Polygonum parryi

Greene

Bull. Torrey Bot. Club 8: 99. 1881.

Common names: Parry’s or prickly knotweed
Endemic
Treatment appears in FNA Volume 5. Treatment on page 563. Mentioned on page 561.
Revision as of 09:09, 30 July 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Herbs, compact, often cushionlike. Stems erect, green-brown, simple or branched from base, not wiry, 2–5 (–8) cm, glabrous. Leaves ± uniformly distributed, dense, not articulated to ocreae, basal leaves ± persistent, distal leaves gradually reduced to bracts; ocrea 2–4 (–5) mm, glabrous, proximal part cylindric, distal part deeply lacerate, disintegrating into white, curled fibers; petiole absent; blade 3-veined, without pleats, linear-lanceolate, subulate, 5–13 (–20) × 0.4–1 mm, margins revolute, smooth, apex spine-tipped. Inflorescences axillary; cymes in most axils, 1-flowered. Pedicels absent. Flowers closed; perianth 1.5–2 (–2.5) mm; tube 6–15% of perianth length; tepals overlapping, usually reddish with white margins, petaloid, oblong, navicular, apex acute; midveins unbranched; stamens 8. Achenes slightly exserted from perianth at maturity, dark-brown, ovate, 1.2–1.6 (–2) mm, faces subequal, shiny, smooth.


Phenology: Flowering May–July.
Habitat: Vernally moist, open, sandy or rocky places
Elevation: 500-2000 m

Discussion

Selected References

None.

Lower Taxa

None.

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

... more about "Polygonum parryi"
reticulate +, tubercled +  and smooth +
black;brown;black;brown;yellow-green +
exserted +  and included +
dull +  and shiny +
3-gonous +, ovate +  and elliptic or lanceolate +
pink +  and purple +
elliptic +  and oblong +
Mihai Costea +, François J. Tardif +  and Harold R. Hinds† +
Greene +
not stipelike +
1.3 cm13 mm <br />0.013 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
subulate;linear-lanceolate +
coriaceous +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
foliaceous +  and perfoliate +
scale-like +
just below the soil surface or and above the soil surface +  and spreading +
Parry’s or prickly knotweed +
Calif. +  and Wash. +
500-2000 m +
subequal +
adnate +, free +  and distinct +
semi-open +  and open +
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 +
Vernally moist, open, sandy or rocky places +
compound +, branched +  and simple +
nonmembranous +
not articulated +
distributed +
deciduous +
not rugulose +
papillose-denticulate +
swollen +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
silvery +, white +  and hyaline +
disintegrating +
deciduous +  and persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
coriaceous +  and membranous +
somewhat larger +
anatropous +, , +  and orthotropous +
erect;spreading or reflexed +
accrescent +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
spreading;erect +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
greenish white;pink +
campanulate +  and urceolate +
nonaccrescent +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
fleshy +, indurate +  and membranous +
not +  and articulated +
Flowering May–July. +
(2-)3(-4)-carpellate +
Bull. Torrey Bot. Club +
papillose-scabridulous +  and smooth +
slender;stout +
woody +  and fibrous +
not wiry +, branched +  and simple +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
green-brown +
zigzagged +  and straight +
papillous-scabridulous +
4-gonous +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
2 +  and 3 +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
connate +  and distinct +
spreading;erect +
Undefined sect. Duravia +  and Polygonum sect. Monticola +
Polygonum parryi +
Polygonum sect. Duravia +
species +
overlapping +
connate +  and distinct +
navicular +  and oblong +
coriaceous +
persistent +
membranous +
pubescent +  and glabrous +
heterophyllous +  and homophyllous +