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Spotted JoePye Weed

Eutrochium maculatum (L.) E.E. Lamont

(formerly Eupatorium maculatum L.)

Asteraceae (Sunflower Family)

▲▼ mature flowering plants

▲ flower head inflorescences

▲ stems and leaves, showing whorled leaf arrangement

Eutrochium maculatum (L.) E.E. Lamont, (formerly Eupatorium maculatum L.), Spotted Joe-Pye-Weed:  (Bayer Code:  EUPML; US Code EUMA6)

·         U.S.  native simple perennial with solid, purple (or green with purple spots) usually with short, soft hairs; stems that can grow 2-7 feet tall; stem branching can be from base, but more in upper ½ to 1/3 of stem

·         Leaves are in whorls of 4-5 at nodes, lighter green, lanceolate, with toothed margins

·         Head inflorescences are born in rounded to almost flattened panicles at tips of stems

·         Individual flower heads are about 0.33 inch diameter, with 8-20 pink , dusty-pink to purplish disk flowers (no ray flowers)

·         Bracts below inflorescence are in multiple layers, oval, purplish-pink; tips are round-pointed

·         Flowering time is from mid-summer to early fall

·         Prefers moist, fertile soils in meadows, pastures, prairies, along ditches, marshes, streambanks; is also widely-planted as a rain-garden, wetland prairie plant, or as an ornamental in landscapes, wildflower areas

·         May be toxic if overgrazed, but a favorite of butterflies

·         Similar species include:

     o   Hollow-stemmed Joe-Pye Weed (Eutrochium fistulosum) has hollow, usually hairless stems, and large, open panicle inflorescences; flower heads have 5-7 disk flowers

     o   Sweet Joe-Pye Weed (Eutrochium purpureum) has mostly solid stems, but flowers are more lilac, pink or whitish, and flower heads have 4-6 disk flowers


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