Oichasium 



Dictyogens 



arise from the primary axis below 

 the flower which terminates the 

 apex, the process being repeated 

 by each set of branches ; a two- 

 parted or two-ranged cyme ; dich- 

 ast'ic, spontaneously dividing, 

 dichlamyd'eous (S/xa, in two ; j(XaiJ.us, 

 X^ajxvdos, a cloak), having a double 

 perianth, calyx and corolla ; di- 

 choblas'tic {fihaffrhs, a shoot), (1) 

 suggested by Celakovsky to replace 

 "dicbotomous " when the repeated 

 dichotomy develops into a sympo- 

 dium ; (2) branching intermediate 

 between his aero- and pleuro-blastic 

 conditions, it apparently occurs in 

 the embryo of Pteridophytes ; Dicho- 

 carp'ism {KapirSs, fruit), Cooke's 

 term, for Fungi producing two dis- 

 tinct forms of fructiti cation ; di- 

 morphic as to fruit ; dichody'nam- 

 ous, dichodynam'ic {dvva/jus, power), 

 applied to hybrids in which the 

 characters of both parents are 

 equally represented; dichog'amous 

 {yd/u.os, marriage), hermaphrodite 

 with one sex earlier mature than 

 the other, the stamens and pistils not 

 synchronizing; Dichog'amy, insuring 

 cross-fertilization, by t\ie sexes not 

 being developed simultaneously ; 

 Dichog eny (yivos, offspring), the 

 condition when of two formative 

 impulses, one is set in motion, and 

 the other inhibited (De Vries) ; 

 dichopod'ial {ttSSiov, a small foot), 

 when an axis repeatedly forks, giving 

 rise to an inflorescence termed a 

 Dichopod'ium (Pax) ; dichot'omal, 

 {rSfj-os, a cut), pei-taining to a bifur- 

 cation, as a '^ Flow'er, one seated 

 in the fork of a dichasium ; Dicho- 

 to'mia, forking, as of branches in an 

 inflorescence ; dichotomy ; ~ brachi- 

 a'lis, in Clculophora, the normal fork- 

 ing, the cell-wall remaining un- 

 changed ; -^ conna'ta, the basal cells 

 of the forK grown together ; -^ ma- 

 trica'iis, when the terminal cell 

 forks and the branch and stem are 

 equal in thickness ;~spu'ria, branch 

 and stem of equal size, but the 

 mother cell is bent (Brand) ; dichot'- 



111 



omize, to fork or divide in pairs; 

 dichot'omous, -us, forked, parted by 

 pairs; ~ Cyme, of English authors = 

 Dichasium; Dichot'omy, the state of 

 being repeatedly forked ; — hericoid 

 ~, in each successive forking, the 

 branch which continues to develop is 

 on the same side as the previous one, 

 the other branch aborts ; false -^ , 

 = Dichasium; scorp'ioid '-', the 

 branches develop on each side alter- 

 ately ; dichotyp'ic {tvttos, type), the 

 appearance of two or more types on 

 the same plant (Focke); Dictiot'ypy 

 {tvttos, a type), the occurrence of 

 two diflerent forms of the same 

 stock; Dicle'sium {kXtjctis, closing), 

 an achene within a separate and free 

 covering of perianth, as Mirahilis ; 

 Di'cIiniBm, {kaIvt}, a bed), the separ- 

 ation of pollen and stigma in space, 

 as dichogamy is in time ; di'clinous, 

 unisexual, having the stamens in one 

 flower, and the pistils in another ; 

 Di'cliny, male and female organs 

 separate and in difl"erent flowers; 

 di'coccous, -us {Sis, two ; k6kkos, a 

 kernel), having fruit of two cocci ; 

 dicoe'lous {ko7\os, a hollow), with 

 two cavities. 



Dicot'ylae, an abbreviation of Dicoty- 

 ledoneae ; dicot'ylous = dicotyle- 

 donous, 



Dicotyledo'neae, Dicotyle'dones, Dico- 

 tyle'dons {kotvXtiZwv, cup-shaped 

 hollow, used for seed-lobe), plants 

 of the class denoted by their posses- 

 sion of two cotyledons; dicotyle'- 

 donous, — nus, having a pair of seed- 

 lobes; Dicot'yls, an abbreviation for 

 Dicotyledons. 



dicrana'ceous, resembling the Moss 

 Dicranum, 



Dict'ydin, a substance found by Jahn 

 in the Myxomycete Didydiuni umbi- 

 licatum, as granules which resist 

 both acids and alkalis. 



dictyodes'mic {Biktvou, a net ; dfafios, 

 a bond), the vascular network in 

 Ferns so termed by Brebner ; dic- 

 tyod'romous {Sp6fMos, a course), with 

 reticulate venation ; Dic'tyogens 

 {yevyauf, I bring forth), plants having 



