THE PLANT WORLD. 



Description of Fig. i. 



1. Twig of Hickory {Hicoria alba (L.) Britt.) showing strong terminal 

 bud and two superposed lateral buds. 



2. Twig of Walnut {Jiiglaiis nigra L.) showing terminal bud, super- 

 posed lateral buds, heart-shaped leaf-scars, and diaphragmed pith. 



3. Twig of Oak (Qiicrcus alba L.) showing lateral buds clustered at 

 apex. 



4. Twig of Ash (Fra.viniis Pciiiisyhaiiica Marsh.) showing termiijal 

 bud, opposite leaf-scars, felty-pubescent scales, and a continuous central 

 bundle-scar. 



5. Soft Maple (Jeer saccharinuin L. ). Buds opposite, leaf-scars U- 

 shaped, with three bundle-scars, the angles of the leaf-scars connected by 

 a line on the epidermis. X 2. 



6. Box-elder {Acer Ncgtiiido L.). Opposite leaf-scars with a peculiar, 

 thin appendage connecting the angles. The portion of the twig just above 

 the leaf-scars is compressed in a characteristic manner. X 2. 



7. Beech (Fagits Americana Sweet). Bud long and slender, with nu- 

 merous scales. On each side at the base is a stipule-scar. 



8. Honey Locust (Gleditschia triacanthos L.). Twig showing super- 

 posed buds, the uppermost of which develops immediately into a thorn. 

 A longitudinal section shows the numerous superposed buds. X 2. 



9. Tulip Tree (Liriodcndron Tulipifera L. ). Twig showing flattened 

 buds and encircling stipule-scars. 



10. Azalea (A;:;alea nitdiflora L.). Twig showing terminal flower-bud 

 and clustered leaf-buds. 



11. Sycamore (Platanus oeeidentalis L.). Twig showing conical bud 

 with a single bud-scale and the encircling stipule-scar. The uppermost 

 lateral bud continues the growth of the stem. Beside this is shown the 

 scar of the cast terminal portion of the twig. 



12. Smooth Sumac (Rhus glabra L.). Twig showing felty-pubescent, 

 so-called naked buds, U-shaped leaf-scars which enclose the buds, and the 

 base of the well-developed terminal portion whicli is deciduous. 



13. Chestnut (Castanea dentata (Marsh.) Borkh.). Twig showing the 

 terminal scar such as occurs also in elms, basswood, and other 2-ranked 

 twigs. 



