Diaphototropism 



(SUPPLEMENT) 



Dischisma 



Diaphototrop'ism (5tA, through, + 

 PHOTOTROPISM), the act of placing 

 at right angles to incident light ; 

 adj. diaphototrop'ic. 



dibot'ryal = DIBOTBYOID. 



dichoblast'ic(5tx a > two ways, /3Xaor6s, 

 a shoot), Celakovsky's term for 

 branching intermediate between 

 his aero- and pleuro-blaatic condi- 

 tions, it apparently occurs in the 

 embryo of Pteridophytes ; dicho- 

 dy'namous, dichodynam'ic (Suva/its, 

 power), applied to hybrids in which 

 the characters of both parents are 

 equally represented ; dichopod'ial 

 (ir6diov, a small foot), when an axis 

 repeatedly forks giving rise to an 

 inflorescence termed a Dicho- 

 pod'ium (Pax) ; dichotyp'ic (TVTTOS, 

 type), the appearance of two or 

 more types on the same plant 

 (Focke). 



Dicot'ylae, an abbreviation of Dicoty- 

 ledonae ; dicot'ylous = DICOTYLE- 

 DONOUS. 



dicrana'ceous, resembling the Moss 

 Dicranum. 



Dict'ydin, a substance found by Jahn 

 in Dictydium urribilicatum, as 

 granules which resist both acids 

 and alkalis. 



Dictyosporan'glum (dlKrvov, a net, + 

 SPORANGIUM), the sporangium of 

 Saprolegnia, with encased spores 

 germinating within the sporangium 

 ( Walpole and Huxley) ; Dict'yostele 

 ( + STELE) a stele with large over- 

 lapping leaf -gaps; siphon'ic^- ,when 

 the network of meristeles is simple 

 and tubular (Brebner) ; adj. dicty- 

 OBte'lic ; Dictyox'ylon (v\ov, wood), 

 applied to the cortex of a fossil 

 stem possessing a netted system of 

 hypodermal fibrous strands, as in 

 Lyginodendron (Scott). 



Dictyu'chus State of Saprolegnieae, 

 = DICTYOSPORANGIUM (Hartog). 



Dientomoph'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); Diete'siae 



, annual), perennials with 

 short shoots, long shoots being 

 absent or fugacious (Krause) ; 

 Dimonoe'cism ( + MONOECISM), the 

 condition of two out of three kinds 

 of monoecious flowers, having per- 

 fect flowers, and (a) male, (b) 

 female, or (c) neuter flowers also 

 (Knuth). 



Diffusion, static, in botany, the 

 absorption of gaseous bodies 

 through stomata and diffusion 

 through tissues ; Diffusiv'ity, the 

 ratio of such diffusion. 



Digest'ive-cells, of the mycorrhiza of 

 Neottia ; c/. HOST-CELLS. 



dimeroste'lic (+ MERISTELK), two 

 meristeles or vascular bundles 

 (Brebner). 



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

 a group of diodes surrounded by 

 one or more layers of sterile cells 

 (Van Tieghem). 



Dioe'cism, the condition of dioecious 

 plants or flowers. 



Dip'lonasty (wurrto, pressed close), 

 when organs grow faster on the 

 upper and the under surfaces than 

 on the sides. 



diplox'yloid, resembling the genus 

 Diploxylon (Williamson). 



diplos'tichous (a-ri^os, a row), in two 

 series or rows ; diplox'ylous = DIP- 



LOXYLIC. 



Disassimila'tion, the breaking down, 

 katabolism of plants. 



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. 



Dis'cals, Bessey's proposed abbrevia- 

 tion of Disciflorae, a series of poly- 

 petalous Phanerogams. 



Discentra'tion (dis, apart, centrum, 

 centre), used by C. F. Schimper 

 for (a) fasciation of the axis, and 

 (6) multiple of a leaf -organ (Penzig). 



Dischis'ma (Sis, two, <rxTAca, separa- 

 tion), the fruit of Platystemon, 

 which divides into longitudinal 

 carpels, each of which again 

 divides transversely. 



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