Arnoglossum atriplicifolium

(Linnaeus) H. Robinson

Phytologia 28: 294. 1974.

Endemic
Basionyms: Cacalia atriplicifolia Linnaeus Sp. Pl. 2: 835. 1753
Synonyms: Cacalia paniculata Rafinesque Conophora atriplicifolia (Linnaeus) Nieuwland Conophora similis (Small) Nieuwland Mesadenia atriplicifolia (Linnaeus) Rafinesque Mesadenia pulverulenta Rafinesque Mesadenia rotundifolia Rafinesque Mesadenia similis Small Senecio atriplicifolius (Linnaeus) Hooker
Treatment appears in FNA Volume 20. Treatment on page 623.

Plants 100–300 cm (rhizomatous). Stems smooth to weakly striate (glaucous). Basal leaves: blades usually ovate or ovate-cordate, to 21 cm (bases truncate or subcordate), margins shallowly lobed or dentate (sinuses smooth). Cauline leaves: (abaxial faces pale green, glaucous) proximal petiolate, ± deltate, margins coarsely dentate; distal petiolate or sessile, smaller. Involucres (7.5–) 8–10 (–10.5) mm. Phyllaries (pale green) oblong, midveins not winged (tips obtuse to acute, sparsely papillate). Corollas white, usually with green, sometimes purple, 8–9.5 (–13) mm. Cypselae fusiform or ellipsoid, 4–5 mm (brown or purplish, 8–10-ribbed); pappi 5–6 (–7) mm (readily falling). 2n = 50, 52, 56.


Phenology: Flowering Jul–Nov.
Habitat: Edges of woods, pastures, roadsides
Elevation: 10–600 m

Distribution

V20-1397-distribution-map.gif

Ala., Ark., Del., Fla., Ga., Ill., Ind., Kans., Ky., Md., Mich., Minn., Miss., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Va., W.Va., Wis.

Discussion

Selected References

None.

Lower Taxa

None.

56 +, 52 +  and 50 +
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
indeterminate +  and determinate +
Loran C. Anderson +
(Linnaeus) H. Robinson +
decurrent +
Cacalia atriplicifolia +
ovate-cordate;ovate +
0 cm0 mm <br />0 m <br /> (21 cm210 mm <br />0.21 m <br />) +
winged;nerved;ribbed +
barbellate +  and smooth +
nerved +  and (4-)10-15-ribbed +
ellipsoid +  and fusiform +
fertile +  and bisexual +
fertile +  and bisexual +
sessile +  and petiolate +
Ala. +, Ark. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Va. +, W.Va. +  and Wis. +
10–600 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Edges of woods, pastures, roadsides +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
1 cm10 mm <br />0.01 m <br /> (1.05 cm10.5 mm <br />0.0105 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
cylindric;turbinate +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
recurved;spreading +
lanceolate +
dentate +  and lobed +
2-carpellate +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
persistent +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Flowering Jul–Nov. +
unequal +  and subequal +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
exalbuminous +
appendaged +  and truncate +
papillate +
Cacalia paniculata +, Conophora atriplicifolia +, Conophora similis +, Mesadenia atriplicifolia +, Mesadenia pulverulenta +, Mesadenia rotundifolia +, Mesadenia similis +  and Senecio atriplicifolius +
Arnoglossum atriplicifolium +
Arnoglossum +
species +
campanulate +
30 cm300 mm <br />0.3 m <br /> (300 cm3,000 mm <br />3 m <br />) +