familyPolygonaceae
subfamilyPolygonaceae subfam. Polygonoideae
genusPolygonum
sectionPolygonum sect. Polygonum
speciesPolygonum oxyspermum
subspeciesPolygonum oxyspermum subsp. oxyspermum
Polygonum oxyspermum subsp. oxyspermum
Introduced
Synonyms: Polygonum acadiense Fernald
Treatment appears in FNA Volume 5. Treatment on page 554.
Leaves: ocrea prominently veined, (6.5–) 8–12 mm, distal part disintegrating, veins persistent, brown; blade green, narrowly elliptic to lanceolate, 5–8 times as long as wide. Flowers: perianth 3.5–5.5 mm; tepals slightly overlapping, green with pink margins, oblong to obovate, apex flat, flared. Achenes with apex exserted 1–2.5 mm from perianth, 4.1–5.5 (–6.5) mm, 1.5–2.6 times as long as wide, ± smooth.
Phenology: Flowering Jul–Oct.
Habitat: Coastal beaches, dunes, and shores
Elevation: 0-10 m
Distribution
Introduced; N.S., Europe
Discussion
Selected References
None.
Lower Taxa
None.
"/2" is not declared as a valid unit of measurement for this property.
... more about "Polygonum oxyspermum subsp. oxyspermum"
tubercled +
black;brown;black;brown;yellow-green +
1.5-2.6 +
glabrous +
smooth;roughened +
homocarpic +
4.1mm;5.5mm +
whitish yellow +
dehiscing +
exserted +
flared +
distal +
not stipelike +
articulated +
green +
5-8 +
narrowly elliptic;lanceolate +
coriaceous +
connate +
absent +
2;10 +
scale-like +
connate +
free +
adjacent +
aerial +
woody +
2-7-flowered +
distributed +
hyaline +
disintegrating +
deciduous +
curved +
nuclear +
abundant +
brown +
glabrous +
semi-open +
closed +
1;7 +
bisexual +
aerial +
fistulose +
homocarpic +
capitate +
cluster +
axillary +
spikelike +
length +
true +
enclosed +
tubular +
nonmembranous +
pinnate +
alternate +
deciduous +
cauline +
petaloid +
pink +
slightly larger +
swollen +
veined +
disintegrating +
absent +
glabrous +
chartaceous +
2-lobed +
somewhat larger +
equaling +
articulate +
erect;spreading +
absent +
accrescent +
awnless +
cluster +
spreading;erect +
absent +
unwinged +
greenish white;pink +
persistent +
glabrous +
nonaccrescent +
articulated +
articulated +
absent +
(2-)3(-4)-carpellate +
pruinose +
cylindric +
Index Seminum (Dorpat) +
1824 +
tuberous +
conspicuous +
ringlike +
longitudinal +
Introduced +
recurved +
absent +
8-16-ribbed +
straight +
scandent +
prostrate +
glabrous +
papillous-scabridulous +
peltate +
capitate +
foliaceous +
absent +
chartaceous +
spreading +
spreading;erect +
solid +
Polygonum oxyspermum subsp. oxyspermum +
Polygonum oxyspermum +
subspecies +
absent +
monomorphic +
entire +
overlapping +
green +
dimorphic +
connate +
coriaceous +
persistent +
membranous +
glandular-punctate +
developing +
raised +
fine +
branched +
brown +
persistent +
homophyllous +
not compact +
annual +
heterocarpic +
not cushionlike +