Atriplex canescens var. gigantea

S. L. Welsh & Stutz

Great Basin Naturalist 44: 189. 1984.

Common names: Lynndyl fourwing
Endemic
Treatment appears in FNA Volume 4. Treatment on page 380. Mentioned on page 379.

Plants mainly 10–20 dm, not especially armed, commonly layering. Pistillate flowers borne in panicles 5–40 cm. Fruiting bracteoles on stipes 18, body with 4 prominent, dentate to entire wings extending length of bract, united throughout, mainly 15–25 mm wide and about as long, apex toothed, surface of wings and body smooth or reticulate. Seeds 1.5–2.5 mm wide. 2n = 18.


Phenology: Flowering summer–fall.
Habitat: Active sand dunes
Elevation: 1400-1600 m

Discussion

Atriplex canescens var. gigantea occurs with scurfpea (Psoralidium lanceolatum), ricegrass (Stipa hymenoides), and other dune plants. Occasional plants with very large bracts occur as far south as El Paso County, Texas. The chromosomal status for Atriplex canescens var. gigantea is unknown, however, and is evidently unusual in the species in being diploid. The population in Juab County, Texas, occurs in active sand dunes and accommodates the change in depth of sand by rooting (i.e., layering) along the buried portions of the stem (H. C. Stutz et al. 1975). Actual plant length below the sand surface is often much greater than that showing above the surface.

Atriplex canescens var. gigantea is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.

"united" is not a number.

wingless +  and winged +
Stanley L. Welsh +
S. L. Welsh & Stutz +
slippery +
aromatic +
Calligonum canescens +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
linear +  and oblanceolate oblong or obovate +
3mm;8mm +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
3-5-parted +
Lynndyl fourwing +
1400-1600 m +
unisexual +  and bisexual +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
not +  and connate +
enlarged +
Active sand dunes +
bladderlike +
terminal +  and axillary +
nearly +  and sessile +
persistent +
not winged +  and winged +
toothed +  and lobed +
stipitate +  and sessile +
inferior +, half-inferior +  and superior +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
(1-)3-5-lobed +
papery +  and chartaceous +
Flowering summer–fall. +
Great Basin Naturalist +
pointing +  and ascending +
sublateral +  and superior +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
verrucate +  and striate +
flattened +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
cylindric +
3 (?) +  and 5 (?) +
opposite +  and alternate +
succulent +
0.1 cm1 mm <br />0.001 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
reticulate +  and smooth +
verrucate +
Atriplex nuttallii +
Atriplex canescens var. gigantea +
Atriplex canescens +
variety +
spicate +  and naked +
spicate +  and naked +
tuberculate +
dicotyledonous +
layering +  and armed +
perennial +  and annual +
monoecious +  and dioecious +
wider +  and wide +
dentate +  and entire +
dentate to entire +