[380] North American Trees 



Sterigmata. Short, persistent leaf bases found on spruces and 

 hemlocks. 



Stigma. The part or surface of a pistil which receives pollen 

 for the fecundation of the ovules. 



Stipule. An appendage at the base of the petiole, usually one on 

 each side. 



Stoma. An orifice in the epidermis of a leaf used to connect in- 

 ternal cavities with air. 



Stomata. Plural of stoma. 



Stomatiferous. Furnished with stomata. 



Strobile. A cone. 



Style. The attenuated portion of a pistil between the ovary 

 and the stigma. 



Sub. A Latin prefix denoting somewhat or slightly. 



Subtend. To lie under or opposite to. 



Subulate. Awl-shaped. 



Succulent. Juicy; fleshy. 



Superior ovary. Free from and inserted above calyx; hypogy- 

 nous. 



Superposed. Placed above, as one bud above another at a node. 



Suture. A junction or line of dehiscence. 



Syncarp. A multiple fleshy fruit. 



Taproot. The primary descending root, which may be either 

 very large or absent at the maturity of the tree. 



Terete. Circular in traverse section. 



T^^rmma/.^tuated at the end of a branch. 



Ternate. In groups of three. 



Thorn. A sharp woody outgrowth in the position of a lateral branch. 



Tolerant. Capable of enduring shade. 



Tomentose. Densely pubescent with matted wool or tomentum. 



Tomentulose. Slightly pubescent with matted wool. 



Torulose. Cylindric, with swollen partitions at intervals. 



Tree. A plant with a woody stem, unbranched at or near base, 

 and at least 8 feet in height and 2 inches in diameter. 



Truncate. Ending abruptly, as if cut off" at the end. 



Tubercle. A small tuber or excrescence. 



Turbinate. Top-shaped. 



Twig. A young woody stem; more precisely the shoot of a woody 

 plant representing the growth of the current season. 



Umbel. A simple inflorescence of flowers with pedicels all arising 

 from the same point. 



