Water lilies have stomata that are open most of the time, because
water is in great capacity so there is no need for it to be retained in the
plant. In result guard cells on the plant are genrally inactive. They also have an increased
number of stomata. They have flat leafs and air sacs to
help with flotation. The have specialized roots to take in oxygen
Acorus Calamus
the vivid white and green banded, deer-resistant leaves of Acorus calamus 'Variegatus' make this one of the most strikingly beautiful vertical accent plants in the garden! Variegated sweet flag spreads slowly by means of a very thick above-ground rhizome. Sweet flag loves a moist spot such as a bog but will also grow in ordinary garden soils...a real easy-to-grow, carefree prize!
moss
Mosses are commonly found in moist, shady locations and are best known for those species that carpet woodland and forest floors. Mosses may range in size from microscopic forms to plants more than 1 metre (40 inches) long. They differ primarily in the structure and specialization of their sporangia (spore cases). The stemlike and leaflike structures of moss plants constitute the gametophytic (sexual) generation.
Phytoplankton
Phytoplankton do not require true leaves, stems, or roots like most
plants. This is because they absorb water and nutrients directly from the
environment. Phytoplankton have developed many pores, spines, and other
projections
duck weed
Duckweed tends to grow in dense colonies in quiet water such as ponds, marshes, lakes and slow-moving streams. Often more than one species of duckweed will be associated together in these colonies
sagittaria
Sagittaria plant stock (the perennial rhizome) is a horizontal creeper (stoloniferous) and tuberous, a thick, fleshy root without buds. Leaves may be aerial, floating or submerged. The Flowers can be unisexual or polygamous, and vary in umbels, umbrella-like forms from a central stalk, Racemes (bunches) or loose branching Panicles arranged with female or Hermaphrodite flowers at the base and male flowers above, or occasionally with the Flowers all male or all female.
green river grass
Grass floats in a river in the United States. River habitats, called riparian systems, often contain lush vegetation and a wealth of animal species
brazilian pennyworth
brazilian Pennywort is very similar to another marsh plant, Cardamine lyrata (also known as Japanese Cress). The Japanese Cress has smaller leaves, while the Brazilian Pennywort is faster growing and less demanding.
lotus
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water violets
In fact, botanists often refer to this freshwater aquarium plant as Water Violet due to the vibrant purple flowers it produces. Grown in slightly dense patches and reaching a height of 80 cm, Hottonia palustris serves as an ideal hiding place for invertebrates such as beetles, water spiders,dragonflies and damselflies.