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Asteraceae
Helianthus

not marked as a favorite taxon Helianthus porteri (A. Gray) Pruski. Common name: Confederate Daisy. Phenology: Aug-Sep. Habitat: In shallow soils over granite on low-elevation granite domes or flatrocks. Distribution: A Piedmont endemic: nw. SC south to GA and ec. AL

Glossary (beta!)

Origin/Endemic status: Endemic

Taxonomy Comments: The species has often been treated in Viguiera; see Pruski (1998) and Schilling et al. (1998) for discussion of the reasons for treating this species in Helianthus. It is well-established at two sites in NC, on Rocky Face Mountain (Alexander County, NC) and Mitchell Mill Flatrock (Wake County, NC), where it was introduced with soil blocks of Diamorpha smallii as part of an ecological experiment (Mellinger 1972; McCormick & Platt 1964); it is now aggressively weedy at these sites.

Synonymy ⓘ: = FNA21, K4; = n/a — RAB; = Viguiera porteri (A.Gray) Blake — S, SE1. Basionym: Rudbeckia porteri A.Gray 1849

Links to other floras: = Helianthus porteri - FNA21

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Heliophily ⓘ: 9

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image #1 of Helianthus porteri© Scott Ward | Original Image ⭷
image #2 of Helianthus porteri© Alan Cressler: helianthus porteri, davidson-arabia mountain nature preserve, dekalb county, georgia 2 by Alan Cressler source
image #3 of Helianthus porteri© Alan Cressler: helianthus porteri, stone mountain, stone mountain park, dekalb county, georgia 11 by Alan Cressler source
image #4 of Helianthus porteri© Scott Ward | Original Image ⭷
image #5 of Helianthus porteri© Alan Cressler: Helianthus porteri, Stone Mountain, Stone Mountain Park, Dekalb County, Georgia 1 by Alan Cressler source
image #6 of Helianthus porteri© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #7 of Helianthus porteri© Scott Ward | Original Image ⭷
image #8 of Helianthus porteri© Scott Ward | Original Image ⭷
image #9 of Helianthus porteri© Alan M. Cressler | Original Image ⭷
image #10 of Helianthus porteri© Alan Cressler: Helianthus porteri, Stone Mountain, Stone Mountain Park, DeKalb County, Georgia 8 by Alan Cressler source
image #11 of Helianthus porteri© Alan Cressler: Helianthus porteri, Stone Mountain, Stone Mountain Park, DeKalb County, Georgia 11 by Alan Cressler source | Original Image ⭷
image #12 of Helianthus porteri© Alan Cressler: Helianthus porteri, Stone Mountain, Stone Mountain Park, Dekalb County, Georgia 3 by Alan Cressler source | Original Image ⭷
image #13 of Helianthus porteri© Alan M. Cressler | Original Image ⭷
image #14 of Helianthus porteri© Alan Cressler: Helianthus porteri, Stone Mountain, Stone Mountian Park, DeKalb County, Georgia 3 by Alan Cressler source | Original Image ⭷
image #15 of Helianthus porteri© Alan Cressler: Helianthus porteri, Stone Mountain, Stone Mountain Park, DeKalb County, Georgia 1 by Alan Cressler source
image #16 of Helianthus porteri© Alan Cressler: helianthus porteri, stone mountain, stone mountain park, dekalb county, georgia 8 by Alan Cressler source

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Horticultural Information

NCBG trait

Intro: Erect, often colonial annual of shallow soils over granite on low-elevation granite domes or flatrocks.

Stems: Stems rough-hairy.

Leaves: Leaves opposite below and alternate above, short-petiolate to sessile, linear and tapering at both ends, to 4 1/2 in. long, with fringed margins toward the base and rough-hairy and gland-dotted above.

Inforescence:

Flowers: Composite flowers (heads) in small terminal clusters; heads 1 1/2-2 in. wide, consisting of 7-8 yellow ray florets encircling a center disk of yellow tubular florets. Overlapping, narrow, pointed bracts surround the base of each head.

Fruits: Fruit an achene.

Comments:

Height: 1 1/2-3 ft.

plant sale text:

bloom table text:

description: Erect, often colonial annual of shallow soils over granite on low-elevation granite domes or flatrocks.

stems: Stems rough-hairy.

leaves: Leaves opposite below and alternate above, short-petiolate to sessile, linear and tapering at both ends, to 4 1/2 in. long, with fringed margins toward the base and rough-hairy and gland-dotted above.

inflorescence:

flowers: Composite flowers (heads) in small terminal clusters; heads 1 1/2-2 in. wide, consisting of 7-8 yellow ray florets encircling a center disk of yellow tubular florets. Overlapping, narrow, pointed bracts surround the base of each head.

fruits: Fruit an achene.

comments:

cultural notes:

germination code:

native range:



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