Polygonella gracilis

Meisner in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 80. 1856.

Common names: Slender wireweed
Endemic
Basionym: Polygonum gracile Nuttall Gen. N. Amer. Pl. 1: 255. 1818,
Treatment appears in FNA Volume 5. Treatment on page 537. Mentioned on page 536.

Herbs, annual, dioecious, 8–16 dm. Stems erect, simple or branched proximally and distally, glabrous. Leaves mostly fugaceous; ocrea margins not ciliate; blade filiform to broadly spatulate or, rarely, obovate, (9–) 19–39 (–65) × 0.8–5 (–8) mm, base attenuate, margins not hyaline, apex obtuse, glabrous. Inflorescences (13–) 20–40 (–70) mm; ocreola encircling rachis, only the base adnate to rachis, apex acute. Pedicels spreading in anthesis, sharply reflexed in fruit, 0.1–0.3 mm, as long as subtending ocreola. Flowers functionally unisexual; filaments dimorphic; anthers deep red; styles and stigmas less than 0.1 mm in anthesis. Staminate flowers: outer tepals loosely appressed in anthesis and fruit, white, elliptic, 1.1–2 mm in anthesis, margins entire; inner tepals loosely appressed in anthesis and fruit, white, elliptic, 1–2 mm in anthesis, margins entire. Pistillate flowers: outer tepals loosely appressed in anthesis, usually spreading in fruit, white to pink, often drying red and streaked or dotted orange or brown, elliptic to oblong, 0.8–1.4 mm in anthesis, margins entire or obscurely erose; inner tepals loosely appressed in anthesis and fruit, white to pink, often drying yellow, broadly elliptic to ovate, 1.8–3.6 mm in flower, margins entire or obscurely erose. Achenes included or exserted, reddish-brown to yellowbrown, (2–) 3-gonous, 2–3.4 × 1–1.4 mm, shiny, smooth. 2n = 22, 24.


Phenology: Flowering Aug–Nov.
Habitat: Pinelands, sandhills, sandy roadsides
Elevation: 0-60 m

Distribution

V5 1097-distribution-map.gif

Ala., Fla., Ga., Miss., N.C., S.C.

Discussion

Selected References

None.

Lower Taxa

None.

"/2" is not declared as a valid unit of measurement for this property.

... more about "Polygonella gracilis"
winged +  and wingless +
reddish-brown;yellowbrown +
0.2 cm2 mm <br />0.002 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
exserted +  and included +
(2-)3-gonous +
1mm;1.4mm +
elliptic +  and ovate or round +
acute;obtuse +
Craig C. Freeman +
Meisner in A. P. de Candolle and A. L. P. P. de Candolle +
attenuate +
Polygonum gracile +
3.9 cm39 mm <br />0.039 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1.9 cm19 mm <br />0.019 m <br /> (3.9 cm39 mm <br />0.039 m <br />) +
obovate;,;filiform;broadly spatulate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
foliaceous +  and perfoliate +
scale-like +
just below the soil surface or and above the soil surface +  and spreading +
Slender wireweed +
Ala. +, Fla. +, Ga. +, Miss. +, N.C. +  and S.C. +
0-60 m +
curved +  and straight +
free +  and distinct +
pistillate +  and staminate +
disarticulating +  and solid +
decumbent to erect +  and prostrate +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
Pinelands, sandhills, sandy roadsides +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
broadly elliptic +  and ovate +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
nonmembranous +
fugaceous +
erose +  and entire +
not hyaline +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
swollen +
partly +  and foliaceous +
disintegrating +
deciduous +  and persistent +
cylindric +
coriaceous +  and chartaceous +
3 +  and 5 +
5 +, 1 +  and 2 +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
anatropous +, , +  and orthotropous +
reflexed;spreading +
accrescent +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
spreading;erect +
yellowish;greenish;yellowish;greenish;red;pink;white +
campanulate +
nonaccrescent +
fleshy +, indurate +  and membranous +
Flowering Aug–Nov. +
(2-)3(-4)-carpellate +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
slender;stout +
horned +  and toothed +
branched +  and simple +
prostrate +  and decumbent +
penicillate +, fimbriate +  and capitate +
0 cm0 mm <br />0 m <br /> (?) +  and 0.01 cm0.1 mm <br />1.0e-4 m <br /> (?) +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
distinct +
0 cm0 mm <br />0 m <br /> (?) +  and 0.01 cm0.1 mm <br />1.0e-4 m <br /> (?) +
spreading;erect +
Polygonella gracilis +
Polygonella +
species +
transitional +  and petaloid +
distinct +
lobed +  and laciniate +
coriaceous +
persistent +
membranous +
pubescent +  and glabrous +