Plants of the Castlemaine District
Northern Barley-grass - introduced (*Hordeum glaucum)
Native to the Mediterraneum area and Europe. Annual. C3.
Family. Poaceae (Grass family).
Other names: *Critesion murinum ssp glaucum.
- the flower cluster is dense and spike-like cluster
- as in other barley grasses, the spikelets are in threes, which fall together
- the glumes and lemmas taper into long stout awns
- the leaves are flat
- the ligules are membranous, and 0.5-1mm long.
The outer glumes of the outer spikelets are narrow at the base; the glumes of the inner spikelet and inner glumes of the outer spikelets are widened at the base.
It is an environmental weed.
1: Changing colour with age. Castlemaine. 2: The three spikelets have not been spread. 3: Barley-grass flower clusters.
It differs from Barley-grass in that
- the anthers of the central floret of are pale (dark in H. leporinum)
- the stem just below the join of the spikelets is c2mm (2.5mm or more in H. leporinum)
- the stem just below the join of the spikelets is straw-coloured (greenish in H. leporinum)
- the leaves are usually blue-green (glaucous) (green in H. leporinum).