Atriplex gardneri var. bonnevillensis

(C. A. Hanson) S. L. Welsh

Great Basin Naturalist 44: 190. 1984.

Common names: Bonneville saltbush
EndemicConservation concern
Basionym: Atriplex bonnevillensis C. A. Hanson Stud. Syst. Bot. 1: 2. 1962
Treatment appears in FNA Volume 4. Treatment on page 374. Mentioned on page 372, 379.

Subshrubs or shrubs, dioecious or sparingly monoecious, mainly 2–8 dm, as wide or wider. Stems ascending. Leaves tardily deciduous, alternate, sessile or subsessile; blade linear to oblanceolate or obovate-spatulate, 7–40 × 2–9 mm, 2–9 times longer than wide. Staminate flowers tan to brown or rarely yellow, in glomerules 2–3 mm thick, in terminal or axillary spikes or spicate panicles 1–9 cm. Pistillate flowers in spicate panicles 8–25 cm. Fruiting bracteoles sessile or on stipes to 4 mm, body basically ovoid and bearing 4 lateral wings or rows of flattened tubercles, 5–8 × 3–9 mm, apex acuminate, 1–4 mm, tubercles lanceolate, sometimes vestigial, rarely absent, to 3 mm high. Seeds 1.5 mm wide.


Phenology: Flowering summer–fall.
Habitat: Greasewood and saltbush communities in valley bottoms and playas
Elevation: 1500-1600 m

Discussion

Of conservation concern.

The Bonneville saltbush is apparently a partially stabilized introgressant involving Atriplex gardneri var. falcata and A. canescens. The habitat is intermediate between that occupied by the parental taxa. There is evidence that the introgression is continuing in some populations at least. The plants are herein placed within A. gardneri, with which they are most similar morphologically.

Selected References

None.

Lower Taxa

None.
wingless +  and winged +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Stanley L. Welsh +
(C. A. Hanson) S. L. Welsh +
slippery +
aromatic +
cuneate +
Atriplex bonnevillensis +
0.7 cm7 mm <br />0.007 m <br /> (4 cm40 mm <br />0.04 m <br />) +
linear +  and oblanceolate or obovate-spatulate +
2mm;9mm +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
3-5-parted +
Bonneville saltbush +
Nev. +  and Utah. +
1500-1600 m +
pistillate +  and staminate +
tan +  and brown or rarely yellow +
unisexual +  and bisexual +
not +  and connate +
enlarged +
2mm +  and 3mm +
Greasewood and saltbush communities in valley bottoms and playas +
bladderlike +
terminal +  and axillary +
subsessile +  and sessile +
deciduous +
not winged +  and winged +
toothed +  and lobed +
stipitate +  and sessile +
inferior +, half-inferior +  and superior +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
8 cm80 mm <br />0.08 m <br /> (25 cm250 mm <br />0.25 m <br />) +
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 +
Brown (?) +  and Tan (?) +
flattened +
1.5 cm15 mm <br />0.015 m <br /> (?) +
Endemic +  and Conservation concern +
cylindric +
3 (?) +  and 5 (?) +
opposite +  and alternate +
succulent +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Atriplex nuttallii subsp. gardneri +  and Atriplex nuttallii var. gardneri +
Atriplex gardneri var. bonnevillensis +
Atriplex gardneri +
variety +
spicate +  and naked +
spicate +  and naked +
tuberculate +
lanceolate +  and flattened +
dicotyledonous +
perennial +  and annual +
shrub +  and subshrub +
monoecious +  and dioecious +
wider +  and wide +