Polycnemum arvense
Sp. Pl. 1: 35. 1753.
Common names: Soft needleleaf
Introduced
Stems procumbent or erect, branches spirally twisted, to 10 (–50) cm, glabrous to densely pubescent. Leaves green, 3–8 (–12) × 1 mm, base somewhat clasping, hyaline, not bristly, apex softly spine-tipped. Bracts: distalmost at least 3 times perianth length. Bracteoles ca. equaling perianth length. Seeds 1–1.5 mm. 2n = 18.
Phenology: Flowering summer–fall.
Habitat: Sandy soils
Elevation: 0-200 m
Distribution
Introduced; B.C., c, s Europe to e Russia
Discussion
Once considered weedy, this species has been collected rarely in recent years.
Selected References
None.
Lower Taxa
None.
... more about "Polycnemum arvense"
spine-tipped +
slippery +
clasping +
hyaline +
not bristly +
rigid +
leaflike +
absent +
1;5 +
monomorphic +
connate +
dimorphic +
absent +
twisted +
Soft needleleaf +
3 times perianth length +
coiled +
curved +
developing +
annular +
large +
storage +
common +
white +
clustered +
bisexual +
mature +
true +
simple +
alternate +
green +
1 cm10 mm <br />0.01 m <br /> (?) +
connate +
attached +
campylotropous +
imbricate +
absent +
inconspicuous +
accrescent +
membranous +
equaling +
white +
fleshy +
copious +
absent +
absent +
Sp. Pl. +
1753 +
fusiform +
thickened +
scurfy +
inflated +
black +
vertical +
flattened +
membranous +
equaling +
Introduced +
cylindric +
stiff +
flattened +
absent +
stellate +
procumbent +
erect +
silvery +
not fleshy +
2-branched +
filiform +
lacking +
reduced;small +
fleshy +
1;3 +
prickly +
variable +
indistinct +
shiny +
verrucate +
Polycnemum arvense +
Polycnemum +
species +
annual +