e strong veins of a leaf, 19.

_Root_, 9.

_Rugous._ Having an irregularly ridged surface, 23.

_Samara._ A winged fruit; a key fruit, 28.

_Sap-wood_, 13.

_Scabrous._ Rough or harsh to the touch, 23.

_Scale-shaped_, 21.

_Scarious._ Thin, dry, and membranous, 23.

_Scattered leaves_, 18.

_Secondary roots_, 10.

_Section of wood_, 35.

_Seedling._ A young plant raised from a seed.

_Seeds_, 25.

_Sepal._ A division of a calyx, 25.

_Serrate._ Having a notched edge, with the teeth pointing forward, 22.

_Serration._ A tooth of a serrated edge.

_Serrulate._ Finely serrate, 22.

_Sessile._ Without stem; sessile leaf, 20; sessile flower, 26.

_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; sometimes
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.

_Striate._ 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