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Key to ElymusView taxon page for Elymus
(For a list of species in Elymus, use the above link.) Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. 2. Inflorescence branched, at least at base 3. Stem 11–35 dm, 6–10 mm wide at base; blade  Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped. 15–35 mm wide; spikelet  1. In Poaceae, one or more florets (each a flower with subtending lemma and generally palea) and generally 2 subtending glumes; in a sterile spikelet, the flower(s) and sometimes palea(s) are rudimentary or absent. 2. In Cyperaceae, the smallest aggregation of flowers (generally more than 2) and associated bracts. 10–40 per node  Position on a stem from which one or more structures (especially leaves, buds, branches, or flowers) arise. (inc branches) ..... E. condensatus 3' Stem 6.5–21 dm, 3.5–5 mm wide at base; blade 6–15 mm wide; spikelet 2–6 per node ..... E. ×gouldii (2) 2' Inflorescence spike-like (raceme-like), spikelets 1. In Poaceae, one or more florets (each a flower with subtending lemma and generally palea) and generally 2 subtending glumes; in a sterile spikelet, the flower(s) and sometimes palea(s) are rudimentary or absent. 2. In Cyperaceae, the smallest aggregation of flowers (generally more than 2) and associated bracts. sessile  Without a petiole, peduncle, pedicel, or other kind of stalk. or some slightly stalked (< 1 mm) 4. Plants of coastal beaches, dunes, and bluffs 5' Glumes flat, lanceolate  Narrowly elongate, widest in the basal half, often tapered to an acute tip. 4' Plants of other habitats 7. Glumes 0 or << lowest lemma  In Poaceae, the lower, generally larger of two sheathing bracts subtending a flower, generally ensheathing the palea (in a sterile lemma, the associated flower and sometimes palea are rudimentary or absent); with the palea and flower, comprising the floret. ..... E. californicus 7' Glumes 2 (on at least upper spikelets in Elymus salina), equal or unequal, but > 1/2 lowest lemma 8. Inflorescence axis breaking apart with age 9' Spikelets 2(3) per node; glumes awn-like 10' Glumes entire  Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.). or 2(3)-cleft; auricles often lacking ..... E. elymoides 11. Glumes 2 on all spikelets; palea  1. In Asteraceae, a scale-like bract that subtends an individual flower on the receptacle (equal to 'chaff scale' in TJM), absent in some genera, restricted to a ring separating ray and disk flowers in most tarweed species. 2. In Poaceae, the distal, generally smaller of two sheathing bracts subtending a flower, generally two-veined and -keeled and ensheathed by the lemma; with the lemma and flower, comprising the floret. veins generally not extended as short bristles ..... var. brevifolius 11' Glumes on spikelets at lower nodes Position on a stem from which one or more structures (especially leaves, buds, branches, or flowers) arise. appearing to be 3, 1 a glume-like sterile floret; palea veins generally extended as short bristles 12. Glumes entire; lemma awns  1. Bristle-like appendage or elongation, generally terminal. 2. Stiff, needle-like pappus element in Asteraceae. generally > glume  In Poaceae, each of generally two sheathing bracts that are the lowermost parts of a spikelet, subtending one or more florets. awns ..... var. californicus 8' Inflorescence axis remaining intact with age 13. Lemma awn 1. Bristle-like appendage or elongation, generally terminal. 2. Stiff, needle-like pappus element in Asteraceae. generally 10–40 mm 14. Lemma awn curving outward with age 15. Stem erect  Upright; vertically oriented. at base, 30–100 cm; sagebrush steppe, woodland, < 1650 m ..... E. spicatus 15' Stem decumbent  lying mostly flat on the ground but with tips curving up. at base, generally 20–50 cm; alpine, subalpine conifer forest, > 1800 m ..... E. sierrae 14' Lemma awn straight or wavy, but not curving outward (sometimes slightly curved in Elymus glaucus) 16' Spikelets generally 1 per node 17. Anthers 4–7 mm; inflorescence internodes  Segment of an axis (generally a stem) between successive positions (nodes) from which one or more structures (especially leaves, buds, branches, or flowers) arise. generally 9–27 mm ..... E. stebbinsii (2) 13' Lemma awn 0–10(15) mm 18. Glumes generally awl-like, or if lanceolate, then often inconspicuously 0–3(5)-veined, hard or tough textured, and awn-tipped or acute  Having a short-tapered, sharp tip, the sides convex or straight and converging at less than a right angle. 19. Spikelets 2–7 per node 20. Stem node region generally densely pubescent; plants generally cespitose  Having a densely clumped, tufted, matted, or cushion-like growth form. ..... E. cinereus 20' Stem node region glabrous; plants rhizomatous 21. Leaf blades generally 3–6 mm wide; spikelets 2(3) per node, 3–7 florets  In Poaceae, a single flower and its immediately subtending bracts (lemma and generally palea, the lemma subtending the palea when the latter is present); in a sterile floret, the flower and sometimes palea are rudimentary or absent. ..... E. triticoides (2) 21' Leaf blades generally 6–15 mm wide; spikelets 2–6 per node, with 6–9 florets ..... E. ×gouldii (2) 19' Spikelets generally 1 per node (sometimes 2–3 in Elymus salina) 22' Florets not twisted, back of lowermost lemma not centered between glumes 23. Plants generally cespitose (sometimes weakly rhizomed); stem 30–90 cm; cauline leaves present; glumes not curved distally ..... E. salina 23' Plants rhizomatous; stem 20–100 cm; leaves mostly basal  At or near the base of a plant or plant part. Especially said of leaves clustered near the ground or of a placenta confined to the base of an ovary. ; glumes ± curved distally ..... E. smithii 18' Glumes flat, narrowly to broadly lanceolate, strongly 3–9-veined, thin (if thickened, tip obtuse) 24. Glume tips rounded, obtuse  Having a short-tapered, blunt tip or base, the sides convex or straight and converging at more than a right angle. to truncate  Abruptly (not gradually) narrower or smaller at base or tip, as if cut straight across or nearly so. 24' Glume tips acute to acuminate  Having a long-tapered, sharp tip, the sides concave. and/or awned 28' Spikelets generally 1 per node
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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .
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