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Callitriche: Dichotomous Key
...(1951). 1a. Flowers and fruits not subtended by bracts; leaf blades ± uniform, never forming a floating rosette 2a. Schizocarp 0.5–0.7 mm long, borne on a short pedicel 0...
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Persicaria: Dichotomous Key
...5–31 mm wide, sagittate at the base, the basal lobes directed backward; peduncles glabrous; styles trifid, 1–1.5 mm long; achenes trigonous, 3–3.5 mm long 6b. Leaf blades deltate, 10–150 ...
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Thalictrum: Dichotomous Key
...(1997). 1a. Leaves subtending the inflorescence opposite (though sometimes appearing whorled when the leaves are divided to the base); sepals 5–18 mm long, conspicuous, usually persist...
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Eleusine indica (goosegrass)
...mm–1.0 mm. Lemma awn base: NA. Lemma awn length: 0.0 mm–0.0 mm. Leaf sheath clos...
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Sparganium emersum (simple-stemmed bur-reed)
...mm–18.0 mm. Number of carpels: 1.0 NA–1.0 NA. Stem hairs: the stem is nearly or completely hairless. ...
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Symphoricarpos albus (common snowberry)
...outcrops.1a. Branchlets glabrous; leaf blades glabrous abaxially; drupe mostly (10–) 12–15 mm in diameter; cultivated shrubs mostly 1–2 m tall … 1a. S. albus ssp. laevigatus ...
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Orchidaceae: Dichotomous Key
...labellum 1.3–12 mm long; flowers 3–180 per inflorescence 17a. Principal leaves arranged in a single, opposite pair on the stem; labellum 2-lobed due to a conspicuous apical notch [Figs. 1...
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Amaranthaceae: Dichotomous Key
... 17a. Plants glabrous or farinose, but not glandular (in part) 17b. Plants with stipitate glands or subsessile glands (in part) 11b. Leaf blades oblong or lanceol...
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Section Vesicariae: Dichotomous Key
...0.7–1.2 (–1.4) mm long; carpellate spikes 9–12 mm thick 6b. Perigynium beak terminated with 2 strongly outcurved teeth 1.3–2.1 (–2.8) mm long; carpellate spikes 12–18 mm thick ...
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Chenopodium: Dichotomous Key
...achenes 1–1.5 mm wide 10a. Achenes 1–1.2 mm wide, with rounded margins; inflorescence typically much longer and standing well above the principal foliage leaves 10b. Achenes ...