28. Treatment on page 590. Mentioned on page 584. Plants medium-sized to large, in loose mats. Stems creeping, sympodial, stoloniferous; secondary stems
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unlobed, or lateral lobes greatly reduced or absent, terminal lobe usually large, margins usually regularly or irregularly dentate to serrate, sometimes denticulate
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rhomboid, nearly always strengthened with conspicuous spiral fibrils, small to large, round to elliptic and sometimes ringed pores occur along commissures or
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2 or occasionally with 3–6 adaxial cells near base, usually not markedly larger than abaxial cells, often excurrent as a long awn, awn smooth to toothed
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distal leaves. Sexual condition dioicous or pseudomonoicous; male plants as large as female plants or dwarfed and epiphytic on stem rhizoids of female plants;
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Volume 10. Herbs annual, biennial, or perennial, caulescent; from a usually large taproot, sometimes developing adventitious shoots from lateral roots producing
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Treatment on page 190. Mentioned on page 10, 191. Plants very small to large, as scattered individuals or colonies, green, reddish, whitish, or golden
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rarely biconvex, smooth to honeycomb-reticulate or with longitudinal rows of large depressions at 10–20X. Tubercles distinct from achene apex in color, texture
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Treatment on page 267. Mentioned on page 268, 272, 293. Plants small to large, in loose or compact tufts or forming extensive paches or mats, green, brown
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absent; kranz anatomy absent; midrib simple; adaxial bulliform cells present, large; stomata with dome-shaped or triangular subsidiary-cells; bicellular microhairs
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page 295. Mentioned on page 204, 267, 293, 294. Plants small, medium to large, mostly stiff and rigid, rarely pliant, robust to gracile, in green, yellow
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stout, pubescent and scaly or glabrous; leaf-scars shield-shaped or 3-lobed, large; pith solid and homogeneous. Bud-scales valvate or imbricate, glabrous or
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papillose, more or less plicate, plicae often serrate or serrulate, or rarely, large, twisted, covering capsules completely and clasping the distal end of seta
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peristome and operculum not differentiated. Calyptra mitrate. Spores rather large, 25–45 µm, papillose, spinose, reticulate, or pitted. Worldwide, mainly in
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on page 629. Mentioned on page 341, 342, 647, 475, 637. Plants small to large, in dense or loose mats, glaucous, green, brown, or yellowish-brown, dull
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155. Mentioned on page 10, 119, 132, 173, 178, 659. Plants small to very large, in dense or open turfs, red, pink, yellow-green, or brown-green. Stems 0
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wall, and 1–6 round to ovate pores per cell. Stem-leaves typically as large as or larger than branch leaves, lingulate to ovate-lingulate with broad rounded
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325. Mentioned on page 331, 338, 509, 575, 637. Plants in medium-sized to large wefts, often extensive sheets. Stems creeping to ascending or erect, sympodial
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usually sterile, occasionally staminate; lower paleas absent, small, or large, not thickened; upper florets variable, x = 9 or 10. Panicum subg. Agrostoidea
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individual plants can sometimes invade closed vegetation, large stands of willows require large disturbances. The zonation of willows on floodplains is a
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