GLOSSARY 165 



Supra-axillary. Above rather than in the axil. 



Sympodial. Continuing the growth by development of an 



axillary bud and not a terminal bud, either internode after 



internode (grape), or season after season (elm), as 



applied to twigs. 

 Tangential. At right angles to the medullary rays, as applied 



to the duct pattern of such woods as elm: contrasted with . 



radial, as in oak, in cross section. 

 Tendril. A leaf (clematis> or stem (grape) modified to form 



a specialized climbing organ. 



Terete. Round in cross-section, as applied to twigs, etc. 

 Thorn. The same as spine: a pungent modification of leaf or 



twig; contrasted with prickles or superficial pungent out- 

 growths. 



Tomentum. Woolly pubescence. 

 Toothed. With the margin cut in, but not deeply enough for 



lob ing, as applied to leaves. 



Torulose. Constricted between swollen parts (fruit of radish). 

 Tracheae. The same as ducts. 

 Tracheides. Short wood-cells, replacing ducts or tracheae in 



conifers as water channels: characteristically marked by 



microscopic bordered pits, spiral thickening, etc., like the 



ducts. 



Trailing. With elongated stems spreading on the ground. 

 Translucent. The same as pellucid. 



Trifoliolate. Of three leaflets, as applied to compound leaves. 

 Triple-nerved. With three palmate nerves, or with two strong 



branches from the lower part of the midrib. 

 Truncate. Cut off rather abruptly, as applied to base or apex 



of a leaf. 



Trunk. The main stem of a tree. 

 Tuberculate: Warty with rounded prominences (twigs of elder 



etc.). 

 Tubular. Cylindrical, without a spreading border, as applied 



to calyx or corolla: here used rather loosely. 

 Turbinate. Top-shaped or inversely conical. 

 Twigs. The finer or finest branches of a stem. 



