Hydrion 



Idiochromosomes 



Hydri'on {-f- Ion), hydrogen-ion 

 concentration (Herklots); Hydro- 

 cleistog'amy, cleistogamous flowers 

 pollinated by submersion; Hydro- 

 crypt'ophytes, pi. vegetative parts 

 permanently in water (Gams). 



Hydrochare'tum, an association of 

 Hydrocharis Linn. (Gadeceau). 



hy'droid {dSos, resemblance), used 

 by Clements for watery ; '^ Ar'eas, 

 of algae climaxes in pre-Devonian 

 times {id.); Hydromorpho'sis, add, 

 (2) change due to watery situation 

 (MasBart). 



Hydronarde'tam, an association of 

 Nardus stricta Linn. 



hydroperm'eable {permeabilis, that 

 may be passed through), parts 

 of roots specialized for water 

 absorption (S. Baker); Hy'drose, 

 the internal moisture of tissues 

 (Devaux) ; Hy'drosere (+ Sere), 

 succession in a wet habitat to a 

 climax (Clements) ; hydrospher'ic 

 (CT^atpa, a globe), the agency of 

 water in migration (Adams) ; 

 Hydrospor'ae, pi. {onopd, a seed), 

 plants whose seeds are distributed 

 by water (Clements); hydrotrop'ic 

 {Tpotrrj, a turn), changing to a 

 greater water-content of a succes- 

 sion {id.); hydrostat'ic {ardais, a 

 standing), a succession less prone 

 to change towards greater moisture 

 {id.); Hydrox'yl I'ons {o^vs, sharp, 

 -f Ion) water-ions negatively 

 charged with electricity ; OH- ; 

 opposed to hydrogen-ions. 



Hygrodry'mium ( Spu^w)?, a wood), rain- 

 forest (Diels) ; Hygrophor'bium 

 {<f>opp-q, pasture), moist pasture or 

 fen-lands {id.); Hygropoi'um {iroay 

 grass), evergreen meadows {id.); 

 Hygrosphag'nium, high moor, cf. 

 Sphaqniopratum. 



Hyli'on, originally Hyli'nm, forest 

 climax (Clements) ; hyloc'ola, 

 forest dwelling ; Hy'lophyte {<f>vT6v, 

 a plant), a dry woodland plant; 

 cf. Hylodophyte. 



hymenomyce'te, fructification re- 

 sembling that of Hymenomycetes 

 (Rayner). 



Hyperchro'masy {xpcofJ-a, colour), an 

 increase of the nuclear substance 

 relatively to the cytoplasm {Slin- 

 chin) ; Hyperplasia {TrXaaroSy 

 formed), an abortive quantitative 

 increase produced by cell-division 

 (Virchow) ; hyperton'ic {tovos, 

 strain), having a greater osmotic 

 concentration than the cell-sap 

 (Stiles) ; Hyper'trophy {rf>o<f>-q, 

 food), abnormal growth with volu- 

 minous callus (Harshberger). 



Hy'poderm, add, (2) Kraus's term 

 for the outer cortex immediately 

 below the epidermis, as in Begonia 

 Linn, and fossil plants ; hypog'ynoas, 

 add, (2) when the antheridia are 

 below the oogonia, as in Phyto- 

 phthora De Bary (Murphy); Hy'- 

 ponym {ovofia, a name), a generic 

 name not supported by a type- 

 specimen. 



hypophae'ns (uTro^atos, somewhat 

 grey), grey in tint. 



Hypopod'inmy Bower's term for the 

 basal part of the leal. 



Hy'postase, add, (2) tissue containing 

 chromatic substance in the chalazal 

 region (Ishikawo) ; hypostatic, 

 Bateson's equivalent for recessive ; 

 lower, of Hurst; cf. epistatic ; 

 hypostom'atal = hypostomatous ; 

 hypoton'ic, having a lower osmotic 

 concentration than the cell -sap 

 (Stiles); hypotrip'loid (+ triploid), 

 having fewer chromosomes than 

 the triploid number (De Mol). 



I^. Symbol for parent of self -fertile 

 plant, amidst incompatibles (Heri- 

 bert Nilsson) ; his Ij = Fj, 

 I3 = F2, etc. 



Idiobiorogy, proposed in place of 

 AuTOBiOLOOY (Gams) ; pertaining 

 to individual organism (Turesson) ; 

 Idiochorol'ogy, for Autochoroloqy, 

 applied to self -distribution of plants 

 as distinct and separate units 

 (Gams); Idiochro'matin (+ Chro- 

 matin), chromatin temporarily 

 dormant (Minchin) ; Idiochromid'ia, 

 pL, chromidia of a generative char- 

 acter; Idiochro'mosomes pi. ( + 



444 



