Heliophobous 



Refers to organisms which grow best in the shade. Syn. 

 Sciophyllous, Shade plant. 



Heliotropic 



See Phototropic. 



Helminth 



A worm, usually parasitic. 



Helophyte 



One of Raunkiaer's Life- form classes, consisting of marsh 

 plants whose Perennating parts are in the soil under water, 

 e.g., arrow-head, cf. Geophyte, Hydrophyte. 



Helotism 



A term that has been used for the interaction of two 

 organisms such as an alga and fungus in a lichen. See Mutual- 

 ism, Parasitism, Symbiosis. 



Hematypic 



Refers to reef-building corals which contain zooxanthellae 

 and algal Symbionts. 



Hemerocology 



The ecology of land that is modified by man such as 

 gardens, parks, fields, cf. Culture community. 



Hemerophyte 



A plant introduced into an area by man. cf. Culture 

 community, Exotic, RuderaL 



Hemicryptophyte 



One of Raunkiaer's Life-form classes in which the buds 

 or Perennating parts of plants surviving unfavorable periods 

 are located at the soil surface, cf. Cryptophyte, Geophyte, 

 Chamaephyte. 



Hemiepiphyte 



A plant that is Epiphytic (q. v.) for only part of its life- 

 time. 



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