Page 28: 989 results for opposite
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Thalictrum: Dichotomous Key
...inflorescence opposite (though sometimes appearing whorled when the leaves are divided to the base); sepals 5–18 mm long, conspicuous, usually persisting through anthesis 1b. Stem leaves ...
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Asclepias variegata (red-ringed milkweed)
...with opposite leaves, the middle 1 or 2 nodes with a whorl of 4 leaves, or rarely all the leaves opposite, and corolla lobes 4.5–6 mm long (vs. A. variegata, with stems with 2–5 leaf-bearing nodes, al...
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Asclepias quadrifolia (four-leaved milkweed)
...with opposite leaves, and corolla lobes 7–9 mm long (vs. A. quadrifolia, with stems with usually 3 or 4 leaf-bearing nodes, the upper and lower nodes with opposite leaves, the middle 1 or 2 nodes with...
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Zannichellia palustris (horned-pondweed)
...subopposite, mature fruits borne on stalks 12-19 mm long, and stigma capitate (vs. Z. palustris, with leaves opposite, mature fruits borne on stalks 0.3-1.2 mm long, and stigma funnelform).: ...
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Orchidaceae: Dichotomous Key
...or opposite, borne at base of plant and/or distributed along the stem 14a. Flowers subtended by foliaceous, ovate bracts [Fig. 179]; labellum ornamented with 3 parallel, green, papillose ...
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Section Acrocystis: Dichotomous Key
...sheath opposite the leaf blade shallowly concave, the cleft extending 0.2–1.6 mm below the junction with the leaf blade 4b. Perigynia with a beak 0.9–1.6 mm long and 0.5–1 times as long a...
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Helianthus: Dichotomous Key
...leaves opposite (except often the upper); receptacle usually convex to some degree; disk corollas yellow (red-purple in H. pauciflorus) 4a. Reproductive stems with 3–5 (–8) nodes b...
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Diodia virginiana (Virginia buttonweed)
...The opposite leaves are joined across the stem by a hairy tissue, and they sometimes are mottled yellow due to a virus. It has thick roots by which it can spread vegetatively. It resembles Diodia ter...
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Dioscorea polystachya (Chinese yam)
... opposite: there are two leaves per node along the stem. Spathe: the plant does not have a spathe. Fruit width: ...
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Alternanthera pungens (khaki joyweed)
... opposite: there are two leaves per node along the stem. Spines on plant: the plant has no spines. Leaf form: ...