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Characeae is a family of freshwater green algae in the order Charales, commonly known as stoneworts. They are also known as brittleworts or skunkweed , from the fragility of their lime-encrusted stems, and from the foul odor these produce when stepped on.
Extant (living) species are placed in a single order Charales, [2] commonly known as "stoneworts" and "brittleworts". Fossil members of the class may be placed in separate orders, e.g. Sycidiales and Trochiliscales. [1] Charophyceae is basal in the Phragmoplastophyta clade which contains the embryophytes (land plants).
Charales is an order of freshwater green algae in the division Charophyta, class Charophyceae, commonly known as stoneworts. Depending on the treatment of the genus Nitellopsis , living (extant) species are placed into either one family ( Characeae ) or two (Characeae and Feistiellaceae ).
Flagellate sperm, however, are found in stoneworts and Coleochaetales, orders of parenchymatous charophytes that are the closest relatives of the land plants, where flagellate sperm are also present in all except the conifers and flowering plants. [14] Fossil stoneworts of early Devonian age that are similar to those of the present day have ...
The plant body is a gametophyte.It consists of the main axis (differentiated into nodes and internodes), dimorphic branches (long branch of unlimited growth and short branches of limited growth), rhizoids (multicellular with oblique septa) and stipulodes (needle-shaped structures at the base of secondary laterals).
A plum tree with developing fruit Mandarin Orange tree with fruit An almond tree in bloom. A fruit tree is a tree which bears fruit that is consumed or used by animals and humans.— All trees that are flowering plants produce fruit, which are the ripened ovaries of flowers containing one or more seeds. In horticultural usage, the term "fruit ...
Pollen grains can be physically transferred between plants by the wind or animals, most commonly insects. Pollen grains can also transfer to an ovule of the same plant, either with the same flower or between two flowers of the same plant (self-fertilization). When a pollen grain reaches an ovule, it enters via a microscopic gap in the coat, the ...
Phyllanthus acidus is an intermediary between a shrub and tree, reaching 2 to 9 m (6½ to 30 ft) high. [2] The tree's dense and bushy crown is composed of thickish, tough main branches, at the end of which are clusters of deciduous, greenish, 15-to-30-cm long branchlets.