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.

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

V5 1162-distribution-map.gif

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 +