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Saportanthus
Genus Saportanthus Friis, P.R. Crane, K.R. Pedersen Int. J. Pl. Sci., 178(8): 651. 18 Aug 2017
- Name
- Saportanthus
- Rank
- Genus
- Authors (Pub.)
- Friis E. M.
Crane P. R.
Pedersen K. R.
- Publication
- Saportanthus, an extinct genus of Laurales from the Early Cretaceous of Portugal [2017/8]
- Journal
- International Journal of Plant Sciences
- Volume
- 178
- Issue
- 8
- Page number
- 651
- Year
- 2017
- Parent Taxon
- [Order] Laurales
- Fossil Status
- flowers
- Type
- Saportanthus dolichostemon
- Diagnosis
- Flower small, actinomorphic, structurally
bisexual with a semi-inferior ovary. Phyllotaxis of tepals
and stamens apparently spiral. Perianth with six to eight tepals,
tepal bases broad. Androecium of five to 15 stamens with almost
sessile, basifixed anthers. Anthers dithecate and tetrasporangiate;
thecae separated by a broad connective; dehiscence
latrorse to extrorse by four laterally hinged valves that extend
for the full length of the anther. Pollen circular in polar view;
trichotomocolpate or dicolpate; pollen wall thin, tectate with
thin granular infratectal layer. Tectum ornamentation finely
striate proximally with delicate ridges forming a fingerprint-like
pattern; psilate-punctate distally around the aperture(s). Gynoecium
syncarpous, of one to three carpels; ovary with one
to three locules. One ovule per carpel, apical and pendulous;
ovules anatropous, small, not filling the ovary cavity. Inner lining
of ovary wall (endocarp) with several layers of narrow, longitudinally
aligned sclerenchyma cells. Stylar area conical with
two or three short styles. Fruit indehiscent, drupaceous; seeds
one to three; seed coat thin with a finely reticulate surface.
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