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Florida Bluestem,
Andropogon floridanus
Inflorescence loosely subcorymbose, w pairs of silvery-white/creamy racemes, per Manual of the Grasses of the United States (Hitchcock & Chase, 1950).
Garden Star-of-Bethlehem,
Ornithogalum umbellatum
Inflorescence a corymb, which elongates into a raceme as fruits develop, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Drooping Star-of-Bethlehem,
Ornithogalum nutans
Inflorescence racemose and cylindrical (vs. O. umbellatum corymbose and rounded or flat-topped), per Weakley's Flora (2022).
Carolina Tassel-rue,
Trautvetteria caroliniensis
Flowers 0.5" wide, with numerous white stamens in a corymbiform cluster, per Wildflowers of the Southern Mountains (Smith, 1998).
Multiflora Rose,
Rosa multiflora
Flowers numerous in corymb, 1.5-4cm in diameter, per Flora of China.
Japanese Spiraea,
Spiraea japonica
Inflorescence a compound corymb, flat-topped or rounded, broader than long, per Weakley's Flora.
Virginia Spiraea,
Spiraea virginiana
Inflorescence a compound corymb, flat-topped or rounded, broader than long, per Weakley's Flora (2023).
Taiwanese Redtip,
Photinia serratifolia
Flowers borne in a 4-7" wide, terminal, corymbose panicle, per Manual of Woody Landscape Plants (Dirr, 1975+).
European Mountain-ash,
Sorbus aucuparia ssp. aucuparia
Flowers white, 1/3" across, malodorous, borne in 3-5" flat-topped corymbs, per Manual of Woody Landscape Plants (Dirr, 1975+).
Red Chokeberry,
Aronia arbutifolia
Flowers in compound corymbs, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Black Chokeberry,
Aronia melanocarpa
Flowers in compound corymbs. Petals 5-8mm long, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Fire Cherry,
Prunus pensylvanica
Inflorescences umbellate fascicles or corymbs. Pedicels glabrous, per Flora of North America.
Eastern Flowering Spurge,
Euphorbia corollata
Flowering June-Sept, inflorescences appearing corymbose and densely flowered, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Chalk Maple,
Acer leucoderme
Flowers in terminal corymbs, pedicels filiform, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Trident Maple,
Acer buergerianum
Flowers [thus fruit] borne in downy umbel-like corymbs; fruit set oft heavy, per Manual of Woody Landscape Plants (Dirr, 1975+).
American Wild Lettuce,
Lactuca canadensis
Heads in ± corymbiform to paniculiform arrays, per Flora of North America.
Whiplash Hawkweed,
Pilosella flagellaris
Heads 2-4+ in ± umbelliform to corymbiform arrays. Corollas yellow, per Flora of North America.
Rattlesnake Hawkweed,
Hieracium venosum
Inflorescence a diverse, many-headed, flat-topped corymb, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Leafy Hawkweed,
Hieracium paniculatum
Inflorescence a diffuse panicle of many-headed corymbs, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Blue Ridge Ragwort,
Packera millefolium
Flower heads arranged in open, corymbiform arrays. Peduncles glabrous, per Flora of North America.
Small's Ragwort,
Packera anonyma
Usually 20-100 heads in a corymb-like inflorescence, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Robbins' Ragwort,
Packera schweinitziana
Heads 8-20+ in loose, corymbiform arrays, per Flora of North America.
Sandhill Thistle,
Cirsium repandum
Heads 1-5, rarely more, corymbose. Involucres 2.5-3.3cm long, arachnose, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Tall Ironweed,
Vernonia gigantea
13-30 flwrs per head (vs. 30-55 in V. noveboracensis), in terminal corymbs, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Vanilla-leaf,
Trilisa odoratissima
Capitulescence corymbose, lateral branches equally or overtopping central ones, per Weakley's Flora (2022).
Sandhill Chaffhead,
Carphephorus bellidifolius
Corymb usually 1/3 or more the length of the stem, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Sandhill Chaffhead,
Carphephorus bellidifolius
Heads in open, loose, usually corymbiform, sometimes paniculiform, arrays, per Flora of North America.
White Boneset,
Eupatorium album
Corymb branches pubescent. Involucres cylindric; bracts long-acuminate, apices and margins white, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Bay Boneset,
Eupatorium paludicola
Flowers borne in dense, flat-topped corymbs, per Forest Plants of the Southeast and Their Wildlife Uses (Miller & Miller, 2005).
Wedgeleaf Thoroughwort,
Eupatorium glaucescens
Corymb 1-4dm broad, the branches densely pubescent, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Recurved Thoroughwort,
Eupatorium recurvans
Corymb 0.5-3.5dm broad, the branches pubescent, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Hyssopleaf Boneset,
Eupatorium hyssopifolium
Flowers white to cream-colored, in a broad flat-topped corymb, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Common Roundleaf Boneset,
Eupatorium rotundifolium
Heads numerous, in a flat-topped corymb with opposite, hairy branches, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Inland Roundleaf Eupatorium,
Eupatorium pubescens
Flower heads in corymbiform arrays, per Flora of North America.
Britton's Upland Boneset,
Eupatorium sessilifolium var. brittonianum
Heads small, densely clustered in a flat-topped corymb, per Weakley's Flora.
Boneset,
Eupatorium perfoliatum
Heads in a flat-topped corymb with opposite, soft-hairy branches, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Common White Snakeroot,
Ageratina altissima
Inflorescence a flat or rounded corymb-like structure, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Pink Thoroughwort,
Fleischmannia incarnata
Corymb loosely branched. Involucres cylindric to campanulate, very fragrant, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Mistflower,
Conoclinium coelestinum
Disk flowers blue-purple; heads discoid, numerous in terminal corymbs, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Common Camphorweed,
Pluchea camphorata
Heads pedunculate, in dense corymbs, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Pussytoes,
Antennaria howellii ssp. neodioica
Heads 4-8(-13) in corymbiform arrays, per Flora of North America.
Eastern Doll's-daisy,
Boltonia asteroides var. glastifolia
Numerous flower heads, borne in an intricately branched leafy corymb, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Large-leaf Aster,
Eurybia macrophylla
Inflorescence a flat-topped corymb, rarely with fewer than 17 heads. Rays 12-20, white to lavender, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
White Wood-aster,
Eurybia divaricata
The inflorescence is corymbiform; flowers have 5-10 white rays, per Wildflowers of the Southern Mountains (Smith, 1998).
Whorled Nodding-aster,
Oclemena acuminata
Flower heads in an open corymb, with ~ 15 white rays & a yellow or red disk, per Wildflowers of the Southern Mountains (Smith, 1998).
Low Showy Aster,
Eurybia spectabilis
Heads usually in open, corymbiform arrays, seldom borne singly, branches ascending, stout, per Flora of North America.
Creeping Aster,
Eurybia surculosa
Flowers in a corymbiform cluster, each with 15-30 violet rays, per Wildflowers of the Southern Mountains (Smith, 1998).
Alexander's Rock Aster,
Eurybia avita
Inflorescence corymbiform, ray florets 8-15(-25), per Weakley's Flora (2022).
Northern Tall Flat-top White Aster,
Doellingeria umbellata var. umbellata
The inflorescence is not an umbel but a flattish corymbiform cluster, per Wildflowers of the Southern Mountains (Smith, 1998).
Blue Ridge Goldenrod,
Solidago spithamaea
Flower heads in compact corymbs; stem leaves > 1cm wide, upper not clasping, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Southeastern Stiff Goldenrod,
Solidago jacksonii
Inflorescence corymbose [rounded], per Weakley's Flora (2012).
Prairie Goldenrod,
Solidago ptarmicoides
Inflorescence corymbose (rounded). Rays white; more disk flowers than ray flowers, per Weakley's Flora (2023).
Riddell's Goldenrod,
Solidago riddellii
Inflorescence corymbose (rounded), per Weakley's Flora (2012).
Marsh Flattop Goldenrod,
Euthamia weakleyi
Inflorescences flat-topped corymbs; heads with 10-20 flowers, per Weakley's Flora (2015).
Narrowhead Goldentop,
Euthamia leptocephala
Flower heads small, numerous, in a flat-topped corymb, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).
Nuttall's Rayless-goldenrod,
Bigelowia nuttallii
Heads discoid (in glomerate clusters) in flat-topped corymbiform arrays, per Flora of North America.
Camphorweed,
Heterotheca subaxillaris
Heads numerous, in corymbs, often diffuse and appearing paniculate, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
White Crownbeard,
Verbesina virginica var. virginica
Heads in compact corymbs, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
Scentless Chamomile,
Tripleurospermum inodorum
Heads (1)10-200+, in corymbiform arrays of solitary heads at branch ends, per Flora of North America.
Ageratum,
Ageratum houstonianum
Flower heads in dense to open, cymiform to corymbiform arrays, per Flora of North America.