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New York Ironweed

Vernonia noveboracensis (L.) Willd.

Comprehensive Description

provided by North American Flora
Vernonia harperi Gleason, Bull. N. Y. Bot. Gard 4:221. 1906.
Stems stout, erect, divaricately branched above, 1 m. tall or more, puberulent; leaf-blades
thin, spreading or ascending, lanceolate, 12-18 cm. long, 1.5-3 cm. wide, acuminate, sharply
dentate, narrowed below into short petioles, scabrous above, especially near the margin,
pubescent beneath; inflorescence very large, 3 dm. acrosss, lax, open, irregular; heads with
55 flowers or more; involucre broadly campanulate, 7-9 mm. high; scales green with purple
margin, closely and regularly imbricate, appressed and arachnoid-ciliate at the triangular-ovate
base, not resinous, gradually tapering into long, erect awns; achenes minutely pubescent on
the ribs, resinous in the furrows, 3.5-4 mm. long; pappus dull-purple, the bristles 6 mm.,
the scales 0.6-0.7 mm. long.
Type locality: Coffee County, Georgia. Distribution: Georgia.
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bibliographic citation
Per Axel, Rydberg. 1922. CARDUALES; AMBROSIACEAE, CARDUACEAE. North American flora. vol 33(1). New York Botanical Garden, New York, NY
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Comprehensive Description

provided by North American Flora
Vernonia noveboracensis (L.) Michx. Fl. Bor. Am. 2: 95. 1803
Serratula noveboracensis L. Sp. PI. 818. 1753.
Serratula praealta L. Sp. PI. 818. 1753.
Behen noveboracense Hill, Hort. Kew. 68. 1768.
Behen praealtum Hill. Hort. Kew. 68. 1768.
Serratula caroliniana Mill. Gard. Diet. ed. 8. Serratula no. 7. 1768.
Chrysocoma totnentosa Walt. Fl. Car. 196. 1788.
Vernonia praealta Michx. Fl. Bor. Am. 2: 95. 1803.
Vernonia totnentosa Ell. Bot. S. C. & Ga. 2: 288. 1821.
Vernonia Rugeliana Shuttlew.; A. Gray, PI. Wright. 1: 82. 1852.
Cacalia noveboracensis Kuntze, Rev. Gen. 324. 1891.
Vernonia noveboracensis totnentosa Britton; Porter & Britton, Mem. Torrey Club 5: 311. 1894.
Stems erect, 10-20 dm. tall, glabrous or thinly pubescent; leaf -blades lanceolate, 10-18 cm. long, 1.5-4 cm. wide, acuminate, sharply serrate to nearly entire, narrowed below, sessile or short-petioled, glabrous or scabrellate above, puberulent or thinly tomentose beneath, especially on the veins; inflorescence flattened, loose, 1-3 dm. wide; heads 29-47-flowered; involucre campanulate, 6-7 mm. high; scales regularly and closely imbricate, arachnoidciliate, frequently pubescent on the back, usually resinous, the outer subulate with spreading tips, the middle and inner with triangular or ovate purple tips ending in a flexuous filiform appendage 1-5 mm. long; achenes pubescent on the ribs, sparsely resinous in the furrows, 4-4.5 mm. long; pappus purple or rarely tawny-purple, the bristles 6-7 mm. long, the linear scales 0.4-0.8 mm. long.
Type locality: New York.
Distribution: Massachusetts to Ohio, West Virginia, and Mississippi, mostly near the coast.
license
cc-by-nc-sa-3.0
bibliographic citation
Per Axel, Rydberg. 1922. CARDUALES; AMBROSIACEAE, CARDUACEAE. North American flora. vol 33(1). New York Botanical Garden, New York, NY
original
visit source
partner site
North American Flora