Heteroecium 



Heterostylism 



oecious parasite ; Heteroe'cium 

 (el/cos, a house), a Fungus which 

 passes its stages on more than one 

 host plant ; a metoecious parasite ; 

 heteroecis'mal, should be HETER- 

 OECIOUS ; Het'eroecyst (Crozier), = 

 HETEROCYST; heterog'amous, -mus 

 (yd/uos, marriage), (1) bearing two 

 kinds of flowers, as in Compositae, 

 the florets of the ray may be neuter 

 or unisexual, and those of the disk 

 hermaphrodite ; (2) an abnormal 

 arrangement of the sexual organs 

 (Masters) ; Heterog'amy, change of 

 the function of male and female 

 flowers, or in their arrangement ; 

 heteroge'neous (7^05, race), not 

 uniform in kind; Heterogeneity, 

 dissimilarity of nature; heterog'en- 

 ous Induction, used by Noll to de- 

 note sensitive movements in which 

 two different causes co-operate ; 

 Heterogen'esis (76/60-1$, beginning), 

 alternation of generations ; hetero- 

 genetlc, when applied to fertiliza- 

 tion means cross - pollination ; 

 Het' erogone (70^17, offspring), a plant 

 whose flowers are dimorphic or tri- 

 morphic in the length of the stamens 

 or styles ; adj. heterog'onous, hetero- 

 go'neus ; Heterog'ony, the same as 

 HETEROSTYLY, cf. HOMOGONY ; 

 heteroi'cous, a form preferred 

 by some bryologists to the 

 usual spelling HETEROECIOUS ; 

 heteroi'deus (eftos, like), di- 

 versified in form (Lindley) ; het- 

 eromal'lous, -lus (^taXX6s, a fleece or 

 tuft of wool) spreading in all direc- 

 tions ; heterom'alous (Crozier), = the 

 foregoing ; Heteromer'icarpy (/ie/oos, 

 a part, Kapiros, fruit), Huth's term 

 for a binary fruit, the halves of 

 which differ from each other, as 

 Turgenia heterocarpa, DC. ; hetero- 

 merlcus, stratified, as in some 

 Lichens ; heterom'erous (1) when 

 the number of the members is not 

 uniform ; (2) in Lichens, the oppo- 

 site of isomerous ; heteromor'phic, 

 heteromor'phous (pop^y, form), (1) 

 variation from normal structure, as 

 deformities, etc.; (2) having organs 



differing in length, dimorphic, with 

 long and short styles ; trimorphic, 

 with long, short, and medium 

 length, the male organs (stamens) 

 being of corresponding length ; 

 heterone'meus (vrjfj-a, a thread), ap- 

 plied to plants which on germina- 

 tion produce thread-like bodies, 

 which afterwards unite, such as 

 Bryophytes and Pteridophytes ; 

 heterophyad'ic, heterophyad'icus 

 (0u?7, growth), used of those species 

 which have fertile stems of different 

 form from the barren stems, as in 

 some Equiseta ; heterophyllous 

 (<f>ij\\ov, a leaf), having leaves of 

 different forms ; Heterophylly, 

 used by Krasser, for two different 

 forms of leaves, when caused by 

 difference in organization ; Het'ero- 

 phyte, Heterophy'tus (<f>vrov, a 

 plant), ( 1 ) Trattinik's name for those 

 plants which bear leaves and flowers 

 on separate stems, as Curcuma 

 Zedoaria, Rose. ; (2) Boulger's term 

 for parasites destitute of chloro- 

 phyll ; adj. heterophy'tous ; hetero- 

 po'lar (ir6\os, a pivot), for the axis of 

 Diatomaceae when the extremities 

 differ; Heteropro'thally (+ PRO- 

 THALLUS), Van Tieghem's term for 

 the production of unisexual pro- 

 thallia ; heterorhi'zal (plfa, a root), 

 having roots or similar organs pro- 

 ceeding from any indeterminate 

 portion of a spore in germination, 

 or rooting from no fixed point ; 

 Heterosper'my (crTrep/xa, seed), bear- 

 ing two kinds of seeds, as in Suaeda, 

 some species producing both seeds 

 with endosperm, and other seeds 

 destitute of it; heteros'porous 

 (o-TTopct, seed), with spores of two 

 kinds, as in Selaginella ; Heteros'- 

 pory, the condition of producing 

 microspores and macrospores, etc. ; 

 het'erostyled, heterostylous ( + 

 STYLUS) = HETEROGAMOUS ; Hetero- 

 stylla, heterogamous plants ; Hetero- 

 stylism, having flowers differing 

 in the styles, as Compositae when 

 certain florets are unisexual and 

 others hermaphrodite in the same 



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