44 I- Karel Kavina: 



t a r i u s, in tlie genus Russula, Fistulina and in 

 lacticiferous species of My cen a (after the use of sulpho- 

 formol oř the . Arnould-Go ris reagent) it is always pos- 

 sible to demonstrate the direct connection of cystidia with 

 lacticiferons-cells (milk-vessels); in the rest of fungi the cys- 

 tidia are the mere-terminations of the excretory conductive 

 hyphae ; 3. the watering and lactescence of lamellae always 

 proceed f rom cystidia ; the author describes in detail lactes- 

 cence in Boletus granulát US, Bol. Boudieri QuéL, 

 Fistulina hepatica and Hypholoma lacrima- 

 bundům Fr. ; 4. species of Russula f rom the section 

 I n s i d i o s a e and I n g r a t a e always háve a greater num- 

 ber of cystidia than species with palatable flésh; 5. indivi- 

 duals growing in dry and warm situations always háve more 

 cystidia than those in damp and cold places ; Boletus 

 vari egatus ScJiw. from the ridges of the Krkonoš-moun- 

 tains (Giant-Mnts; 1300 m in alt.), displayed on the circum- 

 ference of the tubes 5 — 15 cystidia, whereas individuals from 

 the warm pine-woods along the Elbe usually háve 20—30. 

 Similar observations were made on Galéra tenera Schaef., 

 Boletus luridus scJiacf., 'Rusula f ragi 1 i s Per^., R. 

 d e 1 i c a Fr., R. p u e 1 1 a r i s Fr., Lactarius helvus Fr.^ 

 L. lignyotus Fr., Mycena lactescens Schr., R o z i t e s 

 caperata (Pers.) Karst. and Clitocybe laccata Scop. 



Analogical organs are the paraphyses of 

 L' i s co m y ce te s, in which it is also possible to ascertain 

 secretions. 



The biological significance of the secretion : in earliest 

 youth cystidia are reservě organs, containing especially gly- 

 cogen, but later they excrete the products of decomposition 

 foUoving intensive action during the formation of spores. 

 By secretion and later autodigestion is evolved heat, 

 which canses the origin of delicate air — currents, important 

 .for the dissemination of spores; this circumstance explains 

 FalcVs theory of the active movement of fungus-spores in 

 calm air and of the radio-sensitiveness of the hymenium. 

 Odorous matters play the samé role as in other plants^ 

 and it is necessary to investigate their import from čase tcj 

 čase; iu Hy m enogastrineae they occur in connectiqi^ 



