(jAilXE- 
Bvnwn Hot of Citrus. 
oli 
111 some c'as;*s tlia ratios jj'ivou in the Key may l)e subject to 
slight variatioJi whev(‘ tlie writer has not been able to obtain tho 
menu dimensions of the conidia, but only the range within which the 
majority occur. The ratios wlien not given l>y Kosenbaum Averr- 
>-nleulated from hgures in the references indicated. P. faberi is 
imdiided on tlie aiitliority of Aslihy (^). 
PHYTOPHTHORA HIBERNALIS n.sp. 
'Mvcelium irregularly branched, hyabne; hypliae at first coii- 
thuioiis, somewhat sejdate and often empty when old. 3 — 12mmm. in 
Avidth usually ■"minm.^ inter or intracellular; conidiojhiores simple 
bearing a single tmminal conidium ; conidia elli})tical papillate 17 — dd 
X 10 — 28mnmi.. deciduous with very ])ersistent pedicels 2 — oGminm. 
long, often germinating as zoos])orangia ; zoospores reniform, biciliate 
n X Ommin. germinating by germ tubes; oogonia hyaline, subglobose 
22--.'6mmm. in hmgtli, at first smootJi, but later forming a rough 
covering on the oos])ore: antheridia persistent, hyaline, ovoid, smooth, 
amphigynous, rarcdy ])aragyiious; oos])ores S{)herical, 22 — 45.6mmm. 
yellow to taAVJiy when mature. 
Hab. On fi'iiit, leaves and smaller brauclu‘s of citrus sp]'. 
AVesterii Australia. Smith Australia, and probably Victoria. Queens- 
laml and the Arcditeri-aiU'an Ih'gion. 
Myi-elio rai>!o><o ii-regulariter, liyalino. ex hyjihis prime con- 
tinuis tandem s<‘j)tatis, 3 — 12inmm. ])leruni(jue ommm. crassis, inti'r et 
iiitra-cellularibiis ; cmiidiojihoris iiiiicis et sustinentibus conidium 
unum in a[iice; conidiis ellijisoidalis, papillatis. 17 — 36 x 10 — 28nimni. 
<leciduis, cum pedicellis ]>ersistentibus, sa.e])e forinatibus zoos])orangia ; 
zoosporis lamifoi'mis biciliatis’ 1 1 x 9mmm. ; oog’onis subglobosis. 
hya.Iinis, 22 — oOmmm., lougis. levibus sed \mstutioribus rugosis; anth- 
er id iis ])m'sistenti)ms, hyalinis, ovoid eis, levibus. aniphigynis raro 
paragynis; oosporis sjihaericls hyalinis ATstutiorilius luteis, 22- — 
43 . (bninni . 
Hab. in fructibus, foliis, rainis (htri s])p. 
Ill Western Australia. Soutli Australia et probabilitm- Victoria, 
(Ltueensland (>t Regionis Alediterranae. 
PROBABLE LIFE HISTORY IN WESTERN AUSTRALIA. 
hioni field and laboratory eAudence tlie folloAving life historv 
ap]ieai.s probable. The fungus liA'es o\’er the summer in the oosjiore 
stage. With the mext winter rains (May or dune) the oosjmres 
geiminate, tlie fungus groAvs to the ground surface and forms coni 
dia. These are lilown or sjilaslied on to the lower parts of citrus 
trees by the driving Avinds, Avhich so freipiently accompany rain in 
this State, or they may come in contact Avitli leaves or fruits touch- 
