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Gentianaceae: Dichotomous Key
...10–23 mm long, commonly 5-merous; ovules confined to bands along each of the 2 sutures of the ovary; calyx without an internal membrane; seeds smooth
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Cerastium: Dichotomous Key
...(2005a) based on a collection from Franklin County, MA—29 May 1892, Churchill s.n. (MO!). However, the specimen, though vegetatively robust, has anthers, sepals, and petals too short f...
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Oxalis: Dichotomous Key
... 2b. Inflorescence an umbel with (1–) 2–12 (–18) flowers; petals pink-purple to purple (rarely pink or white); sepals with a pair of orange tubercles at the apex (these confluent and appearing...
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Penstemon: Dichotomous Key
...5–12 mm long; leaf blades often finely serrate; lower bracts of inflorescence (2–)5–32 mm wide, lanceolate to ovate (rarely linear), usually with serrate margins 7b. Corolla 15–20 (–22) m...
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Fallopia: Dichotomous Key
...0.25–1 mm wide; achenes 2.4–2.9 mm long 6b. Fruiting tepals 4.2–9.4 mm long, with entire to weakly undulate and plane wings, the wings cream to pale brown or tinged with red, well-develop...
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Physalis: Dichotomous Key
...12–40 mm wide; flowering calyx 5–7 (–10) mm long 1b. Plants perennial from rhizomes; corolla 10–20 mm long; flowering calyx (4–) 6–12 (–15) mm long 5a. Corolla white, with 5 ...
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Avena strigosa (lopsided oat)
...mm–26.0 mm. Lemma awn length: 3.0 mm–35.0 mm. Floret number: 2.0 NA–2.0 NA. Leaf blade...
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Pinus sylvestris (Scotch pine)
...mostly 2–3.5 cm long, not glaucous, larger branches gray-brown, and seed cones serotinous, persisting on plant for many years (P. sylvestris, with leaves 3–7 cm long, glaucous, larger branches orange-...
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Cyperus pseudovegetus (marsh flatsedge)
... 2.0 mm–2.5 mm. plantlets budding at flower bases: no. floral bristle barbs: NA. ...
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Urtica dioica (stinging nettle)
... 25.0 mm–40.0 mm. Sepal color: white. Leaf blade edges: the edge of the leaf blade ...