Polygonum sawatchense subsp. sawatchense

Endemic
Synonyms: Polygonum douglasii subsp. johnstonii Polygonum douglasii var. johnstonii Munz Polygonum exile Coolidge Polygonum triandrum
Treatment appears in FNA Volume 5. Treatment on page 568.
Revision as of 09:10, 30 July 2020 by imported>Volume Importer
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Stems green to brownish, usually branched from base, 4–50 cm, glabrous. Leaves basal leaves caducous or persistent, distal leaves abruptly reduced to bracts, rarely much longer than flowers; ocrea glabrous; blade linear-lanceolate to narrowly oblong or oblanceolate, 15–45 × 2–8 (–12) mm, margins usually revolute, smooth. Inflorescences axillary or axillary and terminal, long, open, racemes, 5–15 cm; cymes (1–) 2–4-flowered. Pedicels 1–4 mm. Flowers closed; perianth (2.5–) 3–3.5 mm; tube 25–40% of perianth length; tepals greenish or reddish with white or pink margins, oblong; midveins greenish or brown, unbranched or with few branches at base; stamens 3–8. Achenes ovate or elliptic, 2.5–3 mm.


Phenology: Flowering Jun–Aug.
Habitat: Dry meadows, pastures, sagebrush and forests on sandy, gravelly, or rocky substrates
Elevation: 800-3500 m

Distribution

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Alta., Sask., Ariz., Calif., Colo., Idaho, Mont., Nebr., Nev., N.Mex., N.Dak., S.Dak., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.

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

reticulate +, tubercled +  and smooth +
exserted +  and included +
dull +  and shiny +
elliptic +  and ovate +
pink +  and purple +
elliptic +  and oblong +
rounded;obtuse;mucronate;acute +
Mihai Costea +, François J. Tardif +  and Harold R. Hinds† +
persistent +  and caducous +
not stipelike +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
linear-lanceolate;narrowly oblong or oblanceolate +
coriaceous +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
foliaceous +  and perfoliate +
scale-like +
just below the soil surface or and above the soil surface +  and spreading +
(1-)2-4-flowered +
rarely much longer +
Alta. +, Sask. +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
800-3500 m +
subequal +
persistent +
adnate +, free +  and distinct +
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 +
Dry meadows, pastures, sagebrush and forests on sandy, gravelly, or rocky substrates +
elongate +  and spikelike +
nonmembranous +
articulated +
distributed +
deciduous +
pink +  and white +
not rugulose +
papillose-denticulate +, flat +  and revolute +
with few branches +  and unbranched +
brown +  and greenish +
swollen +
silvery +, white +  and hyaline +
disintegrating +
deciduous +  and persistent +
papillose-scabridulous +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
coriaceous +  and membranous +
somewhat larger +
anatropous +, , +  and orthotropous +
accrescent +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
spreading;erect +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
greenish white;pink +
campanulate +  and urceolate +
nonaccrescent +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
fleshy +, indurate +  and membranous +
not +  and articulated +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering Jun–Aug. +
(2-)3(-4)-carpellate +
Bull. Torrey Bot. Club +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
papillose-scabridulous +  and smooth +
slender;stout +
woody +  and fibrous +
3 +  and 8 +
green +  and brownish +
zigzagged +  and straight +
papillose-scabridulous +
4-gonous +
4 cm40 mm <br />0.04 m <br /> (50 cm500 mm <br />0.5 m <br />) +
2 +  and 3 +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
connate +  and distinct +
spreading;erect +
Polygonum douglasii subsp. johnstonii +, Polygonum douglasii var. johnstonii +, Polygonum exile +  and Polygonum triandrum +
Polygonum sawatchense subsp. sawatchense +
Polygonum sawatchense +
subspecies +
petaloid +  and sepaloid +
overlapping +
reddish +  and greenish +
connate +  and distinct +
coriaceous +
persistent +
membranous +
pubescent +  and glabrous +
heterophyllous +  and homophyllous +