Encephalartos hildebrandtii

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Encephalartos hildebrandtii

Near Threatened  (IUCN 3.1)[1]
CITES Appendix I (CITES)[2]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnospermae
Division: Cycadophyta
Class: Cycadopsida
Order: Cycadales
Family: Zamiaceae
Genus: Encephalartos
Species:
E. hildebrandtii
Binomial name
Encephalartos hildebrandtii
A.Braun & C.D.Bouché

Encephalartos hildebrandtii is a species of cycad in the Zamiaceae family.[3] It is native to Kenya and Tanzania at elevations from sea level to 600 metres (2,000 ft).[4] The species is named for the German explorer Johann Maria Hildebrandt.[5]

Description

These cycad species reach about 6 meters in height with a 30 cm 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 200–300 cm long and composed of numerous lanceolate leaflets that are 20–26 cm 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, 20–50 cm 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, 28–60 cm long and 15–25 cm 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.[6]

Gallery

  • Cone
    Cone
  • Trunk
    Trunk
  • Leaves
    Leaves

References

  1. doi:10.2305/IUCN.UK.2010-3.RLTS.T41931A10603165.en
    . Retrieved 19 November 2021.
  2. ^ "Appendices | CITES". cites.org. Retrieved 2024-01-17.
  3. ^ "Encephalartos hildebrandtii A.Braun & C.D.Bouché". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved September 25, 2020.
  4. ^ "Encephalartos hildebrandtii in Tropicos".
  5. JSTOR 4118872
    .
  6. ISBN 0-88192-522-5
    .

External links


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