Chamaemelum

Miller

Gard. Dict. Abr. ed. 4, vol. 1. 1754.

Etymology: Greek chamae- , on the ground, lowly, creeping, and melon, orchard, alluding to common habitat
Treatment appears in FNA Volume 19. Treatment on page 496. Mentioned on page 14, 26, 487.
 TaxonIllustrator 
FNA19 P57 Chamaemelum nobile.jpegChamaemelum nobile
Santolina chamaecyparissus
Picrothamnus desertorum
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
John Myers

Annuals or perennials, 5–20 (–35+) cm, (aromatic). Stems usually 1, erect, ascending, or prostrate, usually branched, glabrous or glabrate, puberulent, or villous to strigoso-sericeous (hairs basifixed). Leaves mostly cauline (at flowering); alternate; petiolate or sessile; blades oblong, ovate, elliptic, or spatulate, 1–3-pinnately lobed (ultimate lobes narrowly spatulate to linear or filiform, apices apiculate), ultimate margins entire, faces glabrous or glabrate, puberulent, or villous to strigoso-sericeous. Heads radiate or discoid, borne singly or in lax corymbiform arrays. Involucres hemispheric or broader, 6–10 mm diam. Phyllaries persistent, 22–45+ in 3–4+ series (sometimes reflexed in fruit), mostly ovate to oblong, unequal, margins and apices (colorless, brownish, or greenish) scarious. Receptacles hemispheric to conic, paleate; paleae weakly navicular to ± flat (medially chartaceous, margins scarious, apices rounded). Ray-florets 0 or 12–21+, pistillate and fertile or styliferous and sterile; corollas white, laminae oblong (often marcescent, reflexed in fruit). Disc-florets 100–200+, bisexual, fertile; corollas yellow, tubes ± cylindric (somewhat dilated, bases saccate, weakly clasping apices of cypselae), throats funnelform, lobes 5, deltate. Cypselae ± obovoid, weakly obcompressed, ribs or nerves (weak): 2 lateral, 1 adaxial, faces finely striate, glabrous (pericarps with myxogenic cells in longitudinal rows, without resin sacs); pappi 0. x = 9.

Distribution

Introduced; s, w Europe, n Africa

Discussion

Species 2 (2 in the flora).

Selected References

None.

Key

1 Annuals; stems erect or ascending, glabrous or puberulent; margins and apices of phyllaries brownish Chamaemelum fuscatum
1 Perennials; stems mostly prostrate (much branched, often forming mats), ± strigoso-sericeous to villous; margins and apices of phyllaries greenish or lacking pigment Chamaemelum nobile

"broader" is not a number.

... more about "Chamaemelum"
not tailed +  and obtuse +
scarious +
indeterminate +  and determinate +
Linda E. Watson +
Miller +
decurrent +
compound +  and simple +
lobed;spatulate;elliptic;spatulate;elliptic;ovate;oblong +
zygomorphic +, actinomorphic +  and (3-)5-merous +
yellow +  and white +
winged +  and monomorphic +
obcompressed +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
s +, w Europe +  and n Africa +
Greek chamae- , on the ground, lowly, creeping, and melon, orchard, alluding to common habitat +
glabrous +, glabrate puberulent or villous +  and strigoso-sericeous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
in lax corymbiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
hemispheric +
sessile +  and petiolate +
deltate +
entire +  and dentate +
adaxial +  and lateral +
2-carpellate +
weakly navicular;more or less flat +
persistent +
22 +  and 45 +
Gard. Dict. Abr. ed. +
styliferous +  and pistillate +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
hemispheric;conic +
adaxial +  and lateral +
exalbuminous +
prostrate +, ascending +  and erect +
appendaged +  and truncate +
papillate +
Compositae +
Chamaemelum +
Asteraceae tribe Anthemideae +
cylindric +
20 cm200 mm <br />0.2 m <br /> (35 cm350 mm <br />0.35 m <br />) +
perennial +  and annual +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
shrub +  and subshrub +