Diplobacillus 



Discopodium 



Diplobacill'us (SiTrXo'os, twofold, + 

 BACILLUS), bacilli which are com- 

 posed of two cells, or adhere in 

 pairs ; Diplooacte'ria ( = DIPLO- 

 BACILLTJS) ; diplocaulesc'ens (caules- 

 cens, stem-producng), having axes 

 of the second order ; Diplococ'cus 

 ( + Coccus), a coupled spherule or 

 result of the conjugation of two 

 cells ; diplochlamyd'eous (x^a/mus, 

 a cloak) = dichlamydeous ; having 

 a double perianth. 



Dip'loe (dnr\di], doubling), Link's term 

 for MESOPHYLL. 



Diplogen'esis (dnr\6os, twofold, yevecris, 

 a beginning), doubling of parts 

 normally single ; Diploperisto'mi 

 ( + PERISTOMA), with double peris- 

 tome, applied to Mosses ; diploste'- 

 monous (o-T^/xaw, a stamen), with 

 stamens in two whorls, those of the 

 outer whorl alternating with the 

 petals, the inner whorl alternating 

 with the last ; Diploste'mony, 

 stamens as just described ; diplos'- 

 tic, Van Tieghem's term for root- 

 lets when the mother-root has 

 only two xylem bundles ; Diplo- 

 te'gia, -gis, -giumfrfyos, a covering), 

 a capsule or other dry fruit, in- 

 vested with an adnate calyx ; an 

 inferior capsule ; diploxyl'ic ( v\ov, 

 wood), used of vascular bundles in 

 which the centrifugal part of the 

 wood is secondary. 



Dip'tero-cecid'ia (Sis, two, irrepov, a 

 wing, KTJKIS, a gall), galls produced 

 by dipterous flies ; dip'terous,-M, 

 two-winged, having two wing-like 

 processes ; dipyre'nus (irvprjv, fruit- 

 stone), containing two stones. 



Direc'tion Cells, ~ Corpus'cles, syn- 

 onyms of POLAR CELLS ; 



Direct'-Metamorph'osis, the same as 

 PROGRESSIVE METAMORPHOSIS ; ~ 

 Superposition, the situation of 

 accessory buds in an axil above the 

 leading bud or that first formed 

 (Crozier) ; direc'te - veno'sus, a 

 feather-veined leaf, where second- 

 ary ribs (primary veins) pass direct 

 from mid-rib to margin, digitiner- 

 vius ; directing Leu'cite, = TINO- 



LEUCITE ; directive Spheres, = AT- 

 TRACTIVE SPHERES. 



Direm'ption, Diremptio (Lat., a 

 separation), the occasional separa- 

 tion or displacement of leaves. 



diri'noid, resembling the apothecium 

 of the genus Diriim. 



disappearing, branching in extreme. 



disartic'ulate (dis, apart, articulus, a 

 joint), to separate at a joint, as the 

 leaves in autumn. 



Disc, or Disk (disc' us, a quoit), (1) 

 development of the torus with- 

 in the calyx or within the cor- 

 olla and stamens ; (2) the central 

 part of a capitulum in Compositae 

 as opposed to the Ray ; (3) the 

 face of any organ, in contradis- 

 tinction to the margin ; (4) certain 

 markings in cell-walls, of circular 

 outline ; bordered pits ; (5) the 

 valves of diatoms when circular ; (6) 

 the base of a pollinium; adhe'sive 

 <~, modified tendrils, as in Vitis 

 heterophylla, Thunb. , Ercilla, etc. ; 

 dis'cifer (Lat. ), discife'rous (fero, I 

 bear), disc-bearing, as the wood of 

 conifers ; dis'ciform, disciform'is 

 (jorma, shape), flat and circular, or- 

 bicular ; discig'erous (yero, I bear), 

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

 toms those having valves more or 

 less circular in outline ; Dis'cocarp 

 (Kapwbs, fruit), an ascocarp in which 

 the hymenium lies exposed whilst 

 the asci are maturing ; an apothe- 

 cium ; Discocarplum, a collection 

 of fruits within a hollow receptacle, 

 as in many Rosaceae. 



disc' old discoi'deus (Sio-Kos, a quoit, 

 elBos, like), with a round thickened 

 lamina, and rounded margins ; ~ 

 Flow'ers, those belonging to the 

 disk, usually tubular florets ; ~ 

 Marking, see Disc, 5; discoldal, 

 discoida'ii-i, orbicular ; Discoli'- 

 chenes ( + Lichenes), Wainio's term 

 for DISCOMYCETOUS LICHENS. 



dis'color (Lat. of different colours), 

 used when the two surfaces of a 

 leaf are unlike in colour. 



Discopodium (&O-KOS, a quoit, TroCs, 

 os, a foot), a disc-shaped floral 



79 





