Phytophthora tubulina (CBS 141212 — ex-type), structures formed in solid V8 agar. A–H. Mature oogonia with paragynous antheridia, formed in single culture. A. Subglobose with tapering base and aplerotic, globose thick-walled oospore. B–C. Elongated ellipsoid with tapering bases and aplerotic, globose thick-walled oospores. D. Elongated pyriform with tapering base and aplerotic, globose thick-walled oospore. E. Elongated tubular with tapering base and plerotic, elongated tubular, thick-walled oospore. F–G. Elongated excentric with almost plerotic elongated oospores containing two ooplasts. H. Elongated tubular containing a globose, viable thin-walled oospore. I. Elongated tubular containing a subglobose, viable thin-walled oospore and a second, ellipsoid aborted oospore (arrow). J–L. Oogonia aborted after oospore formation. J. Elongated tubular. K. Elongated pyriform. L. Excentric. M–Q. Extremely elongated, tubular oogonia, aborted before oospore formation, with paragynous antheridia (arrows). R–S. Primary hyphae branching in a dichasium (R) or monochasium (S) with the mother hypha ending in a short protruding tip. Bar A–S = 25 µm.