Description
Phalaris arundinacea is a robust, cool-season, sod-forming perennial grass that produces culms (stems) from creeping rhizomes. The culms grow 0.6 to 2m tall. The leaf-blades are flat, 0.2 to 2cm wide and up to 0.5m long. Flowers are arranged in dense, branched panicles that can exceed 5 to 20cm in length. Immature panicles are compact and resemble spikes, but they open and become slightly spreading at anthesis. Spikelets are lanceolate, 5mm long and pale. Most contain three florets, two of which are extremely reduced, linear and infertile. One of the distinguishing features of the genus Phalaris is the presence of some infertile florets. The lemmas in the infertile florets are approximately 1mm long while those of the fertile florets are 3 to 4.5mm long. The glumes are strongly compressed and wingless.
DescriptionPhalaris arundinacea is a robust, cool-season, sod-forming perennial grass that produces culms (stems) from creeping rhizomes. The culms grow 0.6 to 2m tall. The leaf-blades are flat, 0.2 to 2cm wide and up to 0.5m long. Flowers are arranged in dense, branched panicles that can exceed 5 to 20cm in length. Immature panicles are compact and resemble spikes, but they open and become slightly spreading at anthesis. Spikelets are lanceolate, 5mm long and pale. Most contain three florets, two of which are extremely reduced, linear and infertile. One of the distinguishing features of the genus Phalaris is the presence of some infertile florets. The lemmas in the infertile florets are approximately 1mm long while those of the fertile florets are 3 to 4.5mm long. The glumes are strongly compressed and wingless.
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