Stylophorum diphyllum (Michx.) Nutt.
Yellow wood poppy, celandine poppy
It is not known whether celandine poppies originated in Europe or the southern United States.
Plants: Plants reach 1–1½′ (30–45 cm). Stems and leaves exude a bright yellow-orange sap when cut.
Leaves: This plant has basal leaves, as well as a pair of opposite leaves on the stem, both up to 6 ⨉ 4″ (15 ⨉ 10 cm). Leaves are divided into 3-5 lobes which in turn are further divided, making them bipinnatifid. Leaf surfaces are dark green and hairless, while leaf undersides are pale as a result of fine hairs. Leaf stems (petioles) are up to 4″ (10 cm) long.
Flowers: Each flower has four partially overlapping yellow petals, two sepals (which fall away early after flowering), a knobby stigma, and multiple yellow-orange stamens. They appear in groups of one to four, and are 1¼–2″ (3.2–5.7 cm) around. Flowers May-June.
Fruits: Bristly blue-green ovoid seed pods, divided into four segments, ¾–1″ (1.9–2.5 cm).
Habitats: Dry deciduous woodlands, bases of bluffs, and rocky stream banks.
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Sometimes these are confused. |
Online References:
Discover Life (Good photos)
References:
Clemants, Steven; Gracie, Carol, Wildflowers in the Field and Forest, Oxford University Press, 2006, p. 214
6/15/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 2 × 3″ (5.9 × 8.3 cm) 
6/15/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 5 × 8″ (13 × 19 cm) 
5/16/2014 · Acton Arboretum, Action, Massachusetts · ≈ 10 × 7″ (25 × 16 cm) 
5/22/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 15 × 10″ (39 × 26 cm) 
5/16/2014 · Acton Arboretum, Action, Massachusetts · ≈ 8 × 5″ (19 × 12 cm) 
5/27/2016 · Acton Arboretum, Acton, Massachusetts 
5/14/2012 · Acton Arboretum, Acton, Massachusetts · ≈ 7 × 4½″ (17 × 11 cm) 
5/16/2014 · Acton Arboretum, Action, Massachusetts · ≈ 8 × 5″ (21 × 13 cm) 
4/30/2013 · Acton Arboretum, Acton, Massachusetts · ≈ 8 × 7″ (21 × 17 cm) 
5/27/2016 · Acton Arboretum, Acton, Massachusetts 
4/30/2013 · Acton Arboretum, Acton, Massachusetts · ≈ 6 × 8″ (14 × 20 cm) 
6/15/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 4 × 6″ (10 × 15 cm) 
4/30/2013 · Acton Arboretum, Acton, Massachusetts · ≈ 8 × 7″ (21 × 17 cm) 
5/14/2012 · Acton Arboretum, Acton, Massachusetts · ≈ 1½ × 1′ (52 × 34 cm) 
5/22/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 11 × 7″ (27 × 18 cm) 
6/15/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 4½ × 7″ (11 × 17 cm) 
5/16/2014 · Acton Arboretum, Action, Massachusetts · ≈ 7 × 5″ (18 × 13 cm) 
5/16/2014 · Acton Arboretum, Action, Massachusetts · ≈ 8 × 8″ (21 × 21 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 | Magnoliidae | Includes magnolias, nutmeg, bay laurel, cinnamon, avocado, black pepper, and many others |
| Order | Papaverales | A group that includes buttercups and other poisonous plants |
| Family | Papaveraceae | Poppy family |
| Genus | Stylophorum | From the Greek words stylos, “style,” and phoros, “bearing” with reference to the long columnar style |
| Species | diphyllum | With two leaves or leaflets |
Stylophorum diphyllum description by Thomas H. Kent, not updated.
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