50.0 MB (2.8 MB compressed)
3621 x 4826 pixels
30.7 x 40.9 cm ⏐ 12.1 x 16.1 in (300dpi)
DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY
Emerging shoot of Podophyllum peltatum, the May Apple, a native of the Eastern United States, family Podophyllaceae. Podophyllum species are the source of podophyllotoxin, a cytotoxic substance extracted from the rhizomes ( roots ) which arrests cell division at metaphase. The extract is used as a topical treatment to remove Human Papilloma Virus induced genital warts, under the name Podocon-25 in the USA. The extract has teratogenic activity and its use by pregnant women is not recommended. The picture shows a plant growing in Norfolk UK in March. P. peltatum is a spreading rhizomatous perennial suitable for shady situations.
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