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Gratiola: Dichotomous Key
... (8–) 10–25 (–30) mm long; corolla 12–16 mm long, yellow throughout (rarely white); capsule 2–3 mm long; plants perennial 1b. Leaf blades lanceolate to oblong or oblanceolate, with a narr...
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Polemonium: Dichotomous Key
...(1923b), but specimens are unknown. 1a. Corolla 2–5 mm long; leaves with 5–15 leaflets; plants annual; stems with abundant stipitate-glands 1b. Corolla 10–20 mm long; prim...
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Polygonum: Dichotomous Key
...apex, 2–2.8 mm long; tepals 2–3 mm long, often with a pouch-like protrusion near the base; plants usually prostrate and mat-forming
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Rhamnus: Dichotomous Key
... 2a. Petioles 5–15 mm long, (0.03–) 0.10–0.16 (–0.23) times as long as the blade; leaf blades with 5 or 6 (–8) pairs of primary lateral veins, abaxially pubescent with gold-yellow hairs on the...
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Sorbus: Dichotomous Key
... 2a. Leaf blades with 3–7 leaflets; terminal leaflet much larger than the lateral leaflets, often lobed 2b. Leaf blades with 11–17 leaflets; terminal leaflet +/- similar to latera...
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Saxifraga: Dichotomous Key
...8–20 cm tall 3b. Upper leaves without vegetative bulbils; inflorescence of 1–4 flowers; petals 3–5 mm long; stems cespitose, 2–10 cm tall 2b. Primary leaves with narrow-oblon...
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Parthenocissus: Dichotomous Key
...with 2 subequal branches; berry 8–10 mm long; leaflets of mature leaves (i.e., those from the proximal portion of season’s growth) borne on petiolules 5–20 (–30) mm long 2b. Tendrils con...
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Lappula squarrosa (bristly sheepburr)
...1.5–2.5 mm wide (vs. L. squarrosa, with mericarp bodies excluding the prickles 3–4 mm long, with 2 or rarely 3 rows of prickles around the margin, the prickles distinct, and corolla 2–4 mm wide).: ...
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Atriplex tatarica (Tatarian orache)
...to 20 mm tall and brown fruits 2--2.5 mm wide (vs. A. tatarica, with terminal inflorescence mostly 20--50 mm tall and brown fruits 1.5--2 mm wide).: Atriplex rosea ter...
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Carex atlantica (prickly bog sedge)
...1.2 mm–2.4 mm. Lowest spike length: 3.1 mm–13.1 mm. Perigynium shape: the perigynium body is orbi...