Trevor James, AgResearch / Kerry Bodmin, NIWALeaves are not flat, usually with a single flower head; flower stalks rarely start from a central point
Trevor James, AgResearchPith is interrupted
Trevor James, AgResearchFlowers are grouped at the ends of branches
Trevor James, AgResearchStems are not bright green, and capsules are 2-3.5 mm long
Trevor James, AgResearchFlowers are evenly-distributed along branches
