Dictyosporangium 



(ADDITIONS) 



edaphlc 



Dictyosporan'gium (SIKTVOV, a net, + 

 SPORANGIUM), the sporangium of 

 Saprolegnia, with encased spores 

 germinating within the sporangium 

 (Walpole and Huxley) ; Dictyox'- 

 ylon (v\ov, wood), applied to the 

 cortex of a fossil stem possessing 

 a netted system of hypodermal 

 fibrous strands, asiuLyginodendron 

 (Scott). 



Dlentomoph'ily (+ ENTOMOPHILY), 

 when in a species, some individuals 

 are adapted for insect-fertilization 

 by a different group of visitors 

 from the remaining individuals 

 (Engler and Prantl) ; Dimonoe'- 

 cism ( + MONOECISM), the condi- 

 tion of two out of three kinds of 

 monoecious flowers, having perfect 

 flowers, and (a) male, (b) female, or 

 (c) neuter flowers also (Knuth). 



Dictyu'chus State of Saprolegnieae, 

 = DICTYOSPORANGIUM (Hartoy). 



Di'odange ( + DIODE, dyyelov, a vessel), 

 a group of diodes surrounded by one 

 or more layers of sterile cells (Van 

 Tieghem). 



diplos'tichous (arlxos, a row), in two 

 series or rows ; diplox'ylous, dip- 

 loxylic. 



Dis'cals, Bessey's proposed abbrevia- 

 tion of Disciflorae, a series of poly- 

 petalous Phanerogams. 



Disc or Disk, add (7) the expanded 

 base of the style in Umbelliferae ; 

 (8) in a bulb, the solid base of the 

 stem, around which the scales are 

 arranged. 



Discentra'tion (dis, apart, centrum, 

 centre), used by C. F. Schimper 

 for (a) fasciation of the axis, and 

 (b) multiple of a leaf-organ (Pen- 



Discnis'ma (Sis, two, O-X^MCI, separa- 

 tion), the fruit of Platystemon, 

 which divides into longitudinal 

 carpels, each of which again 

 divides transversely. 



disjunc'tive (disjunctivus, disjoined) 

 Symbio'sis, applied by Frank to 

 those cases in which the sym- 

 bionts do not form an associated 

 organism, but are temporarily 



associated, as in the case of insects 

 and plants. 



Dis'trophy (rpo<f>ri, nourishment), em- 

 ployed by Re for disparity in size 

 of homologous organs. 



dodecan'der, dodecandrous. 



dolicnosty'lous ( + STYLE), in dimor- 

 phic or trimorphic species applied 

 to the long-styled form. 



Dom'itoform (domitus, tamed, forma, 

 form), a cultivated form, the 

 original being unknown or dis- 

 similar (Kuntze). 



double Fructifica'tion, dimorphism 

 in fruit, applied to certain Algae ; 

 ~ Nee'dle, in Sciadopitys, a dwarf 

 branch without bud-scales, the two 

 leaves being fused together at the 

 edges into one needle. 



Dromot'ropism (p6,uos, a course, 

 Tpo-n-T), a turning), the irritability 

 of climbing plants which results in 

 the spiral growth (Macmillan) ; 

 adj. dromotrop'ic. 



Drupe, false, a nut-like fruit where 

 the lower persistent part of the 

 perianth becomes fleshy, as in 

 Neea. 



du'plicate Par'asitism, self-parasitism, 

 as in the case of mistleto upon 

 mistleto. 



Dy'ad, a subdivision of a TETRAD by 

 mitosis, again dividing into single 

 elements (Calkins). 



dyspho'tic, dysphotis'tic (<us, <UTOS, 

 light), applied by A. F. W. 

 Schimper to the deeper situated 

 BENTHOS ; ~ Plants, are those 

 which are adapted to a minimum 

 of light ; dyst'ropous (T/JOTTT?, a 

 turning), injurious insect-visiting, 

 as far as the flowers are concerned ; 

 Dys'tropy, the condition described. 



ecil'iate ( -f CILIUM), without cilia ; 

 eflagellif'erous ( + FLAGELLUM, 

 fero, I bear), destitute of flagella. 



Ec'topy (^KTOTTIOS, displaced), the 

 abnormal position of an organ. 



edaph'ic (H5a,(j>os, the ground), 

 A. F. W. Schimper's term for the 

 influence of the soil on the plants 

 growing upon it. 



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