Atriplex covillei
Atriplex amnicola
Coville's orach
swamp saltbush
terete, sparsely scurfy when young.
petiole to 1/2 as long as blade (becoming subsessile distally);
blade green or finally stramineous, (10–)20–50 × 6–30 mm, firm, base abruptly acute to narrowly cuneate, apex acute to attenuate, sparsely scurfy.
short petiolate;
blade elliptic to narrowly oblong or narrowly hastate with short divaricate basal lobes, 10–25 mm, margin entire or remotely dentate, apex obtuse to acute.
in sessile glomerules in distal axils, often mixed with pistillate ones, staminate calyx deeply 5-cleft;
lobes obtuse, not appendaged.
in compact glomerules 5 mm thick, forming terminal spikes.
with calyx of (1–)3(–5) hyaline sepals.
in axillary clusters and forming short, dense terminal spikes.
dark reddish brown, 1–1.5 mm.
circular.
bracteoles sessile or stipitate, 6–12 × 4–7 mm, margin mostly 3-lobed, with elongate terminal lobe triangular to lanceolate, 2 short rounded lobes at base or sides merely rounded at base, united to beyond middle.
bracteoles somewhat rhombic to semicircular, biconvex, 4–6 mm wide, with a short hard turbinate base, thick and hard throughout or with a herbaceous margin, lacking appendages.
Atriplex covillei
Atriplex amnicola
Endolepis covillei was treated within the synonymy of Atriplex phyllostegia (Torrey) S. Watson by H. M. Hall and F. E. Clements (1923).
H. C. Stutz et al. (1993) placed Atriplex covillei within Endolepis, based in large part on the presence of a perianth subtending the pistil within the fruiting bracteoles and on the lack of Kranz anatomy in the leaves. The pattern of venation is, nevertheless, very similar to that in species with Kranz anatomy. The presence of perianth scales in the pistillate flowers of A. covillei has been regarded as evidence of relationship with A. suckleyi. Despite placement of these taxa within Endolepis by Stutz et al. Atriplex covillei is possibly more closely allied to the morphologically similar and partially sympatric A. phyllostegia than it is to strongly dissimilar and the distantly disjunct A. suckleyi. Stutz and his associates placed great emphasis on the presence of reduced perianth segments subtending the pistil within the fruiting bracteoles of A. covillei. Calyces per se, otherwise known only in A. suckleyi and A. pleiantha, probably have arisen independently. Their presence does not necessarily indicate a close relationship. Stutz et al. pointed to other differences aside from the calyx of the pistillate flowers, and it is apparent that the two entities can stand as distinct species. To segregate A. covillei within a separate genus and to ally it with a species to which its relationships are obscure at best, stretches logic beyond reason.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
This is a singular, large, mostly dioecious shrub well established on the beach at Malibu, California. It produces abundant, hard, rhombic fruiting bracteoles. In its native western Australia, it occurs in coastal regions and inland along creeks and the outer margins of salt lakes.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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