GLOSSARY OF TERMS AND INDEX TO PART I 211 



Sheath. A tubular envelope. 



Shoot. A branch. 



Shrub. A bush-like plant ; one branching from near the base, 11. 



Silver grain. Medullary rays, 13, 36. 



Simple leaf. One with but a single blade, 19. 



Sinuate. With a margin strongly wavy, 22. 



Sinuation. One of the waves of a sinuate edge. 



Spatulate. Gradually narrowed downward from a rounded tip. 



Spike. An elongated cluster of flowers with the separate blossoms 

 about sessile. 



Spine. A sharp, rigid outgrowth from the wood of a stem ; some- 

 times applied to sharp points not so deeply seated which should be 

 considered as prickles, 28. 



Spinescent or spiny. Having spines, 22, 23. 



Spray. A collection of small shoots or branches of a plant. \ 



Stamen. One of the pollen-bearing or fertilizing parts of a 

 flower, 24. 



Staminate. Said of flowers which have stamens but no pistil, 25. 



Stellate. Branching, star-like. 



Stems and branches, 11. 



Stipules. Small blades at the base of a leafstalk, 19. 



Straight-veined. Feather-veined with the veins straight and 

 parallel, 20. 



Striatc. Marked with fine longitudinal lines or ridges. 



Sub. A prefix applied to many botanical terms, and indicating 

 nearly. 



Subulate. Awl-shaped, 21. 



Succulent. Thick and fleshy, 23. 



Suckers. Shoots from a subterranean part of a plant. 



Surface of leaves and fruit, 23. 



Tangential section of wood, 35. 



Tapering. Gradually pointed ; gradually narrowed, 21. 



Tap-root. A simple root with a stout tapering body, 9. 



Terete. Cylindric, but tapering as the twigs of a tree. 



Terminal. Belonging to the extremity of a branch, as a terminal 

 bud, 14 ; or terminal flower-cluster, 26. 



Texture of leaves, 23. 



Thyrsus. A compact, much-branched flower- or fruit-cluster, 26. 



Tomentose. Covered with matted, woolly hairs, 23. 



Toothed. With teeth or short projections. 



Tree. A plant with a woody trunk which does not branch near the 

 ground, 11. 



Truncate. With a square end as though cut off, 22. 



