=Fungus.= A division of cryptogamous plants, including mushrooms, etc.
=Furcation.= Branching.
=Glabrous.= Smooth without hairiness or roughness.
=Glandular.= Bearing glands or appendages having the appearance of glands.
=Glaucous.= Covered with a bloom: bluish hoary.
=Globose= or =globous.= Spherical or nearly so.
=Habit.= The general appearance of a plant.
=Habitat.= The place where a plant naturally grows, as in swamps, in water, upon dry hillsides, etc.
=Hybrid.= A cross between two species.
=Imbricated.= Overlapping.
=Inflorescence.= Mode of disposition of flowers; sometimes applied to the flower-cluster itself.
=Involucre.= Bracts subtending a flower or a cluster of flowers.
=Keeled.= Having a central dorsal ridge like the keel of a boat.
=Key.= A winged fruit; a samara.
=Lacerate.= Irregularly cleft, as if torn.
=Lanceolate.= Lance-shaped, broadest above the base, gradually narrowing to the apex.
=Leaf.= Consisting when botanically complete of a blade, usually flat, a footstalk and two appendages at base of the footstalk; often consisting of blade only.
=Leaf, compound.= Having two to many distinct blades on a common leafstalk or rachis. These blades may be sessile or have leafstalks of their own.
=Leaf, pinnately compound.= With the leaflets arranged along the sides of the rachis.
=Leaf, palmately compound.= With leaflets all standing on summit of petiole.
=Leaf-cushions.= Organs resembling persistent decurrent footstalks, upon which leaves of spruces, etc., stand; sterigmata.
=Leaf-scar.= The scar left on the twig where the petiole was attached.
=Lenticel.= Externally appearing upon the bark as spots, warts, and perpendicular or transverse lines.
=Linear.= Long and narrow with sides nearly parallel.
=Monopetalous.= Having petals more or less united.
=Mucronate.= Abruptly tipped with a small, sharp point.
=Nerved.= Having prominent unbranched ribs or veins.
=Obcordate.= Inversely heart-shaped.
Handbook of the Trees of New England · The Wunder Library — complete classics, free to read, with narration.