3.
Suaeda calceoliformis
(Hooker) Moquin-Tandon, Chenop. Monogr. Enum. 128. 1840.
Horned sea-blite, Pursh's seepweed
Chenopodium calceoliforme
Hooker, Fl. Bor.-Amer. 2: 126. 1838;
Suaeda americana
(Persoon) Fernald;
S. depressa
(Pursh) S. Watson var.
erecta
S. Watson;
S. erecta
(S. Watson) A. Nelson
Herbs,
annual, prostrate to erect, green to dark red, 0.5-8(-10) dm, glaucous.
Stems
decumbent to erect, green to dark red, usually striped, simple or branched; branches decumbent, ascending, or spreading.
Leaves
often tightly ascending, sometimes ± spreading; blade linear-lanceolate, adaxial surface flat, (5-)10-40 × 0.2-15 mm, usually widest proximal to middle, apex acute to apiculate.
Glomes
usually crowded in 1-6 cm compound spikes, 3-5(-7)-flowered; bracts subtending branches leaflike, often slightly broader than leaves, bracts subtending glome similar in shape to leaves, 2-12 × 0.8-1.5 mm, broadest proximal to middle, thin-margined basally.
Flowers
bisexual; perianth zygomorphic or irregular (1 or 3 segments usually larger), 1-4 mm diam.; perianth segments transversely winged proximally (continuously in disk or interrupted), rounded and keeled abaxially and/or horned or hooded distally; stigmas usually 2.
Seeds
dimorphic; lenticular, 0.8-1.7 mm diam., with seed coat black, shiny; or flat, 1-1.5 mm diam., with seed coat brown, dull.
2
n
= 36.
Flowering summer-fall. Saline or alkaline wetland soils, including disturbed areas and reservoir margins, also along salted roadsides; 0-2400 m; Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon; Alaska, Ariz., Calif., Colo., Conn., Idaho, Ill., Ind., Iowa, Kans., Maine, Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.Dak., Okla., Oreg., R.I., S.Dak., Tex., Utah, Wash., Wis., Wyo.; Mexico.
The name
Suaeda depressa
has been misapplied to this species (J. McNeill et al. 1977). In the northeastern part of its range,
S. calceoliformis
was long known as
S. americana
, but the two were found to be conspecific (I. J. Bassett and C. W. Crompton 1978).
Suaeda calceoliformis
can easily be confused with
S. occidentalis
, with which it is sympatric in the Great Basin; see comments under
S. occidentalis
. Plants of the annual Mexican seepweed,
S.
mexicana
(Standley) Standley also are similar to
S. calceoliformis
, but are more or less shiny, yellowish or light brown, and have opposite leaves at the base and alternate ones distally.
Suaeda mexicana
has been reported once (in 1895) from El Paso County, Texas, but no specimens have been located to substantiate the report.
