Phalaris arundinacea

Plants perennial; not cespitose, rhizomatous, rhizomes scaly. Culms 40-230 cm. Ligules 4-10 (11) mm, truncate, lacerate; blades usually 10-30 cm long, 5-20 mm wide, flag leaf blades 4-15 cm, surfaces scabrous, margins serrate. Panicles 5-40 cm long, 1-4 cm wide, elongate, often dense, always evidently branched, at least near the base; branches to 5 cm, normally appressed but spreading during anthesis, spikelets borne singly, not clustered. Spikelets homogamous, with 3 florets, terminal floret bisexual; disarticulation above the glumes, beneath the sterile florets. Glumes subequal, 4-8.1 mm long, 0.8-1 mm wide, keels smoothly curved, usually scabrous, not or narrowly winged distally, wings to 0.2 mm wide, lateral veins conspicuous, apices acute; sterile florets 2, subequal to equal, 1.5-2 mm, less than 1/2 as long as the bisexual florets, hairy; bisexual florets 2.5-4.2 mm, apices acute to somewhat acuminate; lemmas glabrate proximally, hairy distally and on the margins, dull yellow when immature, shiny gray-brown to brown at maturity, apices acute; anthers 2.5-3 mm. 2n = 27, 28, 29, 30, 31, 35.

3-6 hours of sun per day, with protection from intense mid-day sun

Water moderately, allowing the top 3cm to dry out between watering.

Phalaris Arundinacea

Phalaris arundinacea

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