Coleostephus myconis aka Mediterranean Marigold

Coleostephus myconis belongs to the daisy family, also called Asteraceae. It is an annual plant, with a yearly life cycle. Kew gives the Mediterranean as its native range. Kew also places it in the subtropical climate group. These records tell us where the plant comes from. They do not tell us what garden care it needs. Its native range and climate group alone do not establish those needs.

The Royal Horticultural Society accepts Coleostephus myconis as the correct name. The RHS lists two other names for this species. These are Chrysanthemum myconis and Chrysanthemum multicaule. They are synonyms, or other names for the same plant. These names help link older plant records to this species. The RHS also states that the plant is not native to Britain. It gives the same finding for Ireland.

The sources establish that this plant has an annual life cycle. Yet they give no height for a full-grown plant. Nor do they say how wide it will grow. They give no details about its leaves or stems. They also give no account of its flowers or fruit. Thus, these sources do not support a fuller account of its form. The names and life cycle do not fill those gaps. There is no basis here for giving a size range.

The supplied RHS text gives no steps for growing this plant. The evidence does not state what soil it needs. It does not establish how much water it needs. Nor does it say how much light to give it. Its hardiness, or ability to cope with cold, is not established. The broad climate record does not supply these missing care details. The evidence also gives no details about its uses in gardens. It says nothing about pests or diseases that may affect it.

Neither source establishes whether any part is safe to eat. Neither source establishes whether the plant is toxic, or can cause harm. These are gaps in the safety data, not proof of safety. The lack of a warning does not mean it is safe. The evidence supports no claim that the plant is edible or free from risk.