Heteroecium 
Heterostylism 
cecious parasite; Heteroe’cium 
(olkos, 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), = 
Herterocyst ; heterog’amous, -mus 
(yduos, 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 (yévos, race), not 
uniform in kind; Heterogene’ity, 
dissimilarity of nature; heterog’en- 
ous Induc’tion, used by Noll to de- 
note sensitive movements in which 
two different causes co-operate ; 
Heterogen’esis (yéveois, beginning), 
alternation of generations ; hetero- 
genet’ic, when applied to fertiliza- 
tion means cross - pollination ; 
Het’erogone (yov7), 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 
Hererostyty, ¢f. Homogony ; 
heteroi’cous, a form preferred 
by some bryologists to the 
usual spelling HETEROECIOUS ; 
heteroi’deus + (efdos, like), di- 
versified in form (Lindley); het- 
eromal'lous, -/us (uaddds, a fleece or 
tuft of wool) spreading in all direc- 
tions ; heterom’alous(Crozier), =the 
foregoing ; Heteromer‘icarpy (uépos, 
a part, capros, fruit), Huth’s term 
for a binary fruit, the halves of 
which differ from each other, as 
Turgenia heterocarpa, DC.; hetero- 
mericus, 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 (op¢7, form), (1) 
variation from normal structure, as 
deformities, etc.; (2) having organs 
122 
differing in length, dimorphic, with 
aed and short styles ; trimorphic, 
with long, short, and medium 
length, the male organs (stamens) 
being of corresponding length ; 
heterone’meus (yfjua, 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 
(pun, growth), used of those species 
which have fertile stems of different 
form from the barren stems, as in 
some Hquiseta; heterophyl’lous 
(pvArov, a leaf), having leaves of 
different forms; Heterophyl'ly, 
used by Krasser, for two different 
forms of leaves, when caused by 
difference in organization ; Het’ero- 
phyte, Heterophy'tus (gvrov, 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 (7é)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 (fifa, 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 (c7épua, 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 
(oropd, seed), with spores of two 
kinds, as in Sedaginella ; Heteros’- 
pory, the condition of producing 
microspores and macrospores, etc. ; 
het’erostyled, heterosty’lous (+ 
Sry1.Us) = HETEROGAMOUS ; Hetero- 
styl’ia, heterogamous plants ; Hetero- 
sty’lism, having flowers differing 
in the styles, as Compositae when 
certain florets are unisexual and 
others hermaphrodite in the same 
