Arctotis

Linnaeus

Sp. Pl. 2: 922. 1753.

,

Gen. Pl. ed. 5, 394. 1754.

Common names: African-daisy
Etymology: Greek arktos, brown bear, and ous, otos, ear, perhaps alluding to shape of pappus scales
Treatment appears in FNA Volume 19. Treatment on page 198. Mentioned on page 34, 48, 195.
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 TaxonIllustrator 
FNA19 P13 Gazania linearis.jpegGazania linearis
Arctotheca calendula
Arctotis stoechadifolia
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey

Annuals or perennials [subshrubs], [5–] 10–100 cm (hirsute to arachnose or woolly, sometimes glandular as well). Stems erect [decumbent]. Leaves basal and/or cauline; petiolate or sessile; blades mostly spatulate to oblanceolate, margins entire, sinuate-dentate, or pinnately lobed, abaxial faces tomentose to sparsely arachnose. Involucres hemispheric to campanulate, 10–25 mm diam. Phyllaries in 3–6+ series, distinct, outer linear to oblong, inner ovate to elliptic, margins ± scarious. Receptacles flat, alveolate (pit margins often ciliate), epaleate. Ray-florets pistillate, fertile (staminodes often present); corollas white, cream, yellow, orange, pink, purple, violet, or blue (sometimes dark abaxially), laminae 4-veined, 3-toothed. Disc-florets usually bisexual and fertile, sometimes functionally staminate; corollas yellow or brown to violet or purple. Cypselae ovoid to obovoid, abaxial faces ± rounded, 3–5-ribbed or winged (wings sometimes toothed and inflexed into 2 longitudinal grooves), adaxial faces flattened, apices sometimes forming callous borders, faces (smooth or transversely rugose) glabrous or pilose to sericeous; pappi usually present, persistent, usually of 5–8 ovate to oblong scales in 2 series, sometimes coroniform, sometimes none. x = 9.

Distribution

Introduced; s Africa, cultivated and/or elsewhere

Discussion

Species ca. 60 (2 in the flora).

Selected References

None.

Key

1 Cypselae ± ovoid, 1.3–1.5 mm, glabrous; pappi 0 or coroniform Arctotis fastuosa
1 Cypselae ± obovoid, 2–3 mm, sericeous (hairs from bases) and tomentulose (on faces); pappi of 5–8 hyaline scales 0.5–4 mm Arctotis stoechadifolia
... more about "Arctotis"
winged +  and 3-5-ribbed +
tomentose +  and sparsely arachnose +
obtuse +  and acute +
rounded;acute +
scarious +
less ovate +  and lanceolate +
indeterminate +  and determinate +
Alison McKenzie Mahoney +
Linnaeus +
decurrent +
compound +  and simple +
mostly spatulate;oblanceolate +
African-daisy +
actinomorphic +
brown +  and violet or purple +
ovoid +  and obovoid +
fertile +  and bisexual +
s Africa +  and cultivated and/or elsewhere +
Greek arktos, brown bear, and ous, otos, ear, perhaps alluding to shape of pappus scales +
pilose +  and sericeous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
indeterminate +
heterogamous +
each +  and sessile +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
hemispheric;campanulate +
3-toothed +
sessile +  and petiolate +
cauline +  and basal +
lanceolate +  and deltate +
lobed +  and sinuate-dentate +
linear +  and oblong +
2-carpellate +
persistent +
coroniform +
Sp. Pl. +  and Gen. Pl. ed. +
1753 +  and 1754 +
bearing subulate enations +, hairy +  and bristly +
5 +  and 8 +
ovate +  and oblong +
exalbuminous +
appendaged +  and truncate +
cylindric +  and dilated +
Compositae +
Arctotis +
Asteraceae tribe Arctotideae +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
perennial +  and annual +
10 cm100 mm <br />0.1 m <br /> (100 cm1,000 mm <br />1 m <br />) +
tree +, vine +, shrub +  and subshrub +