Medicagophyll 



Meiotherm 



Medica'gophyll (Medicago, Tourn., + 

 phyll), the characteristic chloro- 

 phyll of Lucerne, Medicago sativa, 

 Linn. 



medifix'us (medius, middle, fixus, 

 fastened), fixed by the middle ; 

 Mediocor'tex( + CORTEX), the central 

 layer or layers of the bark. 



medio'cris (Lat., middling), inter - 

 med iate. 



mediterra'neus (Lat., midland), (1) 

 inhabiting spots far from the sea ; 

 (2) occurring in the Mediterranean 

 region. 



medival'vls (medius, middle, valva, 

 a valve), arising from, or on the 

 middle of the valves. 



Medulla (Lat., pith, marrow) ; (1) the 

 pith ; (2) the central looser portion 

 of the flesh in certain Fungi ; (3) the 

 " Mattulla " of palms (Stormonth) ; 

 <~ Se'minis J the albumen of seeds ; 

 medullary, medulla' ri.^ (Lat. , seated 

 in the marrow), relating to the 

 pith, pithy ; ~ Bun'dles, the more 

 lateral vascular bundles of the leaf- 

 trace in Monocotyledons ; ~ con- 

 junc'tive Tis'sue = PITH; ~ Crown, 

 ~ SHEATH ; ~ Phlo'em Bun'dles, 

 independent phloem bundles de- 

 veloped just within the ring of 

 normal vascular bundles ; <~ Rays, 

 plates of parenchyma or cellular 

 tissue radiating from the pith to 

 the cortex; the "silver-grain" of 

 joiners ; ~ Sheath, tracheids form- 

 ing a circle round the pith, the 

 primary xylem bundles projecting 

 into the pith from the cambium - 

 ring ; ~ Spot, an accumulation of 

 patenchytuatous cells in certain 

 woods, as Alnus (De Bary) ; ~ 

 Sys'tem, sometimes used for the 

 whole ground tissue, but more 

 properly the pith and medullary 

 rays only ; Medullin, the cellulose 

 from pith of the sun-flower and 

 lilac (Braconnot); Medulli'na (Lat. ) 

 = PITH; medullo'sus (Lat., mar- 

 rowy), having the texture of 

 pith. 



megaceph'alus (/?7as, large, Ke^aX-ij, 

 head), used of large capitula of 



Compositae ; Megacon'ids (/com, 

 ashes), Zukal's term for the large 

 conidia borne in pycnidia of certain 

 Ascomycetes ; Megagam'etes (ya/j.e- 

 TJ/S, a spouse), the larger motile 

 sexual cells of Algae, presumably 

 female. 

 Megalogonid'ium (/j.jd\os, large + 



GONIDIUM) = MACROGONIDIUM. 

 megarhi'zous (/j-eyas, large, pifa, a 

 root), large -rooted ; Megasporan'ge 

 [four syll.] (ffiropa, seed, dyyeiov, 

 a vessel), a Sporangium which pro- 

 duces Megaspores ; Meg'aspore, the 

 larger spores of vascular Crypto- 

 gams ; the morecorrect form of MAC- 

 ROSPORE ; Megaspor'ophyll (cpv\\ov, 

 a leaf), (1) a carpel ; (2) a sporophyll 

 which bears megaspores ; Mega- 

 zo'oids (fcDoo, an animal, 5os, resem- 

 blance), large motile daughter-cells 

 of certain unicellular Algae (Hazen); 

 Megazoosporan'ge (a-rropd, a seed, 

 dyyetov, a vessel), in Hydrodictyon, 

 the special sporangium which con- 

 tains a swarm of megazoospores, 

 the ordinary method of propaga- 

 tion, the protoplasm of a cell giving 

 rise to a large number, each pro- 

 vided with four cilia. 

 Megis'totherm ( /Aeyurros, greatest, 

 6ep/j.i], heat), a plant requiring a 

 very high temperature for growth, 

 meiogy'rous (/j.eiui>, less, yvpbs, round), 



rolled inwards a little, 

 mei'on (fj.elov, less), prefixed to an 

 organ, shows it is less than some 

 other organ understood ; Meio- 

 phylly (<pv\\ov, a leaf), diminution 

 in number of the leaves in a whorl, 

 as compared with the preceding 

 whorl ; Meiosporan'ge ( + SPOR- 

 ANGIUM), Sauvageau's name for the 

 smaller plurilocular sporangia en- 

 closing zoospores of Ectocarpus 

 virrscens, Thuret ; meioste'monous 

 (ffrrifjiuv, a filament), with fewer 

 stamens than petals ; Meiotax'y 

 (rctjfis, order), the suppression of 

 entire whorls ; Mei'otherm (dep/nrj, 

 heat), a plant inhabiting cool tem- 

 perate regions ; all are hardy in 

 England. 



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