Holcus lanatus

Species category

Turf

Common name

common velvetgrass, velvetgrass, Yorkshire fog

Diagnostic characters

Planting unit

SpikeletSpikelet:
One or more florets that are subtended by a pair of bracts called glumes. Spikelets are pedicellate if located on a pedicle and sessile if attached directly to the rachis. Often spikelets with single florets have remnants of a second floret, usually a lemma.

Shape

OvateOvate:
Egg-shaped with basal end the broadest.

Size

  • Length 4–4.6 mm
  • Width 1.2–1.8 mm 
  • Thickness 0.6–0.8 mm 

Color

Light brown

Texture

GlumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
glandular with long hairs on keel nerves

Lemma

Under glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
shiny; laterally compressed and humped.

Palea

Under glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
shiny; laterally compressed and straight.

Other structures

First glumeGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
narrow, second glumeGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
wide with strong nerves on sides

Identification notes

The main structure is the spikeletSpikelet:
One or more florets that are subtended by a pair of bracts called glumes. Spikelets are pedicellate if located on a pedicle and sessile if attached directly to the rachis. Often spikelets with single florets have remnants of a second floret, usually a lemma.
with glumesGlume:
The pair of chaffy bracts that occur at the base of a grass spikelet, often completely enclosing it.
that are papery and glandularGlandular:
The surface appearing to be covered with minute glands or spheres.
, with hairs on the keel nerves. SpikeletSpikelet:
One or more florets that are subtended by a pair of bracts called glumes. Spikelets are pedicellate if located on a pedicle and sessile if attached directly to the rachis. Often spikelets with single florets have remnants of a second floret, usually a lemma.
contains two florets: the first is fertile and the second is only staminate.

Noxious weed seed categories

State Noxious Weed: Delaware, Maryland, New Hampshire, New Jersey, Pennsylvania, Virginia, West Virginia

AOSA examination list

Included

More information

For more information, see ISMA fact sheet.

Nomenclature

Family

Poaceae

Valid name

Holcus lanatus L.

Synonyms

Nothoholcus lanatus (L.) Nash

 Holcus lanatus.  Spikelets with glumes that are papery and glandular with hairs on the keel nerves. 
Holcus lanatus. Spikelets with glumes that are papery and glandular with hairs on the keel nerves. 
 Holcus lanatus.  Spikelets and florets.
Holcus lanatus. Spikelets and florets.
 Holcus lanatus.  Spikelets with a narrow first glume and a second glume that is wide with strong nerves on the sides. 
Holcus lanatus. Spikelets with a narrow first glume and a second glume that is wide with strong nerves on the sides.