| Flowering plants
The flowering plants (angiosperms), also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by a series of synapomorphies (derived characteristics). These characteristics include flowers, endosperm within the seeds, and the production of fruits that contain the seeds.
The ancestors of flowering plants diverged from gymnosperms around 245–202 million years ago, and the first flowering plants known to exist are from 140 million years ago. They diversified enormously during the Lower Cretaceous and became widespread around 100 million years ago, but replaced conifers as the dominant trees only around 60–100 million years ago.
Source: http://en.wikipedia.org/wiki/Flowering_plant
Ulmus pyramidalis | Bůžek (1971), Pl. 19, fig. 13 | | | ČB411 | Ulmus pyramidalis | Bůžek (1971), Pl. 20, fig. 9 | | | ČB477 | Ulmus pyramidalis | Bůžek (1971), Pl. 19, fig. 11, 12 | | | ČB60 | Ulmus pyramidalis | Bůžek (1971), Pl. 19, fig. 4 | | | ČB396 | Ulmus pyramidalis | Bůžek (1971), Pl. 19, fig. 8 | | | ČB473 | Ulmus pyramidalis | Bůžek (1971), Pl. 21, fig. 5 | | | ČB475 | Ulmus pyramidalis | Bůžek (1971), Pl. 21, fig. 3 | | | ČB357 | Ulmus pyramidalis | Bůžek (1971), Pl. 20, fig. 2 | | | ČB363 | Ulmus pyramidalis | Bůžek (1971), Pl. 21, fig. 7 | | | ČB367 | Ulmus pyramidalis | Bůžek (1971), Pl. 19, fig. 14 | | | ČB395 | Ulmus pyramidalis | Bůžek (1971), Pl. 20, fig. 10 | | | ČB405 | Ulmus pyramidalis | Bůžek (1971), Pl. 19, fig. 10 | | | ČB407 | Ulmus pyramidalis | AD Bůžek (1971) | | | ČB408 | Ulmus pyramidalis | Bůžek (1971), Pl. 19, fig. 16 | | | ČB478 | Ulmus pyramidalis | Bůžek (1971), Pl. 21, fig. 1 | | | ČB479 | Ulmus pyramidalis | Bůžek (1971), Pl. 20, fig. 7 | | | ČB413 | Ulmus pyramidalis | AD Bůžek (1971) | | | ČB417 | Ulmus pyramidalis | AD Bůžek (1971) | | | ČB419 | Ulmus pyramidalis | Bůžek (1971), Pl. 20, fig. 5 | | | ČB358 | Ulmus pyramidalis | AD Bůžek (1971) | | | ČB359 |
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