heterotactic 



(ADDITIONS) 



Hypnetum 



(Eriksson) ; heterotac'tic (TO.KTIKOS, 

 qualified to arrange), with more 

 than one system in the same in- 

 florescence ; Het'erotroph, em- 

 ployed by Pfeffer to denote a pure 

 saprophyte ; hexacy'clic (KVK\OS, a 

 circle), arranged in six whorls ; 

 hexaphylet'ic (<j>v\ii, a tribe), 

 applied to those derivative hybrids 

 which are the product of six forms 

 or species, as in eome willow- 

 hybrids. 



histi'oid (efSos, resemblance), arach- 

 noid (Heinig). 



Eof (Germ., a court), (1) the areola 

 of a bordered pit ; (2) Rosen's ex- 

 pression for a clear, granule-free 

 space surrounding the nucleus or 

 nucleolus. 



holochlamyd'eous (xXa,ui)j, a cloak), 

 employed for ovules such as 

 those of Gingko when the integu- 

 ments are practically complete 

 (Celakovsky). 



homoblas'tic, add (2) used by Goebel 

 to express the fact that the larval 

 and adult forms are practically 

 the same ; (3) Pfitzer employs it 

 for those Orchids whose pseudo- 

 bulbs consist of several internodes, 

 only the terminal bearing de- 

 veloped leaves ; Homodichog'amy 

 ( + DICHOGAMY), the existence of 

 homogamous and dichogamous 

 individuals in the same species ; 

 homoet'ic, metamorphic, cf. Ho- 

 MOEOSIS ; Homog'amy, add ; (2) 

 independently coined by G. J. 

 Romanes to express " discriminate 

 isolation " ; Homogen'esis, Homog'- 

 eny, the reverse of HETEROGENESIS ; 

 the successive generations resem- 

 bling the parent form ; Homon'ymy, 

 the possession of the same specific 

 name under another genus ; Homo- 

 ne'meae (VTJ/J.O., a thread), formerly 

 applied to Algae and Fungi 

 (Henslow) ; homotac'tic (TO.KTI.KOS, 

 apt to arrange), when only one 

 system of arrangement prevails in 

 an inflorescence. 



Hon'ey-leaves, nectaries such as those 

 of Aquilegia (Potter). 



Hor'dein, a special proteid occurring 

 in barley, Hordeum vidgare, 

 Linn. 



nusk'less, wanting the usual outer 

 covering, as in certain forms of 

 barley, walnuts, etc. 



Hy'alosomes (crcC^a, a body), colour- 

 less granules which do not take 

 up stains. 



Hyb'ridoform (+ FORM), a hybrid be- 

 tween FINIFORMS (Kuntze) ; Hy- 

 bridopro'liform (proles, offspring), 

 a fertile hybrid of HYBRIDOFORMS 

 (Kuntze). 



Hydras'tin, an alkaloid found in 

 Hydrastis canadensis. Linn. 



Hydrocleistog'amy ( + CLEISTOGAMY), 

 when flowers do not open in con- 

 sequence of submersion (Knuth) ; 

 Hy'drogams (ya.fj.os, marriage) = 

 CRYPTOGAMS ; Hy'drolyst = HYDRO- 

 LIST ; Hy'drolyte, the substance 

 which undergoes fermentation 

 (Armstrong) ; Hydromeg'atherm 

 (fjtya, great, 6epfj.rj, heat), Warm- 

 ing's term for a plant which 

 needs much heat and moisture, 

 as the natives of moist tropical 

 regions. 



hydrophylla'ceous, pertaining to Hy- 

 drophyllum or its allies. 



Hydroste'reids (crrepeos, solid), pro- 

 senchymatous thick-walled ele- 

 ments, with conspicuous pits, but 

 without spiral thickening on the 

 walls (Haberlandt) ; Hydrotax'is 

 (rdts, order), creeping from dry to 

 moist situations, as plasmodia (Ver- 

 worn) ; hygroph'ilous, pertaining 

 to Hygrophytes ; hygroph'orous, 

 water-bearing, or saturated with 

 it ; applied by Spruce to certain 

 Hepaticae. 



j Hy'phal Bod'ies, short thick hyphae 

 in certain Fungi, which produce 

 fructifying hyphae or conidio- 

 phores (Thaxter). 



Hyphydrogam'icae (viro, under, vSup, 

 water, yd/j.os, marriage), plants 

 whose flowers are fertilized under 

 water, as Najas (Knuth) ; Hyphy- 

 drog'amy, the condition specified. 



Hypne'tum, a plant-association com- 



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