Hexagonienchyma 



Hinge 



angle ; $yxvfia, an infusion), cellu- 

 lar tissue which exhibits hexagonal 

 cells in section ; hezag'onoid {eUos, 

 like), J. Smith's term for hexagonal 

 areolae on Ferns, which are bor- 

 dered by veins ; hexag'onus, six- 

 angled; Kex&gyn'ia. {yvv^, a woman), 

 a Linnean order of plants possessing 

 six pistils ; hexagyn'ian, plants be- 

 longing to that order, or having its 

 character ; hexag'ynous, with six 

 pistils ; hexalep'idus (\€7rts, XcirlSos, 

 a scale), six-scaled ; hexam'erous, -rus 

 {fifpos, a part), in sixes; hexan'der 

 {av^p, avSpos, a man), having six 

 stamens ; Hezan'dria, a Linnean class 

 characterized by the possession of six 

 stamens ; hexan'drian, relating to 

 that class ; hexan'drous, with six 

 stamens ; Hexand'ry, the state of 

 possessing six stamens ; hexapet'aloid 

 (elSos, like), having a i)erianth of six 

 pieces, which resemble petals ; hexa- 

 pet'alous {TTCTaKov, a tlower leaf), with 

 six petals ; hexaphylet'ic {<pv\^, a 

 tribe), applied to those derivative 

 hybrids which are the product of 

 six forms or species, as in some 

 willow-hybrids; hexaphyl'lous, -las 

 {<pv\\ov, a leaf), six-leaved; Hex'a- 

 pod (irof's, iroShs, a foot), a fathom 

 of six feet, used sometimes as a 

 measure of altitude ; hexap'terous, 

 ■ rus {irrepov, a wing), six-winged ; 

 hexapyre'nus {wphv, a kernel), 

 having six kernels ; hex'arch {apxh, 

 beginning), applied to a stele with 

 six strands or origins ; hexari'nus 

 i&pprfu, male), Necker's synonym 

 for hexandrous ; hexasep'alus, -lus 

 ( + Srpalum), with six sepals ; 

 hexaste'monous, -nus [ar-hfiwv, sta- 

 men), hexandrous,. six-stamened, 

 hi'and (Lat. ), gaping, as a ringent 



corolla, 

 Hibem'acle, Hiberna'culum (Lat., a 

 winter room), (1) a winter bud; 

 (2) in botanic gardens, the winter 

 quarters for plants, especially j>lant 

 houses and frames ; hiber'nal, 

 hiherna'lis (Lat.), pertaining to 

 winter ; Hiberna'tion, passing the 

 winter in a dormant state. 



Hiber'nian, H. C. Watson's term for 

 those plants of the United Kingdom 

 whose headquarters appear to be in 

 Ireland (Hibernia). 



hid'den, concealed from view ; '^ 

 veined, with veins which are not 

 obvious, as in Pinks and House- 

 leeks, by excess of parenchyma. 



hide-bound, a cultivator's expression 

 when the bark does not yield to the 

 growth of the stem. 



Hid'roplank'ton {Ihpws, sweat ; -f 

 Plankton), organisms which float 

 by virtue of some secretion (Forel). 



hi'emal, hiema'lis (Lat.), relating to 

 winter; Hiemisil'vae {silva,a, wood), 

 woods in which the trees shed their 

 leaves in the dry summer season. 



Hieraciorog^st {K6yos, discourse), an 

 expert in the genus Hieracium. 



High'land, used by H. C. Watson 

 for a type of distribution in Great 

 Britain, of those plants chiefly found 

 in the H ghlands of Scotland. 



High-moor, arises in water but emerges 

 from it, and is then dependent upon 

 rain-water ; it is supra-aquatic ; 

 High-yeast, bann, the yeast which 

 forms at the surface ; cf. lovt or 

 bottom yeast. 



hi'lar, hila'rls {hilum, a trifle), relat- 

 ing to the hilum ; Hile (S. F. Gray) 

 = Hilum ; '-' bear'ing, marked 

 with a hilum ; hilif'erous, hi'lifer 

 {fero, I bear), having a hilum on the 

 surface ; Hilof era, the second or in- 

 ternal integument of a seed ; Hi 'lam, 



(1) the scar left on a seed where 

 formerly attached to the funicle or 

 placenta ; (2) the central point in a 

 starch granule which the ring- like 

 markings seem to surround ; (3) 

 X any point of attachment ; (4) 

 X an aperture in pollen gr^iins. 



Hinge, (1) the isthmus of Diatoms ; 



(2) in stomata, delicate lamellae of 

 cellulose, upon which the mobility 

 of the guard-cells usually depends ; 

 they may form an inner or outer 

 hinge ; in German, '* Hautgelenk " ; 



(3) a special part of the stem near a 

 node, between two rigid portions, 



i capable of movement (Kohl) ; -^ 



180 



