Trichoblast 



(SUPPLEMENT) 



Versifonn 



I 



succession of plants on eroded soils 

 (Clements). 



Trich'oblast, (2) employed by Leavitt 

 for specialised cells which give rise 

 to root- hairs. 



Trimonoo'cism( + MONOECISM), having 

 male, female, and perfect flowers 

 on the same plant. 



Triple Fu'sion, a suggested emenda- 

 tion of the term DOUBLE FERTILI- 

 ZATION ; tripo'lar ( + POLAR), having 

 three poles. 



tris'tis, (2) flowering only at night 

 (Heinig). 



Tropn'ime, the result of the fusion of 

 the central nucleus of the embryo- 

 sac, the mesocyst, with the second 

 anth rozoid (Van Tieghem) ; tro- 

 phoplas'mic (TrXaV/ia, moulded), 

 adj. of TROPHOPLASM ; Troph'osome 

 (o-w/ta, a body), any organ which is 

 concerned with supplying nourish- 

 ment only; Troph'ospore ( + SPORE), 

 applied to the spores of Diatoms, 

 De^mids, Bulbochaete and Coleo- 

 chaete (Radlkofer) ; Trophospor'o- 

 some, applied to organs which are 

 engaged in nourishing and also in 

 reproducing the plant (Potonie"). 



Trop'ism, the disposition to respond 

 by turning or bending (Copeland). 



tropoph'ilous, the functions of TROPO- 

 PHYTES. 



Trop'ophyll (<j>t\\ov, a leaf), leaves of 

 shrubs and trees (Potonig). 



Trop'opnyte (QVTOV, a plant), a plant 

 which is in turn a Hygrophyte and 

 a Xerophyte (Schimper). 



trul'lifer, trullifor'mls (Lat.), shaped 

 like a bricklayer's trowel. 



trypt'ic, relating to TRYPSIN, or 

 similar enzyme. 



Tube-cell, the cell which gives rise to 

 the Pollen-tube. 



Tuberculization, the formation of 

 tubers, assumed to be due to the 

 attack of a Fungus (Bernard). 



Tu'nic, (5) employed by Smith for 

 UTRICLE of Car ex}. 



Twin-bundle, the double leaf -trace of 

 Lyginodendron. 



tycholimnet'ic (+ LIMNETIC), tycho- 

 pelag'ic ( + PELAGIC), plankton 



occurring accidentally in oceanic 

 regions (Forel). 



tymp'anoid, Berkeley's term for 

 "resembling the head of a drum." 



Typhe'tum, a plant association of 

 Typha. 



Ty'piform (typus, a type, +FOEM), 

 a constant form, arising either by 

 natural selection or by animal 

 adaptations ; its existence is fre- 

 quently dependent on animals 

 (Kuntze). 



Ulto'nian (Ultonia, Ulster), relating 

 to the province of Ulster ( Praeger). 



uncortica'ted (corticatus, covered 

 with bark), destitute or deprived 

 of cortex. 



uninu 'clear, uninu' cleat ed (+ NU- 

 CLEAR), having no more than one 

 nucleus ; unipolar ( + POLAR), 

 with only one pole ; uniteg'minous 

 (tegmen, a covering), having one 

 coat to the ovule. 



urea'ceua (Mod. Lat.), of a charred 

 black colour (Hayne). 



Uredinol'ogist (\6yos, discourse), one 

 skilled in the knowledge of para- 

 sitic Fungi, Uredo and its allies ; 

 Ure'doform (forma, shape), re- 

 sembling Uredo in appearance ; 

 Uredosorus ( + SORUS), a group of 

 uredospores. 



uredospor'ic (+ SPORA), bearing 

 UREDOSPORES. 



u'rophile (o&pov, urine, 0iXew, I love), 

 expressive of Algae growing on 

 soil containing much ammonia 

 (Chodat). 



Vac'uoles, see PROTEID-VACUOLES. 



valve-view, the Diatom frustule seen 

 from the side, the girdle being 

 then marginal. 



Vegetative Division, heterotypic 

 nuclear division. 



verbena'ceous, allied to or re- 

 sembling Verbena. 



Vermiform (versus, turned towards), 

 a form which varies from the 

 STEM-FORM in several particulars 

 (Kuntze). 



360 



