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Milkweed, Asclepias syriaca

Milkweed is a tall plant with characteristic large oblong entire leaves. The umbel inflorescence consists of flowers with white to deep pink petals. The sap of milkweed is white, viscous, and poisonous.

Asclepias syriaca
Asclepias syriaca
Milkweed
Asclepiadaceae
June 2003, Amherst, MA

Milkweed flowers have five pink corolla and reflexed corolla segments. The corolla structure called hood encloses a horn that curves inward. The photo shows follicles inside of the gynostegium.

Asclepias syriaca Asclepias syriaca
Asclepias syriaca Asclepias syriaca
June - July 2003, Amherst, MA

Shown below is milkweed follicles. The photo on the right shows the longitudinal section of a follicle. The bottom image shows the seeds.

Asclepias syriaca Asclepias syriaca
Asclepias syriaca
Asclepias syriaca
July 2003, Amherst, MA

In fall, the follicle opens and the seeds emerge.


October 2004, Montréal, Canada

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Erica Asai
Last Modified: Thu Jan 06 13:13:58 2005