Medicagophyll 
Meiotherm 
Medica’gophyll (Medicago, Tourn., + 
phyll), the characteristic chloro- 
phyll of Lucerne, Medicago sativa, 
Linn. 
medifix’us (medius, middle, jixus, 
fastened), fixed by the middle ; 
Mediocor’tex( + Cortex),thecentral 
layer or layers of the bark. 
medio’cris (Lat., middling), inter- 
mediate. 
mediterra’neus (Lat., midland), (1) 
inhabiting spots far from the sea ; 
(2) occurring in the Mediterranean 
region. 
medival'vis (medius, middle, valva, 
a valve), arising from, or on the 
middle of the valves. 
Medul'la (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 ¢ the albumen of seeds ; 
medullary, medulla’ris (Lat., seated 
in the marrow), relating to the 
pith, pithy; ~ Bun’dles, the more 
lateral vascular bundles of the leaf- 
trace in Monocotyledons; ~ con- 
june’tive Tis’sue = Piru; ~ Crown, 
=~ SHEATH; ~ Phlo’ém Bun’dles, 
independent phloém 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 
parenchymatous 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 ; Medul'lin, the cellulose 
from pith of the sun-flower and 
lilac (Braconnot); Medulli’na (Lat. ) 
= Pira; medullo’sus (Lat., mar- 
rowy), having the texture of 
pith. 
megaceph’alus (uéyas, large, ceparh, 
head), used of large capitula of 
’ 154 
Compositae; Megacon’ids (xéus, 
ashes), Zukal’s term for the large 
conidia borne in pycnidia of certain 
Ascomycetes ; Megagam’etes (yase- 
Tns, a spouse), the larger motile 
sexual cells of Algae, presumably 
female. 
Megalogonid’'ium (ueyddos, large + 
GonIDIUM) = Macroconipium. 
megarhi’zous (uéyas, large, pita, a 
root), large-rooted ; Megasporan’ge 
(four syll.] (copa, seed, dyyeiov, 
a vessel), a Sporangium which pro- 
duces Megaspores ; Meg’aspore, the 
larger spores of vascular Crypto- 
gams ; the more correct form of Mac- 
ROSPORE ; Megaspor’ophyll (@vov, 
a leaf), (1) a carpel ; (2) a sporophyll 
which bears megaspores; Mega- 
z0 ids ({Gov, an animal, eféos, resem- 
blance), large motile daughter-cells 
of certain unicellular Algae (Hazen); 
Megazoosporan’ge (c7opa, 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 (yéyoros, greatest, 
bépun, heat), a plant requiring a 
very high temperature for growth. 
meiogy rous (elwy, less, yupds, round), 
rolled inwards a little. 
mei’on (yeZov, less), prefixed to an 
organ, shows it is less than some 
other organ understood; Meio- 
phyl'ly (#vAdov, 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 ctocarpus 
virescens, Thuret ; meioste’monous 
(orjuwv, a filament), with fewer 
stamens than petals; Meiotax’y 
(rdé&s, order), the suppression of 
entire whorls; Mei/otherm (éépu7, 
heat), a plant inhabiting cool tem- 
perate regions; all are hardy in 
England. 
