Red root or Ceanothus americana increases platelet counts that my have been lowered as a result of chemotherapy.
From The Way of Herbs, Michael Tierra, L.Ac., O.M.D.:
Ceanothus
Parts Used: Roots
Energy and Flavors: Bitter, astringent, cool
Systems Affected: Lymphatic system, liver, spleen
Biochemical Constituents: Various alkaloids
Properties: Lymphatic stimulant, expectorant, antispasmodic, astringent. Ceanothus can be used for lymphatic cleansing, enlarged spleen and liver, colds, bronchitis, whooping cough, tonsilitis, diphtheria, sinus conditions, nosebleeds, uterine bleeding, and hemorrhoids. Red root increases platelet counts that may have been lowered as a result of chemotherapy. It also improves digestion and assimilation, and firms up stools.
Dose: A decoction of 1 ounce to 1 pint of boiling water simmered for 20 minutes. Take ½ cup three times daily; or 10-30 drops of the fluid extract.
Used For: Lymphatic congestion, enlarged spleen or liver, bronchitis, uterine bleeding, hemorrhoids, increasing the platelet count as a result of chemotherapy, cancer