heterochlamydeous 



heterogenetic 



corolla clearly differ ; heterocho'ric 

 (xopfoo, I spread abroad), used of 

 a species inhabiting two or more 

 closely related formations ; hetero- 

 chromat'ic, adj. of Heterhchko- 

 MATisM ; Heterochro'mati8m(xP'iii"a, 

 colour), a change in the colouring or 

 marking, of petals ; Heterochro'mo- 

 somes ( + Chromosomes), aberrant 

 chromosomes (< -ates) ; cf. Mono- 

 somes ; heterochro'mous, when the 

 florets of the disc in Compositae 

 differ in colour from those of the 

 ray ; heterccli'ronous (xp<^»'os, dura- 

 tion of time), in cultures when sow- 

 ings are made at different times 

 (Clet?ents) ; heterocis'mal, an ill- 

 contrived version of heteroecious ; 

 het'erocliue, heterocli'nous, -nws, 

 {kKIvi}, a bed), Avith the male and 

 female members on separate recep- 

 tacles. 



het'eroclite, heteroc'litus {erep6K\iTos, 

 varying in declension), anomalous 

 in formation. 



heterocot'ylous («T6poj, other ;-f Coty- 

 ledon), having cotyledons un- 

 equally developed ; heterocy'clic 

 {kvk\o^, a circle), used when tiie 

 floral whorls are heteromerous, not 

 uniform or isomerous ; Het'erocyst, 

 {kvo-tis, a bag), large inert cells 

 in the filaments of certain Algae, 

 separating contiguous hormogonia ; 

 adj. heterocyst'ous ; heterodes'mic 

 {SefffjLos, a bond), used when the 

 vascular bundles are partly of 

 phloem only ( I>rebner) ; cf. homo- 

 DESMic ; Heterodichog''ainy ; Engler 

 and Piantl's synonym for Dicho- 

 gamy ; Heterodi'ode ( -f Diode), 

 a term to include Mackodiode and 

 MiciioDiODE (Van Tieghetn) ; Het- 

 erodi'ody {Si6Sos, a passage), Van 

 Tieghem's term for the condition of 

 those Diodes which are differenti- 

 ated into Macrodiodes, and Micro- 

 diodes ; cf. IsoDiODY ; Hetero- 

 disty'ly ( + di ; stylus, a style), 

 dimorphism, the presence of two 

 kinds of plant, having either long 

 or short styles, e.g. Primvia ; adj. 

 heterodisty'lous ; heterod'romous. 



-vius, {Zp6/j.os, a course), having 

 spirals of chani;ing directions, a-t 

 in some tendrils, or phyllotaxis ; 

 Heterod'romy, when two spirals take 

 -different or opposite courses ; he- 

 terodynam'ic {Svuafiis, power), ap- 

 plied to pairs of characters, one 

 dominant, the other recessive ^Cor- 

 rens) ; heteroe'ciotis, forms which 

 pass through their stages of de- 

 velopment on diHerent ho.sts are 

 so termed ; metoecious is a syno- 

 nym ; Heteroe'cism, the condition 

 a heteroecious parajsite ; heteroecis'- 

 mal, should be heterokciois ; 

 Heteroe'cium {oJkos, a house), a 

 Fungus which passes its stages on 

 more than one host plant ; a 

 metoecious parasite ; Het'eroecyst 

 (Crozier) = Heterocyst ; Hetero- 

 eu'fonns {d, well ; -f- Form), forms 

 of Pitccinia, producing uredospores 

 and teleutospores on a host other 

 than that on which they biing 

 forth spermognnia and aecidia ; 

 Het'erofonns is a contraction for the 

 same ; heterog'amous, -mus, {yd/xos, 

 marriage), (1) bearing two kinds of 

 flowers, a.s in Compositae, the florets 

 of the ray may be neuter or uni- 

 sexual, 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 ; 

 heterogene (ycVos, offspring), the 

 character of offspring when the 

 parents are hybrids or belong to 

 aifferent types (Lotsy); heteroge'- 

 neouB (yfvos, race), not uniform in 

 kind; Heterogeneity, dissimilarity 

 of nature ; heterog'enous Induc'tion, 

 used by Noll to denote sensitive 

 movements in which two different 

 causes co-operate ; Heterogen'esis 

 {yeueais, beginning), (1) alternation 

 of generatiiins ; (2) tJie origin of 

 organisms from different genera or 

 orders, or de' novo (Ijastian); (3) 

 origin by sports, or bud variation; 

 heterogenet'ic, when applied to 

 fertilization me^ns cross-pollina- 



177 



