- Trevor James, AgResearch
Leaves originate at the base and up the stem, and are usually narrow and often wiry
- Trevor James, AgResearch
Leaves are not reflexed above the sheath
- Trevor James, AgResearch
Leaves are bristle-like or thread-like (filiform)
- Trevor James, AgResearch
Leaves are bristle-like, and plants are usually taller than 2 cm
- Larry Allain, USGS, Wetland & Aquatic Research Center / Trevor James, AgResearch
Stem has cross walls below flower heads
- Kerry Bodmin, NIWA / Trevor James, AgResearch
Stem does not have cross walls below flower heads
- Kerry Bodmin, NIWA / Trevor James, AgResearch
Plant has more than 5 flower heads
- Trevor James, AgResearch
Capsule tapers to its tip
- Trevor James, AgResearch / Kerry Bodmin, NIWA
Capsule is 2.5-3 mm long
- Trevor James, AgResearch / Ros Cole, Department of Conservation
Tepals are 3 mm long or less
- Trevor James, AgResearch
Flower heads have fewer than 30 flowers, and leaves are not bristly