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Phyrtandrus
Genus Phyrtandrus K.L. Chambers, Poinar J. Bot. Res. Inst. Texas, 10(2): 450. 14 Dec 2016
- Name
- Phyrtandrus
- Rank
- Genus
- Authors (Pub.)
- Chambers K. L.
Poinar G. O.
- Publication
- Phyrtandrus pentalepidus gen. et sp. nov., a unique fossil flower of unknown affinity found in mid-tertiary Dominican amber [2016/12]
- Journal
- Journal of the Botanical Research Institute of Texas
- Volume
- 10
- Issue
- 2
- Page number
- 450
- Year
- 2016
- Parent Taxon
- [Class] Magnoliopsida
- Fossil Status
- flowers
- Type
- Phyrtandrus pentalepidus
- Diagnosis
- Flower staminate, subtended by a whorl of 5 oblong-clavate bracts opposite the tepals. Tepals 5 in a
single whorl, ± alike, separate, sepaloid in texture, broadly oblong-ovate, strongly folded adaxially.
Outer whorl of stamens 5, fertile, laterally spreading, alternating with tepals, anthers basifixed, dithecal, with
latrorse, longitudinal dehiscence. Second anthoecial whorl of 2 well-developed staminodes and 1 oblong,
rudimentary staminode, each opposite 1 of the tepals, anther of 1 large staminode bearing a tangled
mass of trichomes, anther of other large staminode a spherical ball of grooved papillae (not illustrated),
inner anthoecial whorl comprising 2 long-exserted fertile stamens opposite the remaining 2 tepals and
1 oblong, rudimentary staminode alternating with 2 tepals. Gynoecium lacking. Pedicel slender, elongated. Pollen monosulcate.
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