96 



(103) 



various plants aljove groiind ■ as w ell as in those tiader 

 groti^d, (rhizome, roots;., but, to be sure, not in the same 

 abundance in all families. The representatives of many a 

 group of the plant kingdom are directly characterized by 

 their "tendency" to abundant tylose formation such as the 

 Scitamineae, laurineae, Juglandaceae, Salic::.neae , Ur&icaeeae, 

 Moraceae, Artocarpaceae, Ulraaceae, Anacardiaceae , Yitacfeae, 

 Cucurbitaceae , and AristoXochiaceae, In other families, 

 only single genera have the capacity for forming tyloses 

 (for example, Eobina among the Papilionaceae) , ^_ still 

 others tyldse format ifin is very "rare or is entirely lacking. 

 (Ebenaceae, Aoerineae, Mimoseae, Rosaceae, 



I repeat here the list of plants bearing tyloses, as 

 given by Molish in a someiwhat more extended forma and^l^imit 

 myself therein to the statement of the generic names. ■*■ 



Abies (Raatz) 



Achyranth.es 



i^esculus, (Maule, Tison) 



Alnus (Tison) 



Ampelopsis 



Aralia' 



Aristolochia(cf, also Tison) 



Arto'carpus 



Arundo 



As arum 



Banisteria 



Begonia 



Be tula 



Bignonia 



Boehmeria 



Broussonetia 



Bryonia 



Ganna 



Carica 



Gary a 



Cassica 



CaS'-Sanea 



Oata3.pa 



Celtis 



Chilantus 



Cladrastis (Tison) 



Coccoloba 



Ooleus 



Convolvulus (Dutailly) 



Gornus (Maule) 



Corj^li^a Corypha 



Cucumis 



Cucurbita 



Guspidaria 



Dahlia 



Biospyros 



1. Besides the literature alt eady„city, compare also the 

 following works ;-,,Un^er, Ueb. Ausfullung alternder u, ver- 

 letzter Spiralge^ass.e durch Zellgew, Sitzungsb, Akad. ?/iss, 

 Wien, 1867, Bd. LVI, Abt. I, p. 751. Dutailly, Sur quelgu. 

 phenom. determ. par 1'' apprattion tardive d'elem. nouv. d. .. 

 tiges et 1. racines d. Dicot. These (BordeauxC , Paris 187^^. 

 Rus.soT,?, Z. Kenntn, d. Holzes. InSonderheit d.^Jioniferen- 

 holzes. Bot. Gbl. 1883, Bd. ZIII , p. 134, Prael, Vergle 

 Untersuch. ub. Schutz- u. Kerhnholz d. laubb, Pringsheim* s 

 Jahrb. f. Wiss, bot, 1888, Bd. ZIX, p. 1. (compare Ber, d. 

 .3). Bot. Ges., 1887, Bd. 7, p. 417). Williamson, On some 

 anomalous cells developed within the interior of the vascu- 

 lar and cellular tissues, etc. Ann. of Bot, 1888, Bd.I.p. 

 315. Conwentz, Ueber Th. u. thyllenahnl. Bildungen, vornehm- 

 lich imHolz d. Bern-Stbrnnlaume. Ber. d, D. Bot. Ges, 1889, 

 Bd. VII, p. 39). Tubeuf, Ueb. normale u. pathogene Kernbild- 

 ung d- Holzpfl. u. s. w. Zeitschr. ges. Forst. u. Jagdw. 1899 

 Bd. XXI, pi 385, Raatz. Uber .yhyllenbild, in d. Tracheiden 

 der Koniferenhol^er, BerjiQiite d. D. Bot. Ges. 1892, Bd. X, 

 p. 183 (compare ©ojiwentz, ibidf;Pi 218). Matile Der Faserver 

 lauf im WuhdJ^olz. Bibl. ;Bpt. 3,^95, Bd. XXXIII, p. 5,6.Anteil 

 d. sekund Holzes d. dikotyl 'Qewacihse an d. Saftleitang u.s.w. 

 Wielfer. Ueber d*- Anteil d. Pringsheim* s Jahrb.f .wiss.Bot, 

 1888, B4, XIX,p;82.Ueb.d. Vorkommen v.Verstopfungen in d Ge- 

 fassen'monojiot. 'u. dikpt. Pfl.Meded.Proefsta. Mid- Java, 18 92. 



