Name: Asclepias syriaca L.
Croatian name: Svilenica, Cigansko perje
English name: Common Milkweed, Silkweed
This is a tall and robust perennial plant. It grows often in great number along on the river banks and fields, along the roads and wasteland. Loves sunny spots. It can be up to 2.5 m tall.
It spreads by rhizomes and can be very invasive. The whole plant contains a white latex. Leaves are set opposite on the stem. They are ovate having red main vein and smooth, velvety underside. Petiole is very short.
The flowers are grouped in umbels. The inflorescence is set axillary along the stem and on the top of the plant as well. The flower is small, reddish in colour. They have 5 petals. It flowers from May to July.
Fruit (follicle) splits open when dry releasing numerous silky-tailed seeds that disperse by the wind (anemochory).