Eupatorium maculatum L.
Eupatorium purpureum L. var. maculatum (L.) Darl.
Eutrochium maculatum (L.) E.E. Lamont
Spotted joe-pye weed, spotted trumpet-weed
An American native named Joe-Pye is believed to have used this plant to cure fevers, becoming the namesake for this and several related species.
Plants: Spotted Joe-Pye weed is 2–6′ (60–182 cm) in height. This plant can be distinguished from several close relatives by its deep purple or purple-spotted stem.
Leaves: Whorled, in groups of three to six. Each leaf is up to 9 ⨉ 2″ (22 ⨉ 5 cm). Leaves have coarse teeth, short petioles, and smell like vanilla when crushed.
Flowers: Individual flowers are very small, forming clusters 4–6″ (10–15 cm) across, that are pink or lavender in color. Each flow lacks ray florets, and 8-20 disc florets, looking a bit furry.
Fruits: Hairy achenes are wind-dispersed. They contain seeds 1/16–⅛″ (3–4 mm) long, and five-sided.
Habitats: Sunny marshes, rich fens and swamps; as well as man-made moist expanses such as ditches, seepage areas and wet fields.
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Similar species. |
Online References:
References:
Eupatoriadelphus maculatus (L.) R.M. King & H. Rob.
Eupatorium maculatum L.
Eupatorium purpureum L. var. maculatum (L.) Darl.
Eupatorium maculatum L.
Eupatorium purpureum L. var. maculatum (L.) Darl.
8/4/2009 · Near Nashoba Hospital, Ayer, Massachusetts · ≈ 1 × 1½′ (40 × 52 cm) 
8/15/2021 · Bass Falls Preserve, Alna, Maine · ≈ 7 × 4½″ (16 × 11 cm) 
8/3/2012 · Bemis Rd Conservation Area, Pepperell, Massachusetts · ≈ 9 × 6″ (23 × 15 cm) 
8/2/2015 · Mt. Watatic, Ashby area, Massachusetts · ≈ 7 × 4½″ (16 × 12 cm) 
8/3/2012 · Bemis Rd Conservation Area, Pepperell, Massachusetts · ≈ 6 × 4″ (15 × 10 cm) 
8/2/2015 · Mt. Watatic, Ashby area, Massachusetts · ≈ 6 × 4½″ (15 × 12 cm) 
8/13/2012 · Squannacook River Wildlife Management Area, Groton, Shirley, & Townsend, Massachusetts · ≈ 5 × 6″ (13 × 14 cm) 
8/15/2021 · Bass Falls Preserve, Alna, Maine · ≈ 7 × 4½″ (16 × 11 cm) 
8/13/2012 · Squannacook River Wildlife Management Area, Groton, Shirley, & Townsend, Massachusetts · ≈ 9 × 6″ (23 × 15 cm) 
8/13/2012 · Squannacook River Wildlife Management Area, Groton, Shirley, & Townsend, Massachusetts · ≈ 13 × 10″ (33 × 26 cm) 
8/3/2012 · Bemis Rd Conservation Area, Pepperell, Massachusetts · ≈ 6 × 4½″ (16 × 11 cm) 
8/6/2013 · Dunstable Rural Land Trust, Dunstable, Massachusetts · ≈ 5 × 4½″ (12 × 12 cm) 
8/14/2015 · Roost Trail, Grafton Notch State Park, Newry, Maine · ≈ 6 × 5″ (14 × 12 cm) 
8/4/2009 · Near Nashoba Hospital, Ayer, Massachusetts 
8/6/2013 · Dunstable Rural Land Trust, Dunstable, Massachusetts · ≈ 5 × 6″ (13 × 16 cm) 
7/21/2010 · Nashua River Rail Trail, Ayer, Massachusetts · ≈ 12 × 13″ (29 × 33 cm) 
8/3/2012 · Bemis Rd Conservation Area, Pepperell, Massachusetts · ≈ 9 × 6″ (23 × 15 cm) 
8/12/2017 · Bates Land and Blackman Land, Groton Conservation Trust, Groton, Massachusetts · ≈ 6 × 6″ (15 × 14 cm) 
8/2/2015 · Mt. Watatic, Ashby area, Massachusetts · ≈ 7 × 4½″ (18 × 12 cm) 
8/4/2006 · Moss Glen Falls, Vermont 
8/3/2012 · Bemis Rd Conservation Area, Pepperell, Massachusetts · ≈ 9 × 6″ (22 × 14 cm) 
8/6/2013 · Dunstable Rural Land Trust, Dunstable, Massachusetts · ≈ 6 × 5″ (15 × 13 cm) 
8/2/2015 · Mt. Watatic, Ashby area, Massachusetts · ≈ 7 × 4½″ (18 × 12 cm) 
Young plants. · 6/22/2010 · Nashua River Rail Trail, Ayer, Massachusetts · ≈ 14 × 12″ (36 × 29 cm) 
8/15/2021 · Bass Falls Preserve, Alna, Maine · ≈ 5 × 3½″ (13 × 9 cm) 
8/13/2012 · Squannacook River Wildlife Management Area, Groton, Shirley, & Townsend, Massachusetts · ≈ 6 × 4″ (15 × 10 cm) 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
| Subclass | Asteridae | A large class that encompasses asters |
| Order | Asterales | Flowering plants with a central disk flower and surrounding petals, like daisies |
| Family | Asteraceae | The aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers |
| Genus | Eutrochium | From Greek eu, “well,” and troche, “wheel-like,” for the whorled leaves |
| Species | maculatum | Spotted, referring to purple splotches on the stems of leaves or on petals |
Eutrochium maculatum description by Thomas H. Kent, not updated.
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