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FNA | Family List | FNA Vol. 4 | Chenopodiaceae | Suaeda

25b. Suaeda Forsskål ex J. F. Gmelin sect. Brezia (Moquin-Tandon) Volkens in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam. 79[III,1a]: 80. 1893.

Brezia Moquin-Tandon in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 13(2): 167. 1849; Suaeda sect. Heterosperma Iljin

Herbs or subshrubs, annual or perennial, glabrous. Leaves sessile, fleshy, cross sections of fresh leaves ± uniformly green when seen at 10× magnification. Inflorescences glomes, each glome in axis of one leaflike bract; bracteoles subtending glomes without marginal hairs. Flowers bisexual or sometimes unisexual; perianth irregular or zygomorphic, sometimes appearing ± actinomorphic, globose to wider than long; perianth segments connate proximally (sometimes forming fleshy disk), succulent or thin, abaxially flat or rounded, sometimes distally hooded, and/or with abaxial appendages (transverse proximal wings, keels, and/or distal horns), apex obtuse to acute; ovary ovoid, transversely ellipsoid, or pyriform; stigmas 2-5, inserted on attenuated apex of ovary, linear, smooth or papillate. Seeds horizontal, strongly dimorphic in some species and individuals; lenticular with seed coat black, blackish brown, or blackish red, shiny, and easily removable from pericarp; or flat to discoid and coiled with seed coat brown, dull, and not easily removed from pericarp.

Species ca. 40 (6 in the flora): worldwide.

1 Perianth segments thin to abaxially rounded, without appendages   2 Suaeda maritima
+ Perianth segments abaxially rounded, one or more segments with abaxial appendages (transverse proximal wings, keels, and/or distal horns)   (2)
2 (1) Perianth segments with one or more segments transversely winged proximally and/or horned distally   (3)
+ Perianth segments not horned or winged   (4)
3 (2) Glomes 3-7-flowered; bracts usually broadest proximal to middle and thin- margined at base; branches usually ascending   3 Suaeda calceoliformis
+ Glomes 1-3-flowered; bracts usually broadest at ± middle, not thin-margined at base; branches usually spreading   4 Suaeda occidentalis
4 (2) Leaf blades linear-lanceolate, usually not narrowed basally; glomes usually 3-5- flowered; Pacific coast   5 Suaeda esteroa
+ Leaf blades linear, narrowed basally; glomes usually 1-3-flowered; Atlantic coast   (5)
5 (4) Flowers usually crowded in compound spikes; perianth 1-2.5 mm diam.; len- ticular seeds 1-1.8 mm diam   6 Suaeda linearis
+ Flowers usually distributed throughout plant; perianth 2-4 mm diam.; lenticu- lar seeds 1.5-2.3 mm diam   7 Suaeda rolandii


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