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Coreopsis palmata (stiff tickseed)
...12–25 mm wide, and internodes of stem usually short-pubescent (vs. C. palmata, with leaf blades trifurcating well above the base, therefore the blades appearing to be on a broadly winged petiole, with...
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Mimulus brevipes (wide-throated monkey-flower)
...(2-10 mm, <1/2 inch long). Habitat: anthropogenic (man-made or disturbed habitats) All Characteristics: New England state: Massachusetts. ...
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Geum virginianum (cream-colored avens)
...1-2 mm long above the persistent calyx, and petals 1-2 mm long (vs. G. virginianum, with the epicalyx present, cluster of achenes sessile or nearly so with respect to the calyx, and petals 2–4 mm long...
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Phacelia distans (distant scorpion-weed)
...10–25 seeds ca. 0.5 mm long (vs. P. distans, with the corolla white to blue, with a pair of ovate appendages near the base between the filaments, styles 7–12 mm long, glabrous, and capsules with 2–4 s...
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Lamiaceae: Dichotomous Key
... 22a. Corolla 4-lobed, nearly actinomorphic, the upper lobe slightly wider than the others and often emarginate at the apex (rarely with 5 subequal lobes) (in part) 22b. Corolla z...
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Group 4: Woody angiosperms with opposite or whorled leaves: Dichotomous Key
... 21a. Flowers without perianth; fruit a follicle 21b. Flowers with perianth; fruit a capsule, berry, achene, or drupe 22a. Perianth 5-merous 23a. Coroll...
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Ranunculus: Dichotomous Key
...0.2–0.5 mm long 2b. Petals yellow; leaf segments flat; achenes smooth on the surface, with a beak 0.4–1.8 mm long 3a. Petals 7–12 mm long; achenes 1.8–2.2 mm long, the lower ...
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Potentilla: Dichotomous Key
...than 2 times as long as wide; plants taller, 20–40 cm at anthesis; rhizome 20–80 ×5–20 mm 2b. Flowers usually few to many in a terminal cyme (the flowers rarely solitary); stems e...
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Salix key for carpellate reproductive material: Dichotomous Key
...0.16–0.28 mm wide 25b. Floral bracts 1.2–3 mm long (mean=1.8 mm); styles (0.3–) 0.5–1.3 mm long; stigmas 0.24–0.56 mm wide 22b. Floral bracts pale yellow-brown to green-yello...
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Viola key for chasmogamous flowering material: Dichotomous Key
... 22b. Leaf blades narrow-ovate, with rather uniform teeth along the margin 21b. Sepals ovate to narrow-ovate or ovate-oblong, obtuse to rounded at apex [Fig. 937] 23a...