Helianthus porteri
Species of sunflower
From Wikipedia, the free encyclopedia
Helianthus porteri is a species of sunflower known by the common names Porter's sunflower,[2] Stone Mountain daisy[3] and Confederate daisy. The term "daisy" is imprecise because the species is a sunflower (Helianthus) rather than a daisy (Bellis and related genera). Likewise, although the plant grows on Stone Mountain, GA, its range extends well beyond. The connection to the Confederacy is through Stone Mountain which contains a confederate monument, although the connection is tenuous as the species was named before the Civil War in 1849 by Harvard botanist Asa Gray in honor of Thomas Conrad Porter, a Pennsylvanian minister and botanist who collected the plant in Georgia.[4] Gray initially named the plant Rudbeckia porteri,[5] later changed to Helianthus in 1998 by John F. Pruski.[6]
| Porter's sunflower, also known as Stone Mountain or Confederate daisy | |
|---|---|
| |
| Helianthus porteri on Stone Mtn. | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Tribe: | Heliantheae |
| Genus: | Helianthus |
| Species: | H. porteri |
| Binomial name | |
| Helianthus porteri (A.Gray) Pruski 1998 not (A.Gray) Heiser 1978 (1978 name not validly published) | |
| Synonyms[1] | |
| |
The species is native to the southeastern United States, including Alabama and Georgia, but has been introduced to granite outcrop areas in North Carolina as an aggressive weed.[7][8] Helianthus porteri grows on thin soils on and around flat rock granite and gneiss outcrops.[9] It is an annual herb up to 100 cm (40 inches) tall. One plant usually produces 5 or more flower heads, each containing 7 or 8 yellow ray florets surrounding 30 or more yellow disc florets.[10][11]
