Tripleurospermum maritimum subsp. phaeocephalum

(Ruprecht) Hämet-Ahti

Acta Bot. Fenn. 75: 9. 1967.

Common names: Seashore or wild chamomile matricaire à capitules brunâtres
Basionyms: Matricaria inodora var. phaeocephala Ruprecht Fl. Samojed. Cisural., 42. 1845
Synonyms: Matricaria ambigua (Ledebour) Krylov Matricaria maritima subsp. phaeocephala (Ruprecht) Rauschert Matricaria maritima var. phaeocephala (Ruprecht) Rauschert Tripleurospermum hookeri (Ruprecht) Pobedimova Tripleurospermum phaeocephalum
Treatment appears in FNA Volume 19. Treatment on page 551. Mentioned on page 549, 550.

Phyllaries broadly triangular, scarious margins blackish brown, 0.4–1 mm wide. Cypselae: resin-gland lengths usually little more than twice widths. 2n = 18.


Phenology: Flowering Jul–Oct.
Habitat: Low Arctic seashores and beaches (near high tide strand line), moist to moderately well-drained areas, gravel, sand, moss
Elevation: 0–50 m

Distribution

V19-959-distribution-map.gif

Greenland, Man., N.W.T., Nunavut, Ont., Que., Yukon, Alaska, arctic Eurasia

Discussion

Subspecies phaeocephalum occurs along the low Arctic shore (both continental and insular) from Alaska to Quebec; it does not penetrate north into the Canadian Arctic Archipelago; it does not reach Labrador; it is present in Greenland. If treated as a species, the name T. hookeri Schultz-Bipontinus has priority (N. N. Tzvelev 2002b).

Selected References

None.

Lower Taxa

None.

not tailed +  and obtuse +
scarious +
indeterminate +  and determinate +
Luc Brouillet +
(Ruprecht) Hämet-Ahti +
decurrent +
Matricaria inodora var. phaeocephala +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
compound +  and simple +
lobed;oblong +
Seashore or wild chamomile +  and matricaire à capitules brunâtres +
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 +
Greenland +, Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +  and arctic Eurasia +
0–50 m +
glabrous +  and hairy +
tuberculate +  and rugose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Low Arctic seashores and beaches (near high tide strand line), moist to moderately well-drained areas, gravel, sand, moss +
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 +
blackish brown +
0.4mm +  and 1mm +
2-carpellate +
persistent +
Flowering Jul–Oct. +
28 +  and 60 +
Acta Bot. Fenn. +
bearing subulate enations +, hairy +  and bristly +
convex;conic +
separated +  and contiguous +
3 +  and 5 +
exalbuminous +
1 +  and 5 +
appendaged +  and truncate +
papillate +
Matricaria ambigua +, Matricaria maritima subsp. phaeocephala +, Matricaria maritima var. phaeocephala +, Tripleurospermum hookeri +  and Tripleurospermum phaeocephalum +
Tripleurospermum maritimum subsp. phaeocephalum +
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 +