Mirabilis jalapa in Field (image) University of Oxford Caption This is Mirabilis jalapa (the four o'clock flower). This plant is the host of Phytophthora mirabilis, the sister species of the Irish potato famine pathogen Phytophthora infestans. Credit Sophien Kamoun, The Sainsbury Laboratory (Norwich, UK) Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.