31 



ed before t}ie first crop falls off, go tha.t there appear to 

 be "t\.o sets of hair-like organs" (FARLOV/, '79, p. 132). 

 Bi'- the time the second f;ot is foriiied, the first set is car- 

 ried uy the grov/J?h of t}ie vegetative cell to some distance 

 from the cross paa^tition bet\/een the vegetative colls, and 

 the sfecond set of hairs is alv/a.j'-s formed bet..een the cross 

 pBj'tition and the first set (figs. 45, 46). 



Individuals vary greatlj'- in the nuxiber of hairs pro- 

 d^^ced. In some specimens, hairs a.re found on almost every 

 node in the younger portion of the plant. Again, one may 

 look over a great ma.nj'- shoots before encountering e. single 

 set of hairs. V/hat e:<:ternal conditions ejre favorable to 

 the production of hairs in Griff ithsia is not known. 



In the m£.terial examined by litESS SIvHTH ('96), hairs 

 occurred on the fem^ile plant only on nodes bearing cysto- 

 carps. Such a restricted distribution is not general,. 

 Any of the young vegetative cells seems to be capable of 

 producing liairs, and v;hile hairs occur usually in tlie vi- 

 cinity of reproductive oi-gans, there seems to be no neces- 

 sary connection between the t ,o. 



The function of the hairs is quite unknovm. They un- 

 doubtedly ij>crease,.^^_^^ tlie si'rface exposed to the v/a- 

 ter, and inasmuch as tliey occur especially abundantly in 



