Encephalartos hildebrandtii is a species of cycad in the family Zamiaceae. It is native to Kenya and Tanzania at elevations from sea level to . The species is named for the German explorer Johann Maria Hildebrandt.
Description These cycad species reach about in height with a diameter stem that is erect and lacks branches. The stem is covered in linear cataphyll and thick yellowish hairs. The leaves are found at the top of the stem in a crown formation and are supported by a tomentose petiole that is 1–7 cm long. Each leaf is long and composed of numerous lanceolate leaflets that are long and 28–36 mm wide. The leaflets are arranged on the spine at angles of 45-80°, with the basal leaflets reduced to thorns.
This species is dioecious, meaning it has separate male and female specimens. Male specimens produce 1-7 cylindrical-fusiform cones that are green or yellow, long and 5–9 cm in diameter. These cones have large, rhombic-shaped microsporophylls. Female specimens produce 1 to 4 cylindrical cones that are yellow and larger, long and broad, with rhomboid macrosporophylls.
The seeds are oblong, measuring 28–60 mm long and 15–25 cm in diameter. They are covered by a yellow-to-red sarcotesta.
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