Eztine 



facultative 



Ex' tine {extimus, outside ; + ine), the 

 outer coat of a pollen-gi'ain. 



ex'tra (Lat.), without, beyond, as 

 ex'tra-axiirary, -^ .axilla'ris, he 

 yond, or out of the axil ; '-' -c«ll'u- 

 lar, outside a cell ; -^ -fascic'ular, 

 outside the vascular bundles ; '^ 

 -flor'al, beyond tlie flower, as some 

 nectaries; '-' -foUa'ceous, away 

 from the leaves, or inserted in a 

 ditlerent position from them ; -^ 

 extramat'rical, outside of a nidus or 

 matrix ; Extrameabirity {nieabilis, 

 penetrable), the capacity of proto- 

 plasm to permit substances to pass 

 outwards from its vacuoles (Janse) ; 

 extra (Lat. beyond) -median, beyond 

 the middle ; -- nup'tial, applied to 

 nectaries or honey-glands which are 

 not part of the floral organs ; -*- 

 -ov'ular ( + Ovule), exterior to the 

 ovule ; -- prothall'ial ( -f Pko- 

 THALLUs) originating outside tlie 

 prothallium (Bower); <-' -sac'eal, 

 u«ed of embryos arising outside the 

 cells of the embryo-sac. 



e-itra'rius (Lat., outward), placed on 

 the outside. 



extrasem'inal {extra, without), out- 

 side the seed, as -^ Deveropment, 

 following tlie sowing of the seed, 

 as the escape of the embryo, etc. 



ex'tra (Lat. beyond) -ste'lar, the 

 ground-tissue outside the central 

 cylinder; extra-trop'ical (-f Tropic), 

 beyond the tropics, to the north 

 or south of them ; extravagi"'nal 

 {vngina, a sheath), beyond or 

 outside the sheath, applied to 

 branches springing from buds, 

 which break through the sheath 

 of the subtending leaf, chiefly in 

 grasses ; Extravasa'tion (ras, a 

 vessel), unmtural flow of a liquid 

 from a tissue or organ, as the" 

 " bleeding " of vines ; extra-xy'lar, 

 or ex'tra-xylem'ic (-f Xylem), out- 

 side the xylem (Houlet). 



ex'trorse, cxiror'tnis {exteros, on the 

 outside; i^cvfius, towards), directed 

 outward, as the dehiscence of an 

 anther. 



ex'tus, a modern term = extra ; 



similar in fomi to intus, but not 

 classic Latin. 



Exttda'tion {exudo, or exsudo, I sweat), 

 the transpiration of liquids from 

 hydathodes, etc., as seen on the 

 leaf-tips of Monocotyledons ; '^ 

 Press'ure, PfeflFer's terra for Root- 

 pressure. 



exunguic'ulate {ex, prlv. : nngula, a 

 claw), without a claw (Crozier). 



Exn'eion, Berkeley's term for Exu- 



TATION. 



exu'tive {extUus, drawn off , applied to 

 seeds wanting the usual integument. 



Zxu'viae (Lat. , stripped off clothing), 

 cast-ott' pdrts, as shed scales ; Exu- 

 via'tion, the operation of shedding 

 effete material. 



Eye, (1) a gardener's name for an un- 

 developed bud ; (2) the persistent 

 calvx of a pome, cf. Crown ; (3) a 

 confipicuous spot m a flower or seea, 

 as a blotdh of cokm : (4) = Hilvm : 

 '-' Spot ( 1 ) a coloured spot in a 

 motile gamete or spore, Avhich is 

 sensitive to light ; (2) markings on 

 the silicious valve of Coscinodiscus, 

 consisting of an apeiture with a 

 thickened margin in each alveole ; 

 dor'mant '■^, a bud which is not 

 called into growth. 



faba'ceons, -eus {/aba, a bean ; -f 

 ACEOUs), like a bean, or having its 

 qualities ; fabiform'is {forma), ap- 

 plied to Lichen spores which are 

 bean -shaped. 



Face, that surface of an orgah which 

 is opposed to the back, usually the 

 upper or inner side ; fascial, applied 

 to a hiluni which is on the side and 

 not on the margin of a seed (Heinig). 



Fa'cies (Lat., shape), (1) the general 

 aspect of a plant ; (2) suggested for 

 the dominant species of an asso- 

 ciation, but this usage has been 

 condemned. 



ia,Qi\t'\0ViB, factWiiis (Lat.), artificial. 



Fac'tors, \\. (factor, a maker or doer) 

 the elements which in their entirety 

 make up a character or quality. 



fac'ultative {facuJtas, capability), oc- 

 casional, incidental, as opposed to 



142 



