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llliciospermum
Genus llliciospermum Frumin, Friis Pl. Syst. Evol., 216(3-4): 279. Sep 1999
- Name
- llliciospermum
- Rank
- Genus
- Authors (Pub.)
- Frumin S.
Friis E. M.
- Publication
- Magnoliid reproductive organs from the Cenomanian-Turonian of north-western Kazakhstan: Magnoliaceae and Illiciaceae [1999/9]
- Journal
- Plant Systematics and Evolution
- Volume
- 216
- Issue
- 3-4
- Page number
- 279
- Year
- 1999
- Parent Taxon
- [Order] Illiciales
- Fossil Status
- seeds
- Type
- llliciospermum pusillum
- Diagnosis
- Seeds small, anatropous, bitegmic and exotestal,
ellipsoid to spherical, bilaterally symmetrical with the plane of symmetry running
through the raphe, sometimes slightly laterally compressed. Raphe indistinct
externally. Hilum distinct forming a depression at the apex of the seed. Micropyle
formed by the inner integument, marked on outer integument by a transverse slit
adjacent to the hilum. Testa formed from an outer layer of palisade-shaped
sclereids and an inner layer of thin-walled parenchyma cells. Palisade cells large,
irregularly arranged; facets with strongly undulate anticlinal walls except at the
apical conical structure where they are aequiaxial and rectangular-polygonal with
straight walls. Parenchyma layer of testa several cells deep. Tegmen thin, crushed.
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