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Toxicodendron: Dichotomous Key
...(1971). 1a. Leaves with 7–13 entire leaflets; inflorescence 7.5–20 cm long; stamens exserted from corolla; buds sessile, covered by scales; plants erect shrubs 2–7 m tall ...
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Sonchus: Dichotomous Key
... 1a. Plants perennial, with deep-seated, creeping rhizomes; capitula 3–5 cm wide in flower; involucre 14–22 mm tall in fruit 1b. Plants annual, with taproots; capitula 1.5–2.5 cm ...
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Tragopogon: Dichotomous Key
... 1a. Peduncles slender, not enlarged in flower and scarcely enlarged even in fruit; cypsela body including beak 15–25 mm long; involucre 12–24 mm tall in flower, becoming 19–38 mm tall in frui...
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Leontodon: Dichotomous Key
...6–11 mm tall during anthesis, calyculate 1b. Pappus of inner flowers and outer flowers alike, well-developed, with an inner series of plumose bristles and an outer series of slender scale...
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Carduus: Dichotomous Key
...involucres 12–17 mm tall; disk corollas 11–16 mm long 2b. Abaxial leaf blade surface with only curling, septate hairs; involucres 14–20 mm tall; disk corollas 13–20 mm long
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Euthamia: Dichotomous Key
... 1a. Leaf blades with numerous and prominent resin glands [Fig. 409], 1–3 (–6) mm wide; plants ± glabrous on the stem and leaf surfaces; axillary fascicles often well developed and conspicuous...
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Helenium: Dichotomous Key
...mostly 13–21 per capitulum [Fig. 416]; disk flowers yellow; larger leaf blades coarsely toothed 2b. Ray flowers neutral, numbering mostly 8–13 per capitulum, rarely absent; disk flowers r...
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Anchusa: Dichotomous Key
... 1a. Corolla zygomorphic, the basal tube bent; mericarps obliquely oriented in life, 1–2 mm tall; plants annual 1b. Corolla actinomorphic, the basal tube straight; mericarps obliq...
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Raphanus: Dichotomous Key
...4–12 seeds; petals usually yellow fading to white; taproot slender 1b. Siliques 5–10 mm thick, widest below the middle and tapering toward the beak, not or scarcely constricted between th...
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Lychnis: Dichotomous Key
...than 1.5 mm, with mostly 10–20 pairs of lanceolate to ovate leaf blades 20–60 mm wide; petals with 2 apical lobes 2b. Stems glabrous or pubescent with short hairs, the hairs shorter than ...