Part 58

=Scarf-bark.= The thin, outermost layer which often peels off.

=Segment.= One of the divisions into which a plane organ, such as a leaf, may be divided.

=Sepal.= A calyx leaf.

=Serrate.= With teeth inclining forward.

=Serrulate.= With small teeth inclining forward.

=Sessile.= Not stalked, as when the leaf blade or flower rests directly upon the twig.

=Simple leaf.= Not compound, having one blade not jointed with its stem.

=Sinuate.= Strongly wavy-margined.

=Sinus.= Interval between two lobes or divisions of a leaf; sometimes sharp-angular, sometimes rounded.

=Spatulate.= Gradually narrowed downward from a rounded summit.

=Spike.= A cluster of sessile or nearly sessile lateral flowers on an elongated axis.

=Spray.= The smaller branches and ultimate branchlets of a tree taken as a whole.

=Stamens.= The pollen-bearing organs of a flower, each stamen consisting of a filament (stem) and anther which contains the pollen.

=Staminate.= Having stamens.

=Sterile.= Variously applied: to flowers with stamens only; to stamens without anthers; to anthers without pollen; to ovaries not producing seed, etc.

=Stigma.= Part of pistil which receives the pollen.

=Stipels.= Appendages to a leaflet, analogous to the stipules of a leaf.

=Stipules.= Appendages of a leaf, usually at the point of insertion.

=Striate.= Streaked, or very finely ridged lengthwise.

=Style.= Part of pistil uniting ovary with stigma; often wanting.

=Sucker.= A shoot of subterranean origin.

=Suture.= The line of union between parts which have grown together; most often used with reference to the line along which an ovary opens.

=Terete.= Cylindrical.

=Ternate.= In threes.

=Tomentose.= Densely pubescent or woolly.

=Truncate.= As if cut off at the end.

=Umbel.= An inflorescence in which the flower stems spring from the same point like the rays of an umbrella.

=Verticillate.= Arranged in a circle round an axis; whorled.