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Pineapple Weed
Disc Mayweed

Matricaria discoidea
(Chamomilla sueveolens
Matricaria matricarioides)

Matricaria discoidea photo © by Michael Plagens

Photographed in Glendale, Maricopa Co., Arizona. April 2016.

ANNUAL: Very small to medium-sized annual of spring time in the Sonoran Desert. Few plants exceed 10 cm in height with several stems branching from near base.

FLOWERS: Numerous pale green-yellow disc flowers arranged conically and without rays. The effect is that the flower heads look like tiny buttons. Opening March to May.

LEAVES: Smooth leaves are pinnately divided into narrow segments. On crushing they sometimes emit pineapple or chamomile aroma. Some plants have little or no such aroma.

RANGE: Requires a good supply of moisture and so is typically found in riparian habitats or as a weed in irrigated gardens.

FRUIT: Small seeds topped with papery scales.

UNARMED. Lacks spines/thorns.

Asteraceae -- Sunflower Family

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More Information:

Sonoran Desert Field Guide
Sonoran Desert Places
Sonoran Desert Naturalist Home Page


Copyright Michael J. Plagens, page created 18 Apr. 2010,
Updated 9 Apr. 2016.