Atriplex oblongifolia

Waldstein & Kitaibel

Descr. Icon. Pl. Hung. 3: 278, plate 211. 1812.

Common names: Oblong-leaf orach
Introduced
Treatment appears in FNA Volume 4. Treatment on page 333. Mentioned on page 324.

Herbs, erect, branching from base, mostly 6–12 dm. Leaves alternate above; petiole 0.5–3 cm; blade green on both sides or distal leaves whitish abaxially, triangular to lance-triangular, (20–) 30–85 × 6–90 mm, base hastate or subcuneate, margin subentire, entire, or irregularly dentate, farinaceous at first, later glabrous. Flowers in terminal or axillary ± paniculate inflorescences 6–25+ cm. Staminate flowers with 5 sepals. Pistillate flowers dimorphic, all bracteolate and lacking sepals. Bracteoles loosely spaced, of 2 sizes; large fruiting bracteoles oval to ovate, 5–6 × 5 mm, with faces lacking appendages, small ones similar in shape, 2 mm and wide. Seeds vertical; of large bracteoles yellowish-brown, 2–3 mm wide, flat, dull; of small bracteoles black, 1.5 mm wide or less, shiny; radicle of brown seeds subbasal to median and antrorse. 2n = 36.


Phenology: Flowering summer.
Habitat: Ruderal
Elevation: 400-1000 m

Distribution

V4 631-distribution-map.gif

Introduced; Alta., B.C., Ont., S.Dak., Europe

Discussion

I. J. Bassett et al. (1983) indicated that Atriplex oblongifolia formed abundant, very fertile hybrids with A. patula in the Botanic Garden at Manchester University. This is a weedy species with facies similar to both A. dioica and A. glabriuscula var. acadiensis. The proximal branches at least are opposite, similar to phases of the nearly allied A. patula, however. It is likewise an introduced ruderal weed of roadsides and other waste places. Its spread in North America awaits documentation. The thin, entire fruiting bracts without appendages are pointed to as diagnostic of this entity from other similar species.

Selected References

None.

Lower Taxa

None.
... more about "Atriplex oblongifolia"
Stanley L. Welsh +
Waldstein & Kitaibel +
slippery +
aromatic +
subcuneate +  and hastate +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3 cm30 mm <br />0.03 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
triangular +  and lance-triangular +
6mm;90mm +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
5mm +  and 6mm +
oval +  and ovate +
5 +  and wide +
3-5-parted +
Oblong-leaf orach +
Alta. +, B.C. +, Ont. +, S.Dak. +  and Europe +
400-1000 m +
tuberculate +  and smooth +
bracteolate +, pistillate +  and staminate +
unisexual +  and bisexual +
not +  and connate +
enlarged +
Ruderal +
bladderlike +
axillary +  and terminal +
6 cm60 mm <br />0.06 m <br /> (25 cm250 mm <br />0.25 m <br />) +
deciduous +  and persistent +
not winged +  and winged +
dentate +  and entire +
glabrous +  and farinaceous +
subentire +
inferior +, half-inferior +  and superior +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
(1-)3-5-lobed +
papery +  and chartaceous +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering summer. +
Descr. Icon. Pl. Hung. +
lateral +, basal +  and inferior +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
verrucate +  and striate +
shiny +  and dull +
flattened +
1.5 cm15 mm <br />0.015 m <br /> (?) +
lacking +  and 5 +
Introduced +
cylindric +
3 (?) +  and 5 (?) +
opposite +  and alternate +
succulent +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Hastatae +
Atriplex oblongifolia +
Atriplex sect. Teutliopsis +
species +
dicotyledonous +
subdioecious +  and monoecious +