Page 19 - Forest Trees of Maine

Sessile Attached directly by the base without an intervening stalk.

Shrub A woody, many-stemmed plant, usually under 15 feet in height at maturity,
which branches from its base.

Simple [leaf] A single leaf composed of a single blade. Not compound.
Smooth Without hairs, glands, or any roughness.
Softwood Term used to describe all needle-leaved trees. These species are typically
evergreen, retaining their leaves through two or more growing seasons. Larches,
including tamarack, are exceptions, being deciduous “softwoods.”

Solid [pith] Without cavities or sections separated by discs.
Spike A flower stalk.
Spinescent Having a spine or spines; or terminating in a spine.

Spur A short, extremely slow-growing, woody twig projection.
Staminate Containing male portions of flowers, or the stamens.
Stipule A tiny, leafy, sometimes spiny projection arising at the base of a petiole.

Stomate Plural stomata Small pore on a leaf used for gas exchange.
Stone The “bony” or stony pit of drupes.
Style The usually slender part of a pistil, situated between the ovary and the stigma.

Toothed [leaf] With moderate projections along the margin.
Tree A woody plant, generally single-stemmed, that reaches a height of more
than 15 feet at maturity and a diameter of 3 inches or more measured at 4½ feet
above the ground.
Umbel A group of flowers or fruit whose stalks have a common point of attachment.

Unequal [leaf base] Base parts of blade on either side of midrib are uneven.
Valve-like [bud scales] Meet at their margins and do not overlap.
Wavy [leaf margin] Undulating but smooth; not toothed nor lobed.
Whorl [leaves or branches] More than two originating at the
same level on a common axis.
Whorled

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