2 7 6 



AMERICAN VINES. 



NITROGEN A colourless gas composing four-fifths of the atmosphere 

 by volume. It is incapable of supporting life, but forms many im- 

 portant compounds, as ammonia, nitric acid, etc., and is consti- 

 tuent of all organized living tissues, animal or vegetable. 



NODE (Bot.) The joint of a stem, or the part where the leaf is inserted. 



NODOSITIES Small swellings produced on vine roots by phylloxera. 



NODULE A round mass of irregular shape. 



NORMAL According to an established rule. (Geom.) Perpendicular 

 to a surface or forming a right angle with it. 



NUCLEUS (Bot.) A whole seed, as contained within the seed coats. 



NUTRITION A process or series of processes by which the living organ- 

 ism is maintained in its normal conditions of life and growth. 



NUTRITIVE MATTERS Matters having the quality of nourishing. 



OBTUSE Not pointed or acute; blunt. 



OCHEROUS SOILS Containing an impure earthy ore of iron, or a ferru- 

 ginous clay. Such soils are usuallv red or yellow. 



OOLITIC A great series of secondary rocks, so-called from the texture 

 of some of its members, which appear to be made up of small egg- 

 like calcareous bodies. 



OPERCULUM Any lid-shaped structure in a leaf or flower. 



ORBICULAR Having a spherical form. 



OVATE (Bot.) Having the shape of an egg, that is to say an. oval 

 border at the base. 



OVOID (Bot ) -Resembling an egg in shape. 



OVULE, of plants The seed in the earliest condition. 



OXFORDIAN (Geol.) Applied to rocks of a certain age in the Jurassic 

 series. 



PARABOLA A kind of geometrical curve; one of the conic sections 

 formed by the intersection of the surface of a cone with a plane 

 parallel to one of its sides. 



PARASITE (Bot.) A plant living upon or in another plant. 



PARENCHYMA (Bot.) The soft cellular substance of the tissues of 

 plants, like the pulp of leaves. 



PEDICLE or PEDICEL (Bot ) A stalk which supports one flower or fruit. 

 One of the many divisions of a peduncle. 



PEDUNCLE (Bot ) The stem or stalk which supports a cluster of flow- 

 ers or fruits. 



PENTAGONAL LEAF Having five sides. 



PETALS (Bot.) The leaves of the corolla, a second circle of organs in a 

 flower. 



PETIOLAR SINUS Depression between ^two adjoining lobes into which 

 the petiole is inserted. 



PETIOLE A leaf stalk; the stalk connecting the stem with the blade 

 or limb. 



PHYSIOLOGICAL -Relating to the 'science of the functions of living 

 organisms. 



PHYSIOLOGY Study dealing with vegetable or animal life. 



PINCHING (Hort.) Operation consisting in cutting about one inch off 

 the extremity of young shoots a little before or directly after 

 florescence 



PISTIL (Bot.) The female organs of a flower, which occupy a position 

 in the centre of other floral organs. The pistil is generally 

 divisible into the ovary, the style, and the stigma. 



PITH (Bot.) The soft, spongy substance in the centre of the stem of 

 many plants. 



