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GLOSSARY OF BOTANICAL TERMS. 



Deltoid. — Triangular, somewhat like the 

 Greek letter //. A term descriptive of 

 the shape of certain organs, as some 

 leaves, ovaries and stigmas. 



Dentate. —Applied to leaves or other flat- 

 tened organs that have their margins 

 toothed with acute teeth that point per- 

 pendicularly outward from the margin. 



Denticulate. — Dentate with minute teeth. 



Depauperate. — Impoverished. Applied to 

 a plant or organ that from lack of nourish- 

 ment or by reason of other unfavorable 

 conditions has not attained full develop- 

 ment. 



Dermatogen. — The layer of cells, in a 

 young or growing part, that is destined to 

 become epidermis. 



Determinate. — Applied in botany to an 

 inflorescence in which the blossoming 

 takes place centrifugally, the blossoms 

 being from terminal and not from axillary 

 buds. 



Dextrine. — A substance resembling starch, 

 but soluble in cold water. 



Diadelphous. — In two brotherhoods. Ap- 

 plied to stamens when cohering bv their 

 filaments into two sets. 



Disastase. — An unorganized ferment found 

 in germinating cereals, etc. 



Diageotropic. — Applied to an organ that 

 grows in a direction at right angles to 

 that in which the force of gravity is ex- 

 erted. 



Diandrous. — Possessing two stamens. 



Diarch. — A term descriptive of radial fibro- 

 vascular bundles having two rays. 



Dicarpellary. — Possessing two carpels. 



Dichasium. — An inflorescence on the plan 

 of a false dichotomy. 



Dichlamydkous. — Applied to flowers that 

 possess both calyx and corolla. 



DicHtiTOMous. — Forking; dividing into two 

 equal branches. 



Dichotomy. — A forking. 



Diclinous. — Having the stamens and pistils 

 in separate flowers. 



Dicotyledon. — A plant whose embryo has 

 two opposite cotyledons; the name of a 

 sub-class of the Phanerogamia. 



Didynamous. — Having the stamens in two 

 pairs, one of the pairs longer than the 

 other. 



Diffuse. — Widely spreading. Applied to 

 the habit of growth of certain stems and 

 branches. 



Digitate — Applied to a compound leaf in 



which the leaflets all radiate from the top 



of the petiole. 

 Dimerous. — In two parts. Referring to a 



flower constructed on the numerical plan 



of two. 

 Dimidiate. — Applied to an anther whose 



lobes are widely separated by a broad 



connective. 

 Dimorphism. — Possessing two forms of 



flowers, one with short styles and long 



stamens, the other with long styles and 



short stamens. 

 Dkf.cious. — In two households. With 



staminate and pistillate flowers separate 



and on separate plants. 

 Dipetalous. — Two-petaled. 

 Discocarp. — The same as Apothecium. 

 Discoid. — Disc-like. Descriptive of the 



shapes of certain stigmas, receptacles, 



etc. 

 Dissepiment. — A partition in a fruit. 

 Distichous. — -In two perpendicular rows; 



applied to the arrangement of leaves or 



other organs. 

 Divergent. — Inclining away from each 



other. 

 Dolabriform. — Shaped like an axe. 

 Drupe. — A stone-fruit, as those of the 



Cherry, Peach and Plum. 

 Drupelet. — A small drupe. 

 Duct.— A tube formed by the confluence of 



two or more cells, found in the fibro- 



vascular system of plants. Synonymous 



with vessel. 

 Dumose. — Bushy, or pertaining to a bush. 

 Dumetose. — Belonging to a thicket. 

 Duramen.— Heart-wood. 



"PCHINATE.— Beset with prickles. 



Echinulate. — Beset with prickles of small 



size. 

 Egg-apparatus. — The oosphere and the 



two companion cells called the synergidae 



in the upper end of the embryo-sac, are 



termed the egg-apparatus. 

 Elaters. — Thread-like, usually spirally 



coiled bodies found in the sporangia of 



Liverworts and Equisetum. They aid in 



ejecting the spores when they are ripe. 

 Eleutheropetalous. — The same as chori- 



petalous. 

 Eleutherosepalous. — The same as chori- 



sepalous. 

 Emarginate. — Notched. Applied to a 



leaf which is uutched at the apex. 



