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Crested Greenhead Sedge,
Cyperus metzii
3-4 leaflike involucral bracts, horizontal to slightly reflexed, flat, 1-6cm, per Flora of North America.
Tawny Cottongrass,
Eriophorum virginicum
Involucral bracts usually 3, similar to leaf blades, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Rose-of-Sharon,
Hibiscus syriacus
5 triangular calyx lobes and 7-10 linear involucral bracts, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Swamp Rosemallow,
Hibiscus moscheutos
Calyx lobes triangular-lanceolate, densely canescent. Involucral bracts linear, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Queen Anne's Lace,
Daucus carota ssp. carota
Involucral bracts scarious-margined [margin somewhat translucent, not green], per Weakley's Flora.
Queen Anne's Lace,
Daucus carota ssp. carota
Involucral bracts pinnately divided into linear to filiform segments, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
American Queen Anne's Lace,
Daucus pusillus
Involucral bracts not scarious-margined, involucre extending beyond the compound umbel in flower, per Weakley's Flora (2022).
Lion's-foot Rattlesnake-root,
Nabalus serpentaria
Principal (inner) involucral bracts much longer than smaller (outer) ones, per Wildflowers of the Southern Mountains (Smith, 1998).
Hairy Cat's-ear,
Hypochaeris radicata
Involucral bracts imbricate, in several series, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Mountain Dwarf-dandelion,
Krigia montana
In Krigia, the involucral bracts are in 1 series, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Virginia Dwarf-dandelion,
Krigia virginica
Krigia's involucral bracts are in a single series (vs. 2 in Taraxacum), per Wildflowers of the Southern Mountains (Smith, 1998).
Common Dandelion,
Taraxacum officinale
Outer involucral bracts are reflexed and about as long as inner bracts, per Wildflowers of Tennessee (Carman, 2005).
Roundleaf Ragwort,
Packera obovata
Involucral bracts purple-tipped, 0.2" [5mm] long, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Bachelor's Buttons,
Cyanus segetum
The involucral bracts have a narrow, dark, fringed margin, per Wildflowers of the Southern Mountains (Smith, 1998).
Spotted Knapweed,
Centaurea stoebe ssp. micranthos
Outer involucral bracts w pectinate (comb-like), scarious, blackish apices, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Tyrol Knapweed,
Centaurea nigrescens
Involucral bracts with a triangular blackish tip, with a fringe, per Wildflowers in the Field and Forest: Northeastern US (Clemants & Gracie, 2006).
Bull Thistle,
Cirsium vulgare
Involucral bracts narrowly pointed, rigid, not sticky, per Wildflowers in the Field and Forest: Northeastern US (Clemants & Gracie, 2006).
Nodding Thistle,
Carduus nutans
A nodding head with broad, purplish reflexed involucral bracts, per Wildflowers of the Southern Mountains (Smith, 1998).
Plumeless Thistle,
Carduus acanthoides ssp. acanthoides
Involucres arachnose. Outer involucral bracts erect, inner bracts soft, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
New York Ironweed,
Vernonia noveboracensis
It has long, pointed involucral bracts, per All About South Carolina Wildflowers (Midgley, 1999).
Common Elegant Blazing-star,
Liatris elegans var. elegans
Flowers whitish (1-3 per head), within showy, twisting, involucral bracts, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).
Scaly Blazing-star,
Liatris squarrosa var. squarrosa
Involucral bracts leaf-like, reflexed, lanceolate, with acuminate tips, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Savanna Eupatorium,
Eupatorium leucolepis
"leucolepis" = white-scaled, referring to white-haired involucral bracts, per New York Natural Heritage Program.
Tall Thoroughwort,
Eupatorium altissimum
Disc flwrs white to cream-colored. Involucral bracts rounded, overlapping, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Mistflower,
Conoclinium coelestinum
(Pollinator at work) Involucral bracts awl-shaped, purple-tipped, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Climbing Hempweed,
Mikania scandens
Each head has 4 acuminate, nearly smooth, involucral bracts, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Trampweed,
Facelis retusa
Inner involucral bracts w 2 convergent purplish spots below the hyaline apex, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Plantainleaf Pussytoes,
Antennaria plantaginifolia
Female plants have white-tipped involucral bracts with a purplish base, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Robin's Plantain,
Erigeron pulchellus var. pulchellus
Involucral bracts densely pubescent, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Narrowleaf Whitetop Aster,
Sericocarpus linifolius
Involucral bracts whitish with green tips, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
White Arrowleaf Aster,
Symphyotrichum urophyllum
Involucral bracts with green band along midrib for nearly their entire length, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Creeping Aster,
Eurybia surculosa
The involucral bracts are spreading but [unlike Symphyotrichum retroflexum] not recurved, per Wildflowers of the Southern Mountains (Smith, 1998).
Curtis's Aster,
Symphyotrichum retroflexum
Readily recognized by the green, leafy, strongly recurved, involucral bracts, per Wildflowers of the Southern Mountains (Smith, 1998).
Climbing Aster,
Ampelaster carolinianus
Involucral bracts whitish, green with dark green foliaceous apices, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Frost Aster,
Symphyotrichum pilosum var. pilosum
Involucral bracts lanceolate, acuminate, the apex acicular [needle-like], per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Woolly Goldenaster,
Chrysopsis gossypina
More or less densely woolly hairy, except sometime not on involucral bracts, per Guide to the Wildflowers of SC, 1st ed. (Porcher & Rayner, 2001).
Bearsfoot,
Smallanthus uvedalia
Involucral bracts ovate to elliptic, obtuse to acutish, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
White-flowered Leafcup,
Polymnia canadensis
Peduncles villous to stipitate-glandular. Involucral bracts acute to acuminate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Virginia Cup-plant,
Silphium connatum
Involucral bracts of the genus Silphium are wide and usually squarrose, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Starry Rosinweed,
Silphium dentatum
Involucral bracts of the genus Silphium are wide and usually squarrose, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Starry Rosinweed,
Silphium asteriscus var. asteriscus
Involucral bracts in the genus Silphium are wide and usually squarrose, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Starry Rosinweed,
Silphium asteriscus var. asteriscus
Involucral bracts ciliate, glabrous or pubescent on the backs, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Greenheaded Coneflower,
Rudbeckia laciniata var. laciniata
Involucral bracts lanceolate to oblanceolate, essentially glabrous, acute, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Blue Ridge Cutleaf Coneflower,
Rudbeckia laciniata var. humilis
Involucral bracts lanceolate to oblanceolate, essentially glabrous, acute, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Common Three-lobed Coneflower,
Rudbeckia triloba var. triloba
Involucral bracts linear, 5-12mm long, spreading to reflexed, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Woodland Black-eyed Susan,
Rudbeckia hirta var. hirta
Involucral bracts linear to lanceolate, acute, spreading pubescent, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Smooth Coneflower,
Echinacea laevigata
Involucral bracts obscurely in 2 series, acute to acuminate, reflexed, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Narrowleaf Sunflower,
Helianthus angustifolius
Involucral bracts in several series, lanceolate to linear, acuminate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Downy Sunflower,
Helianthus mollis
Involucral bracts lanceolate, acuminate, the tips often reflexed, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Woodland Sunflower,
Helianthus divaricatus
Involucral bracts lanceolate, acuminate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Lanceleaf Coreopsis,
Coreopsis lanceolata
Outer involucral bracts green, lanceolate; inner elliptic to lanceolate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Large-flowered Coreopsis,
Coreopsis grandiflora var. grandiflora
Outer involucral bracts green, lanceolate; inner eliptic to lanceolate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Common Hairy Coreopsis,
Coreopsis pubescens var. pubescens
Calyculi [outer involucral bracts] of lanceolate to lance-linear bractlets, per Flora of North America.
Whorled Coreopsis,
Coreopsis major var. major
Outer involucral bracts oblong or oblanceolate, 2-10mm; inner lanceolate 5-8mm, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Whorled Coreopsis,
Coreopsis major var. rigida
Outer involucral bracts oblong or oblanceolate, 2-10mm; inner lanceolate 5-8mm, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Tall Coreopsis,
Coreopsis tripteris
The inner involucral bracts not yet open, flower heads sealed up like pillboxes.
Tall Coreopsis,
Coreopsis tripteris
Outer involucral bracts linear, 3-6mm long: inner lanceolate, 4-7mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Broadleaf Coreopsis,
Coreopsis latifolia
Outer involucral bracts linear, 4-6mm long: inner lanceolate, 7-8mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Nodding Bur-marigold,
Bidens cernua
Outer involucral bracts leafy, typically surpassing the disk, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Ditch Daisy,
Bidens aristosa
Calyculus bractlets [outer involucral bracts] usually spreading to reflexed, per Flora of North America.