21. Plants have vascular tissue, albeit significantly simpler than modern vascular plants . 22. The flora was traditionally estimated to comprise about 5, 500 vascular plant species. 23. The only endemic vascular plants in Finland are microspecies of dandelions and hawkweeds. 24. The park also boasts one of the world s richest levels of vascular plants . 25. It is a vascular plant in the monocotyledon subclass Commelinidae. 26. There are about 1, 013 species of plants known, with 822 vascular plant species. 27. Generally host plants must be vascular plants , but not always. 28. The Saharan flora comprises around 2800 species of vascular plants . 29. During the Devonian period, vascular plants diversified and spread to many different land environments. 30. Currently there are around 5, 000 species of vascular plants in the botanical garden.
