disciferons 



Bissemination 



bear), disc-bearing, as the wood of 

 conifers ; dis'ciform, disciform'is 

 {Jorirta, shape), flat and circular, 

 orbicular ; discig'erous {gero, I bear), 

 disc-bearing ; ~ Frus'tules, in Dia- 

 tonis those having valves more or 

 less circular in outline. 



Dis'cocarp (SiV/cos, a quoit ; Kafmhs, 

 fruit), an ascocarp in which the 

 hymenium lies exposed while the 

 aaci are maturing ; an apotheciura ; 

 Discocarp'imn, a collection of fruits 

 within a hollow receptacle, as in 

 many Rosaceae ; disc^oid, discoi'deus 

 {flSos, like), with a round thickened 

 lamina, and rounded margins ; --' 

 Flow'ers, those belonging to the 

 disk, usually tubular florets ; '- 

 Glands, stalked glands of Urticaceae 

 with round head of a single layer of 

 cells ; '^ Mark'ing, see Disc, (5) 

 disco'idal, discoida'Hs, orbicular ; 

 Discoli'chenes (-f-Lichenes), Wainio's 

 term for Discomyce'teg, Fungi with 

 open hymenium, as Pcziza. 



dis'color (Lat. of different colours), 

 used when the two surfaces of a 

 leaf are unlike in colour. 



discontin'ucus Varia'tion, forms arising 

 at a single step with complete and 

 definite characters of other species. 



Discoplank''ton [Sia-Kos, a quoit, + 

 Plankton), floating diatoms of 

 discoid forms,chiefly oiCoscinodiscns; 

 Discopod'ium (iroOs, ?ro5o$, a foot), a 

 disc-shaped floral receptacle ; disc'- 

 ous, the same as discoid (Crozier), 



discrete', discre'tus (Lat., parted), 

 separate, not coalescent. 



Disc'ulus (dim. of Discus), the adven- 

 titious lobule of Hepaticae (Spruce). 



Disc'us (Lat. from UaKos), (1) see Disc ; 

 (2) a flat stroma through Avhich the 

 ostioles of fungi protrude, as in Falsa. 



disep'aloua, -7(s {5U, two, + S£palttm), 

 of two sepals. 



dishannon'ic, used of a flora showing 

 gaps in series and with many mono- 

 typic genera. 



Disjunc'tion {disjunctio, separaMon), 

 see Dialysis, Fissiox, Solution, 

 varying degrees of separation in 

 organs ; Disjunc'tor, Woronin's 



term for a spindle-shaped cellulose 

 connection between the gonidia in 

 certain Fungi ; the developed septum, 

 as in Sclerotinia^ Vaccinii, "Woron. 



disjunc'tive {disjtnictivtit, disjoined) 

 Symbio'sis, applied by Frank to 

 those cases in which the symbionts 

 do not form an associated organism, 

 but are temporarily associated, as in 

 the case of insects and plants. 



Disk, see Disc. Disk is the more 

 usual spelling in the case of Com- 

 positae, as -^ Flor'ets, '^ Flow'ers, 

 those occurring on the central 

 portion of the capitulura of com- 

 positae, not of the ray (or margin) ; 

 '-' shaped = discoid. 



Disloca'tion {dis, apart ; locus, a place) 

 = Displacement ; Disloca'tor Cell, 

 in Gymnosperms, a wall-cell derived 

 from the antheridial mother-cell 

 which sets loose the spermatocyte 

 from its attachment (Goebel) ; 

 disoperc^ulate {operculum), a lid), 

 deprived of the cover or lid. 



disperm'ous {Sis, double ; a-nepfMa, a 

 seed), two seeded. 



Disper'sal, Tispers^ion {dispersus, 

 scattered), the various ways by 

 which seeds are scattered, by wind, 

 birds, adhesion to animals, etc. ; 

 in Ger. Verbreitungsmittel. 



Dispi'rem (Sis, two, -f Spirem) a 

 stage in nuclear division, having two 

 chromatic groups, the achromatic 

 filaments being constricted in the 

 middle, which follows the Dyaster 

 (Rosen). 



dispi'rons {5ls, double ; <nreipa, a coil). 

 Spruce's term for the elaters of Hepa- 

 ticae which have double spirals. 



Displa'cement, the abnormal situation 

 of an organ ; diremption. 



Disposit'io (Lat , arrangement), the 

 manner in which parts are ar- 

 ranged, as " disp. I " indicates that 

 phyllotactic system. 



dissect'ed, dissect'us (Lat., cut up), 

 deeply divided, or cut into many 

 segments. 



Dissemina'tion {disseminatio, sowing), 

 the contrivances by which ripe 

 seeds are shed by the parent plant ; 



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