The Hydrangea seemannii species belongs to the Cornidia section of the Hydrangea genus and is native to the Sierra Madre Occidental, Mexico (an area within the Neotropics), at altitudes of 1800-2200m. Most, if not all, species belonging to the section Cornidia, are dioecious (having male and female reproductive structures on separate plants).
Inflorescence: Irregular, up to 180mm across, with white fertile flowers and white asymmetrical sterile florets. Slightly scented.
Previously known as H. peruviana, H. weberbaueri, H. trianae, H. schlimii, H. platyphylla, H. panamensis, H. oerstedii, H. lehmannii, H. goudotii, H. durifolia, H. caucana.
Native to Mexico. Introduced by Neil Treseder circa 1985.
Zones: 8 to 9
Size: Indeterminate climber.
Color in neutral soil:
Color in acidic soil with AI present:
White (no change)
Ray florets: 4 sepals, irregular shapes and sizes, entire, overlapping, 30mm diam.
Leaves: Evergreen, 50-200mm long x 30-80mm wide, on long petioles. Glabrous above, slightly pubescent below.