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Isotria: Dichotomous Key
... 1a. Sepals 12–25 mm long, usually green-yellow throughout; lateral petals 13–18 mm long; labellum 10–15 mm long; peduncle 10–15 mm long, shorter than the ovary; non-flowering plants commonly ...
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Corallorhiza: Dichotomous Key
... 1a. Labellum without lateral lobes; lateral sepals up-curved; plants flowering late-August through late September 1b. Labellum with a lateral lobe or tooth on each side [Fig. 162...
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Poaceae Group 9: Dichotomous Key
... 11a. Inflorescence a panicle with compound branches distributed along an elongate axis, the ultimate branches of the panicle being rames; pedicel of pedicellate spikelet 1–3.3 mm long ...
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Sphenopholis: Dichotomous Key
... 1b. Spikelets 1.5–4.2 mm long; second lemma lacking an awn or rarely with a short point 2a. Second lemma prominently scabrous [Fig. 275]; anthers 1.2–1.6 mm long 2b....
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Vulpia: Dichotomous Key
... 1b. Lower glume 1.7–5 mm long, mostly 66–75% as long as the upper glume [Fig. 283]; awn of lowest lemma 0.3–12 mm long 2a. Spikelets with 5–13 close florets [Fig. 283]; rachilla ...
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Phleum: Dichotomous Key
... 1b. Plants perennial; reproductive stems 20–100 cm tall 3a. Glume awns 0.8–3.2 mm long, the longer ones 1.5 mm or longer; [Fig. 251]; stems not bulbous-thickened at the base, smo...
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Piptatherum: Dichotomous Key
...(10–) 12 cm 1b. Lemmas pale green, gray, or pale brown; leaves with ligules, those of the upper leaves 1.5–3 mm long, the uppermost blades involute, 1–2 mm wide, shorter than 10 (–12) cm ...
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Agrostis: Dichotomous Key
... 10a. Glumes 1.7–3 mm long; anthers 1–1.5 mm long; caryopses 0.8–1.2 mm long; stolons usually present 10b. Glumes 2.5–3.8 mm long; anthers 0.5–0.8 mm long; caryopses 1.4–2 mm long...
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Andropogon: Dichotomous Key
...(13–) 30–109 cm long; ligules 0.6–2.2 mm long; mature peduncles of the rames (4–) 11–35 (–60) mm long 2b. Leaves with smooth sheaths, the blades 11–30 (–52) cm long; ligules 0.2–1 mm long...
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Rhus: Dichotomous Key
... 1b. Leaves with 7–31 leaflets, the terminal leaflet lanceolate to oblong or narrow-ovate and either ± entire or serrulate throughout; inflorescence a terminal panicle 2a. Leaflet...