Categories of Plants at Patuxent
The variety of plants in the collection are categorized as follows:
- Primitive species:
- these include the alga, ferns, horsetails,
clubmosses, spikemosses, and quillworts.
- Woody plants:
- plants that have one or more permanent stems above
ground and remain above ground throughout the winter.
The stems and branches have a woody core that supports
the structure of the plant. They include shrubs, bushes,
- Sedges and Rushes:
- grasslike plants, sedges usually have triangular
solid stems, pointed leaves, and flowers borne in
spikelets; rushes usually have round stems, linear leaves
and inconspicuous flowers.
- plants in the family Poaceae, they have narrow leaves,
small inconspicuous flowers, and hollow stems with joints where the leaves attach.
- characterized by their usually broad leaves, these flowering plants
have green non-woody stems and many live for only one or two years.
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