Onychium 



( 136 ) 



Oospore 



Other Cultural Points. Japonicum is semi- 

 deciduous, and should be kept rather dry during 

 winter. Auratum is evergreen. Snowy fly is the 

 most . troublesome insect pest ; remedy, sponging 

 with soapy water. 



OOSPORA ABIETINUM. 



This is the fungus which attacks several species 

 of Abies so severely as to cause wholesale prema- 

 ture dropping of the leaves. Nordmanniana and 

 Pinsapo are the greatest sufferers. The parts of 



Ptioto: C 



Principal Species : 

 auratum, fronds 12" long, 



8" to 9" broad, quadri- 



pinnatifid, st. ev. 

 japonicum .fronds 1 2"Iong, 



Other Species : 



capense of gardens (see 



japonicum). 

 lucidum of gardens ( 



japonicum). 

 melanolepis, fronds 3" to 



ONONIS FRUTICOSA (seep. 135). 



6" _ broad, quadripin- 

 natifid, semi-deciduous 

 ("ifiix. capense and lucid- 

 um). There is a var. 

 multisectum. 



4" high, 2" broad, 

 quadripinnatifid, grh. 

 strictum, frouds (>" to 9" 

 long, 3" to 4" broad, 

 quadripinuatifid, st. 



the fungus are exceedingly small, and it is difficult 

 to deal with it. The collection and burning of the 

 fallen leaves are, however, helpful. 



OOSPORE. 



Literally an egg spore. Oospore is the technical 

 name given by botanists and zoologists to the 

 spore, formed by the fertilisation of the oosphere 

 by the male element. Thus the oosphere may be 

 described as the incipient egg before fertilisation, 

 it being an oospore after fertilisation. The 

 oospore, or resting spore, is of considerable interest 



