XtTKK I Ml. 



have been named mycorhixa l or fungus-root>. Where, 

 new structures (swellings. etc.) are produced mi the roots. a- ;i 

 re>ult of symbiosis with fungi or bacteria. the name mycodomatia 

 nr fungus-chambers has been applied. 



< 'lie division of mycorhixa consists of tlmsi- which live in 

 humus, and act as intermediaries in supplying their hoMs with 

 nutritive material. In this fast- the fungus covers the hot- 

 root like an outer covering, forces itself between the cell- of 

 the outer layers, and produces haiistorial hranches in the interior 

 of the host-cells. These Frank designates as ectotiophic 

 mycurhixa. The remaining myeorhixa do not t'oini such an 

 external sheath, hut live inside the I'tin-us-trajis. and produce 

 tan-led coils of hypliae in the root-cells of the host. Tin-,- 

 Frank di.stingui.-he> as endotrophic myeorhixa. 



Ectotrophic Mycorhiza. 



(1) On non-chlorophyllous plants living on humus. 

 Kaminski- \va> the fir.-t to observe that Mn<iti-<n>n litf/mj, ,///*. a 



non-chlon.phyllous ]ilant living rooted in forest-mould, possessed a 

 compact rout system devoid of root-hairs, hut covered with the 

 hypliae of a fungus. At the same time, he expressed the belief 

 that a symhiotic relationship existed hetwcen the fungu> and 

 tin- roots of Mn,it,-<>i><i, \vheiviiy the former supplied nutriment t 

 the latter. The fungus clothes the grouing point, and e\lend- 

 hackwards to that part of the rout which ha> ceased to elongate; 



lliele the mycelium penetrates :; inwards hetNVcen the root-eell>. 



and remains intercellular. The myeorhixa of J/M//.///-,,//^ thu> 

 shoued euinplete agreement \\ith iho>e known earlier on tin- 

 rout- of < 'iipuliferac, 1 and since proved by Frank to have a \ri\ 

 geneial distribution. .lohow-' 1 ha> pointed out that an external 

 mantle of fungi also exists round the rout -apices of //>/(,.//,/_//.> 

 hypophaegea, a holosaprophytic plant de\oid of chlorophyll 



l Sarauw, A'II//.-////(/I/'-' </ M i/i-'.i-rln . / >" /// lx>* Sk&vtraeme, l^li.'! \\iih 



iiii.^ki, M> in. ii in toe. <! - sciences until,-, il, i 'h, //, /./. 'I'. _'. ISNJ 

 I ' mk, /:!"/<> it. <l> n/-"-/t iinfiiii. '.. . is^.'i. 

 1 Mnlli-i , Studi> r '- i' S/.-i>'yi>iit -"/n lii'lni-i ii! Skovdrykninyens /'A.../-/, |s7^ 



,lnli<i\\ . ' I lii- i lili.l njilis lid I'ji-H II IMIIII>)ill.lll/i'li." /';/'/// s/|. /'///'- J ] 



