Xanthophyll 



yearly 



etiolated plant (Van Tieghem) ; 

 Xan'thophyll (<j>v\\ov, a leaf), a 

 constituent of chlorophyll, a yellow 

 colouring matter insoluble in water ; 

 Xanthophyl'lidrine, a yellow crys- 

 tallizable pigment, like the last, but 

 soluble in water ; Xanthopi'crine 

 (TR/CJOOJ, bitter), a yellow bitter 

 principle from the bark of Zan- 

 thoxylon caribbaeum, Lam. ; Xan- 

 thorham'nin, the yellow colouring 

 matter of the ripe fruits of Rham- 

 nus ; Xanthotra'metin ( + TRAMA), 

 a colour resin in Fungi, as Poly- 

 porus cinnabarinus, Fr. 



Xen'ia (lectos, belonging to a guest), 

 Focke's term for the direct influ- 

 ence of foreign pollen on the parts 

 of the mother-plant (Stift). 



Xenocar'py (f^os, a stranger, xap-jros, 

 fruit), producing fruit as the result 

 of xenogamy ; Xenochro'ma (xpuna, 

 colour), Focke's term for the effect 

 of foreign pollen producing a change 

 in the colour of the fruit ; Xenog'- 

 amy (yd/mos, marriage), cross-fer- 

 tilization between sexual elements 

 borne by different individuals 

 (Loew) ; cf. GEITONOGAMY ; Xeno- 

 plas'ma (ir\dff/ma, moulded), em- 

 ployed by Focke to denote change 

 in shape of fruit produced by the 

 action of foreign pollen. 



xerampel'inus (Lat.), the dull red or 

 purple of dead vine leaves. 



xerochas'tic (frpos, dry, x aff t JL <*u, I 

 gape), applied by Aseherson to 

 plants whose fruits burst by 

 desiccation and their seeds or 

 spores are scattered ; Xe'rophile 

 (<pi\eu, I love), a plant which 

 grows in a dry situation ; xero- 

 ph'ilous, growing in arid places ; 

 Xe'rophyte ((pvrov, a plant), a plant 

 which can subsist with a small 

 amount of moisture, as a desert 

 plant ; adj. xerophyt'ic ; Xerot'- 

 ropism (rpoir^, a turning), the 

 tendency of plants or parts thereof 

 to alter their position to protect 

 themselves from desiccation (Borzi); 

 adj. xerotrop'ic. 



xiph'iold (0os, a sword, eTSoy, re- 



semblance), sword-like, ensiform ; 

 xiphophyl'lous, -lus (<pv\\ov, a leaf), 

 with ensiform leaves, as Iris. 

 Xy'lan (^uXov, wood), the chief con- 

 stituent of WooD-GuM ; Xy'lem, 

 the wood-elements of a vascular 

 bundle, possessing tracheal tis- 

 sue ; ~ Bridges, connections 

 surrounding phloem - islands ; ~ 

 I'slands, detached strands of xylem 

 in certain species of Thunbergia 

 (Roulet) ; ~ Parench'yma, oblong 

 cells which retain their proto- 

 plasm, with thick and lignified 

 walls, occurring in longitudinal 

 bands ; ~ Plate, ~ Ray, a radial 

 plate of xylem between two medul- 

 lary rays ; cf. PHLOEM RAY ; xyl'i- 

 nus, woody, pertaining to wood ; 

 xylocar'pous, -pus (Kapiros, fruit), 

 the fruit becoming hard and 

 woody ; Xyl'ochrome (xpufta, 

 colour), (1) wood - dyes, chiefly 

 tannins ; (2) the dark coloured 

 contents of the vessels of the 

 duramen (Hartig) ; Xylo'dia, Xylo'- 

 dium (elSos, like), (1) the woody 

 fruit of Anacardium ; cf. XYLO- 

 PODIUM ; (2) an old name for 

 ACHENE ; Xyl'ogen (yevos, off- 

 spring), used by Sachs for wood- 

 substance ; Xylo'ma, a sclerotioid 

 body which does not produce 

 branched sporophores, but sporo- 

 genous structures within itself ; 

 Xylomy'ces (/AU/CT/S, a mushroom), 

 a Fungus which grows on wood 

 or bark ; Xylonite, cellulose manu- 

 factured in plastic masses ; xylo- 

 ph/ilous (0i'Xew, I love), applied to 

 Fungi which attack woody tissue ; 

 Xylopod'ium (TTOUS, TroSos, a foot), a 

 fruit like a nucule, but wanting a 

 cupule, and borne upon a fleshy 

 support, as in Anacardium; Xy'- 

 lose, a pentose occurring in wood ; 

 Xylostro'ma, the leathery felted 

 mycelium of certain Fungi which 

 destroy timber ; Xylot'omy (TO/XOS, 

 a cut), the anatomy of wood, and 

 woody tissues; adj. xylotom'ic. 



yearly, annual, of a year's growth. 



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