Bulbous bluegrass

Poa bulbosa

This is an annual or perennial grass forming dense clumps up to about 60 centimeters tall. The stems are smooth and hollow and usually have bulbous sections at their bases about a centimeter in length. The grass is more likely to have bulbous sections if it is growing in a drier area, and study has indicated the bulbous sections are mostly water. If the bulbous bases are detached and replanted they can give rise to new plants. The inflorescence is a wide cluster of branches bearing green leaflike spikelets with darker bases that contain bulbils. Viable seed is rarely produced, and the plant usually reproduces asexually via its basal bulbous sections and via bulbils. Although the plant reproduces vegetatively (asexaully) most of the time, it has been shown to possess high genetic variability.

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