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Vegetative Morphology

 
Plants annual or perennial; cespitose, sometimes rhizomatous.
Culms 10-180 cm, glabrous or hispidulous.
Nodes 2-5, glabrous.
Sheaths open, smooth or scabrous.
Auricles absent.
Ligules hyaline, glabrous, obtuse to acute.
Blades flat, smooth or scabrous over the veins.

Reproductive Morphology

 
Inflorescences open panicles.
Branches drooping to ascending, smooth or scabrous.
Spikelets dorsally compressed, with 1 floret.
Rachillas not prolonged beyond the fertile floret.
Disarticulation above the glumes.
Glumes equal, equaling or exceeding the lemmas, membranous, smooth or scabrous.
Calluses blunt, glabrous.
Lemmas coriaceous, glabrous, lustrous, margins involute, obscurely 5-veined.
Paleas similar to the lemmas and partly enfolded by them.
Lodicules 2, free, glabrous, toothed or not toothed.
Anthers 3.
Caryopses glabrous.
Hila 1/5 to nearly 1/2 the length of the caryopses.

Species Distribution Maps

Milium effusum Milium vernale

Chromosome Number(s)

x = 4, 5, 7, 9.

Additional Notes

Name from an old Latin word for millet, an appellation which is associated with species in several different genera.

Milium is a circumtemperate genus of four species. All the species grow in mesic to dry mixed woods and dry open habitats. Milium effusum is native to the Flora region; M. vernale has become established here.

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Name/Synonymy Publication Info

Milium L., Sp. pl. 1:61 (1753). Miliarium Moench, Methodus 204 (1794). TYPE: Milium effusum L.

Treatment from

W.J. Crins. Milium in Flora of North America, volume 24. In prep. Oxford University Press.

Fact Sheet Developed By

Pedro Oñativia Lake © 2006.