Sympodial sporangiophore with external proliferation
P. lateralis sporangia
P. nicotianae sporangia
P. nicotianae overview of sporangia 40x. Photo from Q-bank: www.q-bank.eu, Henk Brouwer (CBS-KNAW, Utrecht, The Netherlands)
P. arenaria disease symptoms on Banksia
Dead Banksia sp. in a Kwongan heathland on mineral sand near Eneabba, Western Australia recently killed by root and collar rot caused by Phytophthora arenaria
P. agathidicia oogonia
P. agathidicida oogonia with SEM (top) and light microscopy (bottom)
P. austrocedrae - Mal del ciprés, stages of decline
Colony morphology of P. austrocedrae at 16 C after four weeks on PDA
Comparative gametangial morphology of Phytophthora Clade 5 species
Comparative gametangial morphology of Phytophthora Clade 5 species, with SEM (top) and light microscopy (bottom). P. heveae has smooth walled oogonia with funnel-shaped, amphigynous antheridia. P. agathidicida has mildly stipulate oogonia with globose amphigynous antheridia. P.cocois has mildly bullate oogonia with reflexed amphigynous antheridia. P. castaneae has coarsely bullate oogonium with rugose protuberances and narrow amphigynous antheridia (Weir et al. 2015).
P. alni oogonium
Bullate oogonium of P. alni (German variant) with oospore and amphigynous antheridium.
P. cactorum bleeding canker
Bleeding canker on European beech (Fagus sylvatica)
P. pluvialis on Pinus radiata
A Pinus radiata needle showing black resinous bands or marks consistent with the presence of red needle cast disease.
P. alni subsp alni sporangium
Non-papillate, non caducous sporangium, photo used with permission from Q-bank
P. cinnamomi in Australia
Death of Xanthoria and other native vegetation, Victoria, Australia
P. kernoviae oogonium
Oogonium with amphigynous antheridia, photo from Q-bank, used with permission