GLOSSARY 367 
Cortex. The rind or outer covering of a stem; technically it 
lies outside of the vascular bundles, which constitute the 
stele. 
Cottony. Much the same as woolly, with white hairs. 
Creeping. Prostrate and spreading over the ground. 
Crenate. Scalloped ; with rounded teeth. 
Crenulate. Finely crenate. 
Crisped. Wavy on the margin (leaves of laurel); short and 
curly when applied to pubescence. 
Cuticle. The outermost layer of the epidermal cell walls. 
Deciduous. Falling away (leaves of elm in contrast with the 
persistent or evergreen leaves of ivy; terminal bud of 
ailanthus in contrast with the persistent end-bud of false 
cedar). Deciduous leaf-scars occasionally form at the top 
of a leaf-cushion which later falls away (cercidiphyllum, 
cornus, garrya, hamamelis). 
Decompound. Repeatedly compound. 
Decurrent. Continued down the stem in a ridge or wing, as 
applied to leaf-bases. 
Decussate. With the pairs successively over the gaps of those 
below (leaf-scars of maple). 
Dehiscent. Opening to discharge the seeds (fruit) or pollen 
(anther). 
Deliquescent. Breaking up into fine branches (white elm). 
Deltoid. Triangular, with equal sides. 
Dentate. Toothed, the teeth spreading. 
Denticulate. Finely dentate. 
Denuded. Naked through loss of pubescence, epidermis, etc. 
Depressed. Shortened, as applied to round buds or fruits. 
»-Diaphragmed. With firmer plates at the nodes (grape) or 
between them (tulip tree), as applied to continuous pith. 
Dicotyledonous. Belonging to or characteristic of Dicotyledo- 
neae, one of the two main groups of angiosperms. 
Diffused-porous. Wood in which the ducts are scattered and 
neither larger nor more numerous in the spring wood 
