GLOSSARY. 341 



tTystoliih: a projection of cellulose into the cell-cavity which is 



impregnated with calcic carbonate. 

 Oytoblast : a name formerly used for the nucleus of the cell. 



Daughter-cells : the new or young cells arising from existing cells. 

 Deea (as a prefix) : ten ; as decandrous, with ten stamens. 

 Decandrous : having ten stamens. 

 Deciduous : falling off" early, as deciduous petals ; falling off" at the 



end of the season, as deciduous leaves. 

 Decompound : several times compounded. 



Decumbent : lying on the ground, but the summit tending to rise. 

 Deeurrent : prolonged downwards on the stem. 

 Deeussale : in pairs which cross each other, or placed at right angles. 

 Definite : of a fixed number, (in inflorescence) same as centrifugal. 

 Dehiscence : opening ; mode of opening, as of anthers, etc. 

 Dehiscent : opening regularly. 

 Deliquescent: repeated branching till the trunk disappears in 



branches. 

 Deltoid: triangular. 

 Demulcent : a bland mucilaginous substance which protects the tissue 



from irritation. 

 Dentate : toothed ; with teeth pointing outwards. 

 Denticulate : with small teeth. 

 Depressed : as if flattened, from above. 

 Dermatogen : the epidermis of the growing point. 

 Determinate : fixed ; definite. 

 Di, or Dis (in Greek compounds) : two or double. 

 Diadelphous : filaments united into two sets. 

 Dialypetalous : same as choripetalous or polypetalous. 

 Diandrous : having two stamens. 

 Dichasium : a two-parted or two-rayed cyme. 

 Dichlamydeous : having a calyx and corolla. 

 Dichotomoua : divided into two forks. 

 Dichogamous, Dichogamy: maturity in a perfect flower of either 



the stamens or the pistils in advance of the other. 

 Diclinous : when flowers are of separate sexes. 

 Dicotyledon: an exogenous plant, or one whose embryo has two 



cotyledons. 

 Dicotyledonous : having two cotyledons. 



Didynamous : having two pairs of stamens, with one pair shorter. 

 Diffuse : much and irregularly spreading. 

 Digitate leaf: one with the leaflets attached at a common point or 



end of the petiole. 

 Dimorphism, Dimorphous : having two forms, as two sets of flowers, 



one with long stamens and short pistil, and the other with 



short stamens and long pistil. 

 Dioecious : with staminate and pistillate flowers on different plants. 

 Dipterous : winged. 



Disciform : depressed and circular, like a disk or quoit. 

 Discoid, or Diseaidal ; without rays. 



