=Anther cells=, _n._ The hollow spaces in the anther where the pollen is kept. =Aristocrat=, _n._ From two Greek words meaning “best” and “rule”; one belonging to the best in a community; one among those fit to rule. =Aristocratic=, _a._ Like an aristocrat. =Axil=, _n._ L. _axilla_, little armpit; the angle formed between the upper side of a leaf and the stem or branch to which it is attached. =Azalea=, _n._ The name of a plant. The “swamp honeysuckle” is not a honeysuckle, but is an azalea. B. =Barb=, _n._ L. _barba_, a beard; a tuft of hairs; a sharp point projecting backward from the point of a fish hook or arrow or any other sharp-pointed instrument. The barb prevents the instrument from being readily withdrawn. =Bark=, _n._ The outer covering of the stems and roots of woody plants. =Beak=, _n._ The bill of a bird; the long, projecting point in the fruit of the geraniums. =Bloodroot=, _n._ An early spring flower. A pretty, delicate, white flower opens on a stem that comes up from the ground, and the roots, when wounded, yield a blood-red sap. =Boer=, _n._ D. _boer_, a farmer; a peasant; the name of the Dutch colonists of South Africa. They are principally farmers and cattle raisers. They have had many difficulties with the English settlers, in some of which blood has been shed. =Bract=, _n._ L. _bractea_, a thin plate of metal; gold-leaf. Used of small, usually thin, leaf-like parts, and often found near a flower or flower cluster. =Bulb=, _n._ L. _bulbus_, a bulbous root; an onion; the name of the underground, scale-covered part of hyacinths, etc. C. =Cactus=, _n._ From a Greek word meaning “a prickly plant”; a group of plants which usually grow in dry places and have prickles or thorns instead of leaves. The prickly pear grows wild in northern latitudes, and others, such as the night-blooming cereus, are often seen in hothouses. =Callous=, _a._ L. _callosus_, hard-skinned, thickened and hardened. Applied to a hard place on the skin, usually the result of friction. =Calyx=, _n._ From a Greek word meaning “to cover”; the outer set of envelopes which form the perianth of a flower. If the perianth has but one set of envelopes it is called the calyx. =Capillary attraction=, _n._ The force which causes liquids to disperse through fabrics or tissues. If one end of a towel be placed in a bowl of water, the whole towel will be wet in course of time. =Carbon=, _n._ L. _carbo_, a coal; a substance very widely distributed and existing under various forms. Coal is one form of carbon, graphite another, the diamond a third. One atom of carbon combined with two of oxygen form carbon dioxide.