What it is:
This herb is the pollen of Typha angustifolia L., or other plants of the same genus (family Typhaceae) which is produced in all parts of China. The stamenate flower on its florescence is collented in summer, dried in sunlight, crushed and sieved to get the fine powder which is used unprepared or carbo-nized by stir-baking.

Property:
Flavour and channel tropism: sweet in flavour, nutral in property, acting on the liver and pericardium channels.

Effects:
Stopping bleeding and removing blood stasis.

Used for:
1. Many kinds of bleeding, such as hemoptysis, epistaixs, hematemesis, hematuria, hemafecia, metrorrhagia and metrostaxis, and traumatic bleeding. It can be used alone or in combination with hairy vein agrimony, eclipta and biotatopa, for traumatic bleeding. It can be used externally.

2. For treating cardiac or abdominal pains, post partum abdominal pain and dysemnorrhea due to retention of blood in the interior. It is often used with trogopterus dung, as in Wonderful Powder for Relieving Blood Stagnation (hixiao San). Besides, this herb also has the effect of inducing diuresis and therefore it is used with cluster mallow seed and diredrehmannia root in the treatment of painful and difficult hematuria, as in the Powder of Catail Pollen (Puhuang San).

Precautions:
Unprepared pollen can cause contraction of the uterus and therefore it should not be prescribed to pregnant women.