Three plant families you wanted to know but were too afraid to ask
Among the numerous
taxonomic groups described by scientists in the last 300 years, families of
flowering plants hold the distinct place. They were established in
collaborative efforts of French botanists, namely Michel Adanson and Antoine
Jussieu. Adanson based his research on methods which are now frequently called
“bioinformatics” and therefore was long ahead of his time. Jussieu proved
Adan-son’s ideas by establishing the living garden where plants were arranged
by these families. At first, families were not accepted by “fathers of botany”
like Carolus Linnaeus. But with time, more and more facts were accumulated
which support the ideas enclosed in the families differentiation. The most
amazing was almost absolute support of plant families concepts with new
molecular methods. Many groups which looked stable (like orders of birds and
mammals) appeared less robust than plant families. This is why plant families
are so important.
Practically, families
provide a great help in knowing plants. For example, the flora of whole North
America has 20,000 species of plants. It is almost impossi-ble to remember them
all. However, there are only 200 plant families in North America. Therefore,
knowing the family saves lots of time and efforts in plant determination.
Several plant families
are especially important since they play a big role in eco-nomics, form
widespread types of vegetation, or are simply extremely rich in species. Three
of these families will be characterized below. Characterization of family
should follows the plan below:
1.
Meta-information: name, position in classification, number of species,
distribution
2.
Ecological preferences
3.
Morphology and anatomy of stem, leaf and root
4.
Generative organs from inflorescence to fruit, including flower diagrams
and formulas. Seed.
5.
Representatives and their importance
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