Tripleurospermum maritimum subsp. maritimum

Common names: False chamomile matricaire maritime
Treatment appears in FNA Volume 19. Treatment on page 550. Mentioned on page 548.

Phyllaries oblong or narrowly triangular, scarious margins pale to dark-brown, 0.2–0.4 mm wide. Cypselae: resin-gland lengths often much more than twice widths. 2n = 18, 36.


Phenology: Flowering Jun–Sep.
Habitat: Roadsides, fields, waste places
Elevation: 0–10 m

Distribution

V19-958-distribution-map.gif

Introduced; St. Pierre and Miquelon, N.B., Nfld. and Labr. (Nfld.), N.S., Que., Calif., Maine, Mass., Pa., Europe

Discussion

Specimens examined from inland North America that had been attributed to Tripleurospermum maritimum subsp. maritimum were all T. inodorum. The identity of the plant called T. maritimum in St. Pierre and Miquelon is uncertain; I did not have access to the voucher specimens and some plants so labeled in maritime eastern Canada were in fact T. inodorum. I am uncertain as to whether or not this taxon persists in northeastern North America. Some specimens identified to this taxon, even on the coast, may be T. inodorum individuals that have become multi-stemmed through damage or via other mechanisms, particularly on sand dunes. Such specimens are difficult to classify as annual or perennial if the taproot is not dug out, and the lack of cypselae may prevent positive identification.

Selected References

None.

Lower Taxa

None.

not tailed +  and obtuse +
scarious +
indeterminate +  and determinate +
Luc Brouillet +
(Linnaeus) W. D. J. Koch +
decurrent +
Matricaria maritima +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
compound +  and simple +
lobed;oblong +
False chamomile +  and matricaire maritime +
zygomorphic +, actinomorphic +  and (3-)5-merous +
1.6 cm16 mm <br />0.016 m <br /> (2 cm20 mm <br />0.02 m <br />) +
yellow +  and white +
1 cm10 mm <br />0.01 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
winged +  and monomorphic +
brown +, pale +  and dark blackish +
compressed +  and trigonous +
fertile +  and bisexual +
2.5 cm25 mm <br />0.025 m <br /> (?) +
fertile +  and bisexual +
St. Pierre and Miquelon +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Que. +, Calif. +, Maine +, Mass. +, Pa. +  and Europe +
0–10 m +
glabrous +  and hairy +
tuberculate +  and rugose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Roadsides, fields, waste places +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
hemispheric;patelliform +
sessile +  and petiolate +
cauline +  and basal +
deltate +
entire +  and dentate +
pale +  and dark-brown +
0.2mm +  and 0.4mm +
2-carpellate +
persistent +
Flowering Jun–Sep. +
28 +  and 60 +
Syn. Fl. Germ. Helv. ed. +
bearing subulate enations +, hairy +  and bristly +
convex;conic +
separated +  and contiguous +
3 +  and 5 +
exalbuminous +
1 +  and 5 +
appendaged +  and truncate +
papillate +
Chamomilla maritima +
Tripleurospermum maritimum subsp. maritimum +
Tripleurospermum maritimum +
subspecies +
campanulate +
cylindric +
0.4 cm4 mm <br />0.004 m <br /> (2 cm20 mm <br />0.02 m <br />) +
serrate +  and crenate +
50 cm500 mm <br />0.5 m <br /> (80 cm800 mm <br />0.8 m <br />) +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
shrub +  and subshrub +