368 Glossary 



than in that formed in summer (willow, basswood). Con- 

 trasted with ring-porous. 



Digitate. Spreading like the fingers, the leaflets leaving the 

 petiole at one point (stauntonia), as applied to compound 

 leaves. 



Dingy. Neither white nor brightly colored, as applied to 

 pubescence. 



Disarticulating. Falling away by abscission, leaving a clean- 

 cut scar, as with most leaves, many flowers, some twig- 

 tips, etc. 



Discoid. The same as chambered, when applied to pith. 



Disk. An enlarged tip, as applied to tendrils (Boston ivy). 



Distichous. Two-ranked. 



Divergent. The same as spreading. 



Divided. Deeply lobed (leaves): compound (bundle-traces). 



Dorsal. Of or on the back of a leaf, etc. 



Dotted. With lighter or darker spots or blackened hairs or 

 glands, usually on the lower leaf-surface, as here used. 



Downy. Pubescent with soft short straight hairs. 



Drupe. A stone-fruit (cherry). Many "berry-like" fruits are 

 technically small drupes, even that of the huckleberry. 



Duct. A water-passage in the wood; a trachea or vessel: 

 easily seen in oak which is ring-porous, and walnut which 

 is diffused-porous. The size and distribution of ducts 

 afford usable means of distinguishing between bits of 

 wood. 



Dull. Not glossy. 



Dwarf-shoots. The same as spurs. 



Elbowed. Bent, like an arm at the elbow (crape myrtle bud). 



Ellipsoid. Elliptical in section, like a football. 



Emergences. Appendages other than hairs, of root, stem or 

 leaf. 



End-bud. The growing tip normally terminating a stem or 

 its developed branches: sometimes transformed into a 

 flower (magnolia) or inflorescence (lilac), or cast off 



