Matricaria discoidea
Radiation lots Chamomile (Matricaria discoidea )
The rays lots Chamomile (Matricaria discoidea ) is a species of the genus of Chamomile (Matricaria ); it belongs to the subfamily of herbaceous within the sunflower family ( Asteraceae).
It owes its name to the absence of the white ray florets.
Description
The rays Mayweed is an annual herbaceous plant that reaches the heights of growth of about 5 to 40 centimeters. In contrast to the genuine chamomile rayless chamomile has no white ray florets. Your hermaphrodite tubular flowers are yellowish - green and very fragrant.
The flowering period is from June to September (rarely also in October).
Ecology
The flowers are pollinated by insects ( especially Diptera ) or pollinate itself, it is a typical passage Plant: The fruit become mucilaginous when wet, then stick to shoes, glue tires, etc. and can be dispersed across great distances.
The plant smells like the chamomile (Matricaria chamomilla ), its essential oil, however, is put together differently, so that it can not be used as a substitute for this. An entrained in eastern North America form has apple smell.
Occurrence
The rays Mayweed is originally distributed in Northeast Asia and the Pacific North America. It occurs in temperate zones worldwide as a neophyte. In Central Europe it was first observed in 1852 as Gartenflüchter from the Botanical Garden in Berlin and is now completely naturalized.
It occurs in step lawn, especially in settlement nearby; they grow there, often in larger groups. It prefers open, nutrient-rich, dense loam and clay.
After Ellenberg it is a light plant, a default heat pointer, a pointer freshness, a weak acid to weak base pointer, an outspoken nitrogen pointer and a Verbandscharakterart the Knotgrass Kick lawn companies ( Polygonion avicularis ).
System
Synonyms for radiation Mayweed are:
- Artemisia matricarioides auct. non Less.
- Matricaria matricarioides auct. non ( Less. ) Porter
- Santolina suaveolens Pursh
- Chamomilla suaveolens ( Pursh ) Rydb.
- Matricaria suaveolens ( Pursh ) Buchenau
- Tanacetum suaveolens ( Pursh ) Hook.