Wesdphyll 



metabolie 



of a leaf, the whole interior ground 

 tissue of the blade ; (2) the de- 

 marcation be tween leaf and leaf-stalk ; 

 mesophyrious, -lus (/pvWov, a leaf), 

 having leaves of medium length or 

 average size for the genus (Russow) ; 

 Mes'ophyte {(pvThu, a plant) ; (1) 

 Warming's term for those plants 

 which are intermediate between Hy- 

 drophytes and Xerophjtes ; avoid- 

 ing both extremes of moisture and 

 drought ; (2) moist land plants. 

 Mesophyti'a, pi. moist land plant for- 

 mations (Clements) ; mesophyt'ic, 

 relating to plants which require an 

 average amount of moisture only ; 

 Hesophy'tisxn, possessing the power 

 of withstanding a certain amount of 

 aridity ; Mesophyti'um, a mesophytic 

 formation (Clements) ; Mesophy'tum, 

 (1) a name given by Clarion to the 

 Collar or jimctiou of stem and 

 root ; (2) by Lindley given as the 

 demarcation between the internode 

 and petiole ; Mesopod'ium {ttovs, 

 iroShs, a foot), the intermediate part 

 of a leaf, the petiole or leaf-stalk ; 

 mesopro'teoid {Protea, dSos, resemb- 

 lance), leaves which have sclerous 

 cells derived from the middle zone 

 of the mesophyll ( Vesque) ; Meeopte- 

 ride'tum (f^crw, bracken), an associa- 

 tion of Pteris, Eoleus lanatus and 

 Scilla festalis (Woodhead) ; Meso- 

 sapro'bia {oairpis^ rotten; ^los, life), 

 organisms requiring a medium 

 amount of impurity, as Algae in 

 contaminated waters ; Mesosap'ro- 

 phyte (-f Saprophyte), used of 

 Fungi whose mycelium is wholly 

 ■within the host, but whose fruit- 

 bodies are produced externally ; 

 Mes'osperm {a-trfpixa, seed)^ the 

 second membrane or middle coat 

 of a seed, the sarcoderm ; Mes'ospore 

 ((TTTopel, seed), (1) Dietel's terra for 

 an Uredo-siiovc which apparently will 

 only germinate after a resting period ; 

 \2) the middle portion of the spore 

 of /so^^es (Fitting) ; MeBosporin'ium, 

 the middle coat of pollen in An- 

 giosperms (Fitting) ; mesostat'ic 

 {arariKhs, standing), completing the 



succession under mesophytic con- 

 ditions (Clements) ; mesosty'lous 

 (+ Stylus), in trimorphic plants 

 those wb.ich possess flowers hav- 

 ing styles of intermediate length ; 

 Mesothamni'um {ddjxvos, a copse), 

 Diels's term for maquis, formed of 

 hard-leaved shrubs ; Mesothe'cium 

 {9i\Kr\, a case), (1) the intennediate 

 layer of cells in the wall of the 

 anther ; in ripe anthers it often 

 occurs as the inner layer by disap- 

 pearance of the endothecium proper ^ 

 (2) the TiiECiUM of Lichens ; Mes'o- 

 therm {dep/xr}, heat), a plant of the 

 sub-tropical orwarra temperate zones, 

 in Britain needing protection against 

 frost ; adj. mesotherm'ic ; meso- 

 tliermopli'ilus (^^Aew, I love), dwell- 

 ing in the temperate zone ; Meso- 

 thermophy'ta {(pvrhv, a plant), pi. = 

 Mesotijerm ; Mesothennophvti'a 

 temperate plant formation (Cle- 

 ments) ; mesotri'arch (-f triarch), 

 when in a tiiarch stele the two 

 principal xylcm bundles are more 

 or less fused (Prantl) ; mesotroph'ic 

 {rpocp^, food), applied to the peat 

 of transitional moors ; mesotrcp'io 

 (rpoir^, a turning), applied to suc- 

 cessions Avhich become mesophytic 

 (Clements) ; mesoserophyt'ic, mid- 

 way between mesophytic and xero- 

 phytic ; cf. plants aftecting a dryer 

 habitat than pure Mesophytes 

 (Whit ford) ;ineflOxyric {^v\ov, wood), 

 a synonym of mesarch. 

 Mesfi'mates, used by A. C. Jones for 



Symbiokts. 

 Mes'tom or Mes'tome {/xeffThs, replete), 

 Schwendener's term for the ducts of 

 a bundle, those parts which do 

 not conduce to its strength ; cf. 

 Stereome ; Mes'tome-bun'dle, a 

 libro-vascular bundle ; -^ Sheath, 

 bundle-sheath. 

 Metabio'sis {fxera, with ; $ios life), 

 symbiosis, with one of the organisms 

 pi'eparing the way for the other ; 

 not synchronous ; motabio'tic, re- 

 lating to Metabiosls ; Met'ablast 

 {$\d(rros, a bud), the NucELLiis. 

 metaboric (^ucToiSoA^, change), applied 



230 



