Morphology

A perennial grass with culms 60-160 cm tall, 2.5-5 mm thick. Ligules 7-12 mm. Blades 20-30 cm long, (2.5)4-12 mm wide.

Panicles 20-50 cm long, 2-15 cm wide. Branches 4.5-18 cm long. Spikelets 13-23 mm long, 1.5-3.5 mm wide, with 6-13 florets. Lower glumes 1.1-2.8 mm. Upper glumes 2.9-3.7 mm. Lemmas 4.5-5.9 mm. Anthers 2, 0.6-1.6 mm.

Name/Synonymy Info

Glyceria ×occidentalis (Piper) J.C. Nelson, Torreya 19:224 (1919). Panicularia occidentalis Piper in Piper & Beattie, Fl. n.w. coast 59 (1915). TYPE: U.S.A., Washington: Vancouver; 5 Jun 1904; C.V. Piper 4905 [G. fluitans (L.) R. Br. × G. leptostachya Buckley].

---

References

M.E. Barkworth & L.K. Anderton. 2007. Glyceria in Flora of North America, volume 24. Oxford University Press.

---