Anthemis

Linnaeus

Sp. Pl. 2: 893. 1753.

,

Gen. Pl. ed. 5, 381. 1754.

Common names: Chamomile
Etymology: Greek anthemon, flower
Treatment appears in FNA Volume 19. Treatment on page 537. Mentioned on page 14, 487, 547, 548.

Annuals (biennials) [perennials, subshrubs], mostly 5–90 cm (often aromatic). Stems 1–5+, erect to decumbent, usually branched, strigillose or strigoso-sericeous to villous (hairs medifixed), glabrescent [glabrous or sericeous to lanate]. Leaves mostly cauline; alternate; petiolate or sessile; blades ± obovate to spatulate, 1–3-pinnately lobed, ultimate margins dentate to lobed, faces glabrous or strigillose to villous [glabrous or sericeous to lanate]. Heads radiate [discoid], borne singly or in lax, corymbiform arrays (peduncles sometimes clavate and/or curved in fruit). Involucres obconic to hemispheric or broader, 5–13 [–20] mm diam. Phyllaries persistent, mostly 21–35+ in 3–5 series, distinct, deltate to lanceolate, oblong, or elliptic, unequal, margins and apices (hyaline and colorless or brownish [black]) scarious. Receptacles hemispheric to narrowly conic, paleate (wholly or only distally); paleae ± flat, scarious to indurate (subulate or elliptic to obovate with mucronate to acuminate-spinose tips). Ray-florets [0 or 2–] 5–20 [–30+], pistillate and fertile or styliferous and sterile; corollas usually white, rarely yellow or pink, laminae mostly oblong (tubes sometimes hairy). Disc-florets (60–) 100–300+, bisexual, fertile; corollas usually yellow, rarely pink, tubes ± cylindric (usually proximally dilated, ± spongy in fruit, sometimes hairy, not saccate), throats funnelform, lobes 5, ± triangular (abaxially minutely crested). Cypselae obovoid to obconic or turbinate (circular or 4-angled in cross-section), ribs usually 9–10 (0) and smooth or tuberculate, faces glabrous (pericarps with myxogenic cells); pappi 0 or coroniform. x = 9.

Distribution

Introduced; Europe, sw Asia, n, e Africa, in s Africa, Pacific Islands (New Zealand), Australia

Discussion

Species 175 (2 in the flora).

Anthemis secundiramea Bivona-Bernardi, a European species, was collected once in Virginia; it differs from A. arvensis in having peduncles to 8 cm and ribs on cypselae ± tuberculate.

Key

1 Stems branched mostly proximally; receptacles paleate throughout, paleae lanceolate to oblanceolate, weakly navicular (± carinate, tips acuminate-spinose); cypselae: ribs smooth or weakly tuberculate Anthemis arvensis
1 Stems branched mostly distally or ± throughout; receptacles paleate distally, paleae subulate to acerose; cypselae: ribs ± tuberculate Anthemis cotula

"broader" is not a number.

... more about "Anthemis"
not tailed +  and obtuse +
scarious +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Linda E. Watson +
Linnaeus +
decurrent +
compound +  and simple +
lobed;less obovate;spatulate +
Chamomile +
zygomorphic +, actinomorphic +  and (3-)5-merous +
pink +, yellow +  and white +
winged +  and monomorphic +
obovoid +  and obconic or turbinate +
fertile +  and bisexual +
fertile +  and bisexual +
Europe +, sw Asia +, n +, e Africa +, in s Africa +, Pacific Islands (New Zealand) +  and Australia +
Greek anthemon, flower +
glabrous +, strigillose +  and villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
in lax , corymbiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
obconic;hemispheric +
sessile +  and petiolate +
triangular +
entire +  and dentate +
2-carpellate +
scarious +  and indurate +
persistent +
coroniform +
21 +  and 35 +
Sp. Pl. +  and Gen. Pl. ed. +
1753 +  and 1754 +
styliferous +  and pistillate +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
hemispheric;narrowly conic +
oberprieler2001a +
9 +  and 10 +
tuberculate +  and smooth +
exalbuminous +
erect +  and decumbent +
1 +  and 5 +
appendaged +  and truncate +
papillate +
Compositae +
Anthemis +
Asteraceae tribe Anthemideae +
cylindric +
dentate +  and lobed +
5 cm50 mm <br />0.05 m <br /> (90 cm900 mm <br />0.9 m <br />) +
shrub +  and subshrub +