Biology:Symphyotrichum chapmanii

Short description: Species of flowering plant in the family Asteraceae native to Alabama and Florida, US

Symphyotrichum chapmanii
Symphyotrichum chapmanii, Apalachicola National Forest, Florida
Conservation status
Imperiled (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Tribe:	Astereae
Subtribe:	Symphyotrichinae
Genus:	Symphyotrichum
Subgenus:	Symphyotrichum subg. Chapmaniana
Species:	S. chapmanii
Binomial name
Symphyotrichum chapmanii (Torr. & A.Gray) Semple & Brouillet
Native distribution
Synonyms
Aster chapmanii Torr. & A.Gray Eurybia chapmanii (Torr. & A.Gray) G.L.Nesom Heleastrum chapmanii (Torr. & A.Gray) Shinners

Symphyotrichum chapmanii (formerly Aster chapmanii and Eurybia chapmanii) is a species of flowering plant in the family Asteraceae native to the Apalachicola River drainage basin of Alabama and Florida. Commonly known as savanna aster, it is a perennial, herbaceous plant that may reach 30 to 80 centimeters (1 to 2 ¹⁄₂ feet) tall. Its flowers have purple to blue-lavender ray florets and pale yellow disk florets. It is a wetland species and is of conservation concern. It may be extirpated in Alabama.

Description

Savanna aster is a perennial, herbaceous plant that grows from a cespitose root system with rhizomes. It typically reaches heights 30–80 cm (12–31 in) on one to three hairless stems. It has cylinder-bell shaped involucres with green, purple-tipped phyllaries in 4–6 rows on its involucres. It blooms September–December with flower heads that have 8–23 purple to pale bluish-purple ray florets 10–20 mm (0.4–0.8 in) long surrounding 47–57 pale yellow disk florets.

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  Flower head from bottom

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  Bracts, involucre, and phyllaries

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  Phyllary detail

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  Flower head from top

References

• Flora of North America Editorial Committee, ed. (2006), "Symphyotrichum chapmanii", Flora of North America North of Mexico (FNA), 20, New York and Oxford, http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250067629, retrieved 14 July 2021 
• "Eurybia chapmanii Chapman's Aster". Arlington, Virginia. 2 July 2021. https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.149486/Eurybia_chapmanii. 
• "Eurybia chapmanii". Natural Resources Conservation Service PLANTS Database. USDA. 2014. https://plants.usda.gov/core/profile?symbol=EUCH11. 
• POWO (2019). "Symphyotrichum chapmanii (Torr. & A.Gray) Semple & Brouillet" (in en). Royal Botanic Gardens, Kew. http://www.plantsoftheworldonline.org/taxon/1157228-2. 
• "Symphyotrichum subg. Chapmaniani Chapman's Aster". Ontario. 28 January 2014. https://uwaterloo.ca/astereae-lab/research/asters/symphyotrichum/symphyotrichum-subg-chapmaniani-0. 

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