Gillenia

Gillenia trifoliata

The Gillenia are a genus of flowering plants of the rose family ( Rosaceae ).

Description

Gillenia are perennial herbaceous plants. Its leaves are alternate, pinnately trifoliate and short stalks, the individual leaflets have cut edges. Stipules are both large and small available.

The inflorescence is a terminal, screen grapes or similar rispenähnliche composite grape. The flowers are long-stalked and quite large. The flower cup is bell - up tubular, an outer cup is missing. The sepals are imbricated over one another, the petals are white to pale pink.

A discus is not visible, there are ten to twenty stamens. The five stamps are straight up and stand in front of the sepals. The two to four ovules are grown close to the approach and apotrop.

The fruit is a follicle with knöchrigem pericarp, which soon bursts the flower cups during growth. One to four seeds are relatively large. The chromosome number is 2n = 18

Dissemination

Gillenia found in North America in Canada ( Ontario) and the eastern United States in mountain forests.

System

The genus was first described in 1802 by Conrad Moench. It is made available to a tribe in the Supertribus Pyrodae the subfamily Spiraeoideae without assignment. One to the present day frequently used synonym is Porteranthus. There are two types:

• Southern three-blade spar ( Gillenia stipulata )
• Northern three-blade spar ( Gillenia trifoliata )

Evidence

• C. Kalkman: Rosaceae. In: Klaus Kubitzki (ed.): The Families and Genera of Vascular Plants - Volume VI - Flowering Plants - Dicotyledons - Celastrales, Oxalidales, Rosales, Cornales, Ericales. Springer -Verlag, Berlin, 2004, pp. 359, ISBN 978-3-540-06512-8