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Lathyrus: Dichotomous Key
...elliptic, 2–2.4 times as long as wide 2b. Leaves with 2 leaflets [Fig. 640]; non-native plants originating from cultivation 5a. Plants annual, without rhizomes; inflorescence...
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Family: Lamiaceae (mint family)
...with 2 of the 5 lobes forming an upper lip of the flower, and the other 3 lobes forming a lower lip. There are 2 or 4 stamens and an ovary with 2 carpels. The fruit is a schizocarp, and splits into 4 ...
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Plantaginaceae: Dichotomous Key
...corolla 25–45 mm long; plants 40–80 (–120) cm tall, perennial 7b. Calyx lobes unequal, all longer than the basal, connate portion of the corolla; corolla 10–15 mm long; plants (5–) 20–50 ...
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Dendrolycopodium: Dichotomous Key
...in 2 upper, 2 lower, and 2 lateral ranks [Fig. 8] 1b. Trophophylls of the upright shoot’s main axis 0.5–0.7 mm wide, appressed to ascending (i.e., diverging at an angle of less than 30 d...
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Taxus: Dichotomous Key
... 2a. Low shrubs with straggling, diffusely branched habit; leaf blades 1–2 (–2.4) mm wide; stomates in 5–7 (–9) rows in each band; petioles gradually curved or with an abrupt bend near the jun...
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Schoenoplectus: Dichotomous Key
...0.5–2 mm long; achenes 2–2.8 mm long, with a style beak 0.2–0.5 mm long 7b. Stems soft, with 2–4 aerenchymal lacunae in cross-section at ⅔ stem height, each lacuna 1–2.5 mm in diam...
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Neottia: Dichotomous Key
...(2002). 1a. Labellum divided ½ or more of its length into 2 pointed, linear segments [Fig. 171]; column 0.5–1 mm tall; floral bracts about 0.7–2.0 mm long; pedunce usually longe...
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Malaxis: Dichotomous Key
...(2002). 1a. Labellum entire, acuminate at the apex; pedicels (1–) 2–4.5 mm long; bracts 1.5–2 mm long; inflorescence less crowded and tapering to a slender apex 1b. Labell...
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Impatiens: Dichotomous Key
...and 2 upper ones that are small and sepaloid or petaloid. There are 5 petals—an upper one that is concave and projected upward or forward and 2 lower ones that are each formed from 2 connate petals. ...
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Triosteum: Dichotomous Key
...(1923). 1a. Sepals 9–12 mm long, conspicuously hispid-ciliate, the abaxial surface glabrous or short-pubescent; stem long-pubescent, the longer hairs 1.5–3 mm long; leaf blades 2–6 cm ...