Atriplex parishii var. depressa

(Jepson) S. L. Welsh

Rhodora 102: 423. 2001.

Common names: Depressed orach
EndemicConservation concern
Basionym: Atriplex depressa Jepson Pittonia 2: 304. 1892
Treatment appears in FNA Volume 4. Treatment on page 357. Mentioned on page 356.

Stems prostrate to decumbent, white, to 2 dm, usually brittle, glabrous to scaly, grayish scurfy; branches terete. Leaves sometimes opposite, proximalmost usually sessile; blade ovate to cordate, 3–7 mm, margin entire, apex acute, usually densely white scaly. Flowers in axils of opposite, bracteate leaves, pistillate in clusters of 4, these and subtending leaves crowded on branchlets, internodes at anthesis 2 mm. Staminate flowers in small, yellow, axillary glomerules, calyx 4-lobed. Fruiting bracteoles deciduous, ovate (ovate-hastate) or rhombic, 2–3.5 mm, united to near summit, entire or obscurely denticulate, faces tuberculate, mostly white scurfy. Seeds reddish-brown, 1–1.5 mm.


Phenology: Flowering late summer–fall.
Habitat: Alkaline grasslands, often on clay soils
Elevation: 0-200(-300) m

Discussion

Of conservation concern.

Atriplex parishii var. depressa occurs with Distichlis spicata, Frankenia salina, Centromadia pungens, Spergularia macrotheca, and Astragalus tener. This variety was cited in W. L. Jepson (1909–1943, vol. 1) and in L. Abrams and R. S. Ferris (1923–1960, vol. 2) as a synonym of Atriplex parishii but treated in the modern Jepson Manual as a distinct species, where it was separated in the key from A. parishii by having stems merely glabrous to densely scaly near the tips, versus woolly near the tips in A. parishii. The vestiture appears felty, with individual trichomes not usually evident.

Selected References

None.

Lower Taxa

None.

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

broadest +
Stanley L. Welsh +
(Jepson) S. L. Welsh +
slippery +
aromatic +
mostly rounded +  and cordate +
Atriplex depressa +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
ovate +  and cordate +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
3mm;8mm +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
0 +  and 1/2 +
cuneate +  and ovate or obovate +
horizontal +  and ascending +
villous +, scurfy +  and white +
4-lobed +
Depressed orach +
separated +  and imbricate +
0-200(-300) m +
tuberculate +
staminate +  and pistillate +
rarely +  and lacking +
unisexual +  and bisexual +
not +  and connate +
enlarged +
Alkaline grasslands, often on clay soils +
bladderlike +
terminal +  and axillary +
deciduous +  and persistent +
not winged +  and winged +
gray +  and white +
lobed +  and serrate-dentate +
subsessile +, sessile +  and monomorphic +
hastate +  and ovate +
inferior +, half-inferior +  and superior +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
(1-)3-5-lobed +
papery +  and chartaceous +
Flowering late summer–fall. +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
verrucate +  and striate +
flattened +
tuberculate +
Endemic +  and Conservation concern +
cylindric +
3 (?) +  and 5 (?) +
opposite +  and alternate +
grayish +  and white +
prostrate +  and decumbent +
Scurfy (?) +, Glabrous (?) +  and Scaly (?) +
succulent +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
denticulate +, entire +, rhombic +  and ovate +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
verrucate +
Obione parishii +
Atriplex parishii var. depressa +
Atriplex parishii +
variety +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
lobed +, compressed +, rhombic +  and ovate +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
dicotyledonous +
spreading;prostrate +