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• Dichotomous Key
• Poaceae
• Poaceae Group 5
• Triticum
• Triticum turgidum

Triticum turgidum — rivet wheat

Facts

N/A

Habitat

Anthropogenic (man-made or disturbed habitats)

Characteristics

• Flowers

  Anther number

  3

  Awn on glume

  • the glume has an awn
  • the glume has no awn

  Bristles below spikelets

  no

  Floret lower bract texture

  • the lemma is hard and firm
  • the lemma is thin and flexible

  Floret number

  5–7

  Floret types within spikelet

  all the florets within a spikelet are similar

  Glume awn length

  0–3 mm

  Glume keel

  • the glume keels are rough or hairy
  • the glume keels are smooth and hairless

  Glume relative length

  neither glume is quite as long as all of the florets

  Glume shape

  the glume is V-shaped in cross-section

  Glume veins

  • 3
  • 5
  • 7 or more

  Glumes per spikelet

  2

  Inflorescence axis hairs

  the inflorescence axis is hairy but not rough or sand-papery feeling

  Inflorescence axis orientation

  • the inflorescence axis bends downwards or hangs
  • the inflorescence axis is arched or curved outward
  • the inflorescence axis is straight

  Inflorescence branch length

  At least 0 cm

  Inflorescence branches

  • the flowers are attached to branches rather than to the main axis of the inflorescence
  • there are no branch points between the base of the inflorescence axis and the flowers, or they are not obvious

  Inflorescence branches coming off the lowest stem node

  At least 0

  Inflorescence crowding

  • NA
  • the panicle is somewhat to very congested (crowded), and the branches may not be clearly seen without close inspection

  Inflorescence length

  70–140 mm

  Inflorescence type (general)

  the inflorescence is a spike, or is spike-like, lacking obvious branches

  Inflorescence type (specific)

  • the inflorescence is a raceme (a long unbranched stem with stalked flowers growing along it)
  • the inflorescence is a spike (a long unbranched stem with flowers along it that lack stalks)
  • the inflorescence is branched, and the branches do NOT both grow from the same side of the plant AND look like spikes

  Inforescence position

  the spikelets are mainly carried at the end of the stem

  Lemma awn base

  the awn is attached right at the tip of the lemma

  Lemma awn coiled

  the lemma awn is straight or twisted, but not coiled one half turn

  Lemma awn length

  0–200 mm

  Lemma awn number

  • the lemma has no awn
  • the lemma has one awn on it

  Lemma awn orientation

  • the awn of the lemma is straight
  • the awn of the lemma on dried or older plants is curved or bent outwards

  Lemma cross-section

  the lemma is flat or rounded if you cut across the midpoint

  Lemma keel hairs

  NA

  Lemma surface

  the surface of the lemma is relatively smooth (not counting any longitudinal veins or hairs)

  Lemma tip shape

  the lemma tip tapers to a narrow point (it may or may not also have an awn or teeth at the tip)

  Lemma vein number

  • 5
  • 7 or more

  Lemma vein orientation

  the veins on the lemma stay roughly parallel throughout

  Lower glume length

  8–11 mm

  Lower glume relative length

  the lower glume is nearly as long, or as long as, the upper glume

  One or more florets

  there is more than one floret per spikelet

  Reproductive system

  all the flowers on the plant have both carpels and stamens (synoecious)

  Spikelet axis tip

  there is no extension of the spikelet axis beyond the tip of the spikelet

  Spikelet disintegration

  • NA
  • the spikelet breaks off above the glumes, so that after the florets fall off, the glumes remain

  Spikelet length

  10–16 mm

  Spikelet number per node

  Up to 1

  Spikelet pedicel

  the spikelets do not have pedicels

  Spikelet pedicel length

  0 mm

  Spikelet shape

  the spikelets are oblong (rectangular, but with rounded ends) in profile

  Spikelet width

  8–15 mm

  Spikelets per panicle branch

  At least 0

  Spikelets spiny

  the spikelets do not appear spiny

  Tip of glume

  • the tip of the glume is divided into two or more points
  • the tip of the glume is not divided (though it may have an awn on it)

  Upper glume length

  8–11 mm

  Upper glume relative length

  the upper glume is more than one half as long as the lowest lemma

  Upper glume shape

  the upper glume is widest at or below the middle

• Fruits or seeds

  Groove on seed

  the caryopsis has a groove running most of its length

• Growth form

  Horizontal rooting stem

  no

  Lifespan

  the plant lives only a single year or less

  Rhizomes

  no

  Roots

  there are only slender roots on the plant

• Leaves

  Leaf auricles

  the leaves have auricles

  Leaf basal lobe hairy

  the lobes at the base of the leaf blades have tiny fine hairs on them

  Leaf blade cross-section

  the leaf blade is more or less flat in cross-section, or slightly folded or rolled inwards

  Leaf blade hairs

  the leaf blade is hairy

  Leaf blade length

  10–60 cm

  Leaf blade width

  10–18 mm

  Leaf ligule type

  the leaf ligule is in the form of a membrane

  Leaf margin glands

  there are no glands along the edges of the leaf blade

  Leaf sheath closed around stem

  the margins of the leaf sheath are overlapping and not fused together except in the basal half (or less)

  Leaf sheath color and persistence

  the leaf sheathes are off-white to light-brown and mostly persist in older leaves

  Leaf sheath hair type

  there are no hairs on the surface of the leaf sheath

  Leaf sheath hairs

  there are no hairs on the surface of the leaf sheath

• Place

  Habitat

  terrestrial

  New England state

  Connecticut

  Specific habitat

  man-made or disturbed habitats

• Stem, shoot, branch

  Hairs at nodes

  the stem nodes are hairless or they have very sparse hairs

  Plant height

  120–180 cm

  Stem orientation

  the stems are upright

  Stem spacing

  the stems grow close together in compact clusters or tufts

Wetland status

Not classified

New England distribution and conservation status

From the dichotomous key of Flora Novae Angliae