SUPPLEMENT 



tain districts, but would rarely be available for class work. The 

 plants are illustrated, and their methods described in nearly all text- 

 books of Botany; the Darlingtonia is treated at length in Kerner's 

 work, Watson's "California Flora" and Miss Parsons' "Wild 

 Flowers of California." It is not easy to condense the stories, so 

 they are omitted here. It is the leaves, not the flowers, that capture 

 the insects, and in most cases there is actual digestion of the prey. 



The highest families of this group are the Malvaceae, referred to 

 in the Supplement to Chapters VIII and IX ; the I/inden family, 

 which includes the linden, or lime tree, of northern Europe, the bass- 

 wood of our Eastern States and the chocolate tree of tropical 

 America ; and another family which includes the tea tree and the 

 Camellia. Chocolate is made from roasted seeds, tea is, of course, dried 

 leaves. The fruits of the cotton plant, showing the seeds clothed 

 with cotton are easily obtained. The products of the cotton seed, 

 i. e., oil, cottolene, etc., should be noted. 



The relationship of the different families of the next group of Chori- 

 petalae is not sufficiently obvious to warrant much attention. The 

 geranium family is rather fully considered in Chapter X, and our 

 common species of Rhus, Rhamnus and Ceancthus in the Supple- 

 ment to Chapter VIII. The poison sumach and poison ivy of our 

 Eastern States are species of Rhus. Some of the best known orna- 

 mental and timber trees of other climates belong here ; the numerous 

 maples, box-elder, horse-chestnut, buckeye, the true holly, and many 

 trees of the tropics and Southern Hemispheres, the small tree that 

 furnishes mate", or Paraguay tea, being the most important economi- 

 cally. The citrus trees have been introduced mainly from India ; our 

 cultivated grapes are mostly from Europe, but the most common 

 grapes of our Eastern States have been cultivated from native species. 

 Linseed oil, as well as linen, is a product of flax. 



No characteristic that is universally true of Euphorbiaceae can be 

 affirmed, so little attention should be given to the kinship of our 

 scattered species. They are all considered elsewhere in the Supple- 

 ment, and Euphorbias of special economic importance are sufficiently 

 indicated in the Reader. 



The highest group of Choripetalae is characterized in the Reader, 

 and many of its families are so well represented with us that they are 

 treated specially in other chapters : Umbelliferse in Chapter XII, 

 Onagraceae in Chapters IX and XV, Cactaceae and the nearly related 

 succulent orders in Chapter XV, Saxifragaceae in Supplement to 

 Chapters V, VIII and IX, Rosaceae in Supplement to Chapters VIII 

 and XV, and Leguminosae in Chapter X. There are two families 



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