Your search found 18 image(s) of involucral bracts of DYCs with ray flowers only (no disc).
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Prickly Lettuce,
Lactuca serriola
Involucres 10-15mm long, 3-5mm broad. Bracts imbricate, per Vascular Flora of the Carolinas.
American Wild Lettuce,
Lactuca canadensis
Orange-yellow flowers extend slightly from urn-shaped involucral cylinders, per Forest Plants of the Southeast and Their Wildlife Uses.
Field Sowthistle,
Sonchus arvensis var. glabrescens
Heads 30-50mm across in flower. Phyllaries and peduncles glabrous, per Weakley's Flora (2015).
Prickly Sowthistle,
Sonchus asper
Involucres 10-13mm long, 8-14mm broad, bracts lanceolate, per Vascular Flora of the Carolinas.
Annual Sowthistle,
Sonchus oleraceus
Involucres 8-13mm long, 6-14mm broad; bracts rarely glandular, per Vascular Flora of the Carolinas.
Mouse-ear Hawkweed,
Pilosella officinarum
Involucres 7-12mm long, clothed with black trichomes and stipitate glands, per Vascular Flora of the Carolinas.
Field Hawkweed,
Pilosella caespitosa
Stem & involucres have conspicuous black-tipped glandular hairs, per Wildflowers of the Southern Mountains.
Rattlesnake Hawkweed,
Hieracium venosum
Peduncles usually stipitate-glandular. Bracts acute, about 1mm wide, per Vascular Flora of the Carolinas.
Hairy Hawkweed,
Hieracium gronovii
Involucres 6-8mm long, 3-5mm broad, usually stipitate-glandular, per Vascular Flora of the Carolinas.
Asiatic Hawksbeard,
Youngia japonica
Involucres 5-6mm long, 1.5-2.5mm broad; inner bracts linear, outer very short, per Vascular Flora of the Carolinas.
Hairy Cat's-ear,
Hypochaeris radicata
Involucral bracts imbricate, in several series, per Vascular Flora of the Carolinas.
Hairy Cat's-ear,
Hypochaeris radicata
Phyllaries narrowly lanceolate, unequal, margins scarious, green to darkened, per Flora of North America.
Vegetable Oyster,
Tragopogon dubius
Rays pale yellow, obviously shorter than the longest phyllaries, per Weakley's Flora.
Mountain Dwarf-dandelion,
Krigia montana
In Krigia, the involucral bracts are in 1 series, per Vascular Flora of the Carolinas.
Virginia Dwarf-dandelion,
Krigia virginica
Krigia's involucral bracts are in a single series (vs. 2 in Taraxacum), per Wildflowers of the Southern Mountains.
Carolina False-dandelion,
Pyrrhopappus carolinianus
Inner bracts in 1 series, outer bracts shorter & in several series, per Vascular Flora of the Carolinas.
Common Dandelion,
Taraxacum officinale
Outer involucral bracts are reflexed and about as long as inner bracts, per Wildflowers of Tennessee.