this Fig. 213. a native species of Bedstraw (Galium 



» ., T n L coneinnum). After Britton and Brown, HI. Fl. North- 



family. In the west occur sev- east u. s. 



eral species of undershrubs with small bell-shaped flowers and white 



