hadrocentric 



(ADDITIONS) 



heterophagous 



hadrocen'tric (centrum, the middle) 

 Bun' die, having the hadrome in the 

 centre surrounded by the leptome 

 (Haberlandt) ; Had'romase, an 

 enzyme found in Merulius lacry- 

 mans, Schum., and other Fungi, 

 which attacks the hadrome and 

 destroys its lignified cell - walls 

 (Czapek). 



half-hu'mus Plants, semi-saprophytes. 



halo'nial, used of the fertile branches 

 or tubercles of the fossil Lepido- 

 phloios, formerly considered as be- 

 longing to Halonia, Lindley et 

 Hutt., non Fries. 



Haplan'the (&v9^, a blossom), Hux- 

 ley's term for the hypothetic 

 anemophilous type of the flowers 

 of Gentianaceae ; cf. Journ. Linn. 

 Soc., Bot. xxiv. (1887), 112, 122; 

 haplocau'lous (/caiAos, a stem), 

 having a simple unbranched stem. 



Hekis'totherm (TJKKTTOS, the smal- 

 lest, 6tpfJ.T), heat), a plant which 

 needs but little heat, and can 

 withstand long periods of dark- 

 ness (Warming). 



Heleoplank'ton (eXo?, a marsh, + 

 PLANKTON), the floating vegeta- 

 tion of marshes, which over- 

 powers the animal plankton ; it 

 differs from Potamoplankton by 

 less motion of the water (Zimmer). 



hel'icoid Cells, terminal cells, which 

 are usually branched, of Pitho- 

 phora (Wittrock). 



helminth'oid (e\/Mvs, a worm, 

 eldos, resemblance), worm-shaped, 

 vermiform (Heinig). 



helminthospor 'old ( etSos, r ese mblan ce ) , 

 resembling the genus Helmintho- 

 sporium, Pers. 



hemiangiocar'pic, -pous ( + ANGIO- 

 CARPIC), when the ascocarp 

 (apothecium) is closed at first, but 

 opens when approaching ripeness 

 and discloses the hymenium of 

 crowded asci ; hemichimono- 

 ph'ilous (xeifjL&v, winter, </uXeu>, I 

 love), applied by F. Ludwig to 

 those plants whose above-ground 

 development begins even during 

 the prevalence of frost, as Ran- 



unculus Ficaria, Linn. ; hemich- 

 lamyd'eous (xXayui<s, a cloak), half- 

 coated, as ovules when borne on 

 an inverted symphyllodium iuConi- 

 ferae (Celakovsky) ; Hemicleisto- 

 g'amy ( + CLETSTOUAMY), Knuth's 

 term for the condition of plants 

 whose flowers open slightly ; 

 hemipe'lic (707X65, clay) rocks 

 which yield a moderate amount of 

 clay detritus, and the plants 

 which affect such localities (Thur- 

 mann) ; liemipsam'mic (i^a/z^os, 

 sand), strata which give a mode- 

 rately porous detritus, with the 

 plants which prefer such places 

 (Thurmann) ; Hemiplank'ton ( + 

 PLANKTON), the mingled vegeta- 

 tion of shallow and deep water 

 forms in landlocked pools, etc. 

 (A. F. W. Schimper). 

 heteroblas'tic, add, (2) used by 

 Goebel to express the fact that 

 the adult form of a plant is very 

 unlike the young or larval form : 

 (3) applied by Pfitzer to those 

 Orchids in which the pseudobulbs 

 consist of a single swollen inter- 

 node ; the condition is Hetero- 

 blas'ty ; heterocar'pinus, an in- 

 ferior, or partially inferior fruit, 

 as the acorn ; Heterodichog'amy; 

 Engler and Prantl's synonym for 

 DICHOGAMY ; Heterodi'ode ( + 

 I'IODH;), a term to include MACRO- 

 DIODE and MICRODIODE (Van Tieg- 

 hem) ; Heterodisty'ly, dimorphism, 

 as in Primula elatior, Jacq. ; Heter- 

 otristy'ly, trimorphism, as in 

 Lythrnm Salicaria, Linn. ; Heter- 

 om'erals, Bessey's abbreviation for 

 the Heteromerae of Bentham and 

 Hooker, a series of Gamopetalae ; 

 Heteromorph/ism, the hetero- 

 morphic condition ; Heterome- 

 sog'amy (^euos, intermediate, 

 ydfj.os, marriage), when indivi- 

 duals vary in the method of 

 fertilization, as (a) auto-allogamous, 

 (b) homodichogamous, and (c) 

 dientomophilous ; heteroph'agous 

 (<j>dyu, I eat), applied to Fungi 

 which attack plants not congeneric 



310 



