The Milkweed Family East of the Cascade Mountains of Oregon and Washington

Apocynaceae (formerly Asclepiadaceae)

Purple Milkweed: Asclepias cordifolia -

Davis' Milkweed, Pallid Milkweed, Humboldt Milkweed, Purple Milkweed: Asclepias cryptoceras ssp. davisii (Synonyms: Asclepias cryptoceras, Asclepias cryptoceras var. davisii, Asclepias davisii) -

Mexican Whorled Milkweed, Narrowleaf Milkweed, Narrow-leaf Milkweed, Narrow-leaved Milkweed: Asclepias fascicularis (Synonym: Asclepias mexicana) -

Swamp Milkweed: Asclepias incarnata - Okanogan County, WA.

Showy Milkweed, Greek Milkweed: Asclepias speciosa (Synonym: Asclepias giffordii) -

** Other Members of the Apocynaceae East of the Cascade Mountains