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Sonchus oleraceus (common sow-thistle)
...more free-standing stems. Stem bloom: there is no powdery or waxy film on the stem. Flower head outer flowers: ...
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Cosmos bipinnatus (garden cosmos)
...more free-standing stems. Leaf spines: there are no spines on the leaf edges. Leaf blade shape: th...
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Solidago erecta (slender goldenrod)
...more free-standing stems. Bract shape: the main bracts are ovate (egg-shaped). Final leaf segment width (compound lvs only):...
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Senecio viscosus (sticky ragwort)
...more free-standing stems. Specific leaf type: the leaf has a row of two or more lobes on each side of the central axis. Smal...
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Sagina maxima (sticky-stemmed pearlwort)
...has free-central placentation, where the ovules develop on a central column in a compound ovary lacking septa or with septa at the base only. Fruit locules: ...
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Eupatorium altissimum (tall thoroughwort)
...more free-standing stems. Bract cycle number: there are three or more cycles of bracts. Leaf blade veins: ...
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Eutrochium maculatum (spotted Joe-Pye weed)
...more free-standing stems. Ray length: 0.0 mm–0.0 mm. Leaflet number: 0.0 NA–0.0 NA. S...
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Packera paupercula (balsam groundsel)
...more free-standing stems. Specific leaf type: the leaf has a row of two or more lobes on each side of the central axis. Ray ...
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Group 8: Herbaceous angiosperms with superior ovaries, actinomorphic flowers, and 2 or more distinct carpels: Dichotomous Key
...carpels free from the receptacle; fruit a leathery follicle, not enclosed by the receptacle (in part) 1b. Petiole, if present, attached at the base of the leaf blade; plants terrestrial o...
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Orchidaceae: Dichotomous Key
...viscidia free, not enclosed in a bursicle 9a. Labellum 3-lobed, the middle lobe much shorter than the lateral 2 [Fig. 161]; viscidia covered by membranes; orifice of spur covered by a m...