Atriplex graciliflora

M. E. Jones

Proc. Cali f. Acad. Sci., ser. 2, 5: 717. 1895.

Common names: Blue Valley orach
IllustratedEndemic
Synonyms: Obione graciliflora (M. E. Jones) Ulbrich
Treatment appears in FNA Volume 4. Treatment on page 346. Mentioned on page 326, 347.

Herbs, branching from base, mainly 1–3 dm. Stems often suffused with red-purple, terete, sparingly farinose when young. Leaves mainly alternate, numerous; petiole 2–12 (–16) mm; blade cordate-ovate to orbicular, subreniform, cordate, or deltoid, (5–) 8–20 (–25) mm and about as wide or wider, base truncate to cordate (or attenuate when young), apex rounded to obtuse or acute. Staminate flowers in loose, deciduous, terminal panicles overtopping foliage, rachis and branches filiform, glomerules often beadlike in alternate position along rachis, perianth 5-lobed. Pistillate flowers axillary. Fruiting bracteoles on stipes 2–6 mm, samaralike, suborbicular, oblong or cordate in outline, winged, compressed, 6–16 mm wide, margins 2–4 times as wide as body, wings undulate or entire, surfaces smooth. Seeds white, 3 mm wide, dull.


Phenology: Flowering summer.
Habitat: Saltbush, mat-atriplex, seepweed, greasewood, rabbitbrush, and tamarix communities on saline, often salt encrusted and semibarren substrates derived from Mancos Shale, Tropic Shale, Entrada, and other fine-textured formations
Elevation: 1100-2000 m

Discussion

Atriplex graciliflora is unique among our indigenous atriplices in having samaralike, entire fruiting bracteoles. When the bracteoles are considered along with the slender, terminal, staminate panicles of alternating beadlike glomerules, the species is unmatched. Its relationship is apparently with A. saccaria, which has undergone considerable morphologic radiation within the Four Corners region.

Selected References

None.

Lower Taxa

None.
... more about "Atriplex graciliflora"
Stanley L. Welsh +
M. E. Jones +
slippery +
aromatic +
truncate +  and cordate +
Graciliflorae +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
cordate-ovate +  and orbicular subreniform cordate or deltoid +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
wider;wide +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
0 +  and 1/2 +
cuneate +  and ovate or obovate +
3-5-parted +
Blue Valley orach +
Colo. +  and Utah. +
1100-2000 m +
pistillate +  and staminate +
rarely +  and lacking +
unisexual +  and bisexual +
not +  and connate +
enlarged +
Saltbush, mat-atriplex, seepweed, greasewood, rabbitbrush, and tamarix communities on saline, often salt encrusted and semibarren substrates derived from Mancos Shale, Tropic Shale, Entrada, and other fine-textured formations +
bladderlike +
terminal +  and axillary +
deciduous +  and persistent +
not winged +  and winged +
entire +  and serrate +
lobed +  and serrate-dentate +
2-4 times as wide as body +
compressed +
0.6 cm6 mm <br />0.006 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
inferior +, half-inferior +  and superior +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
suborbiculate +
persistent +  and deciduous +
papery +  and chartaceous +
1.2 cm12 mm <br />0.012 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering summer. +
Proc. Cali f. Acad. Sci., ser. +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
verrucate +  and striate +
flattened +
3 cm30 mm <br />0.03 m <br /> (?) +
Illustrated +  and Endemic +
cylindric +
3 (?) +  and 5 (?) +
opposite +  and alternate +
suffused with red-purple +
succulent +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Obione graciliflora +
Atriplex graciliflora +
Atriplex subsect. Graciliflorae +
species +
dicotyledonous +
0.6 cm6 mm <br />0.006 m <br /> (?) +  and 1.6 cm16 mm <br />0.016 m <br /> (?) +
undulate +