Page 15: 350 results for involucre
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Hypochaeris radicata (hairy cat's-ear)
...puberulent, involucre 8–10 mm tall during anthesis, and rays relatively inconspicuous, not much exceeding the involucre and ca. 2 times as long as wide (vs. H. radicata, with leaf blades hispid, invol...
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Solidago latissimifolia (Elliott's goldenrod)
... involucre 2.5–4 mm tall, involucral bracts narrow-lanceolate to narrow-oblong, mostly 0.3–0.6 mm wide, acute at the apex, and disk corollas 2.5–3.5 mm long (vs. S. latissimifolia, with th...
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Quercus alba (eastern white oak)
...carpellate involucre concealing 1/3 to 1/2 or more of the nut (vs. Q. alba, with leaf blades cuneate at the base, on petioles 8–25 mm long, nut subsessile or on a peduncle mostly to 25 mm long, and ca...
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Centaurea nigrescens (short-fringed knapweed)
Centaurea nigrescens Willd.. short-fringed knapweed. Non-Monocots Composites Facts About: Short-fringed knapweed is native to Europe and introduced to North America, where it is foun...
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Erigeron hyssopifolius (hyssop-leaved fleabane)
...stiff, involucres 6-9 mm long, the involucral bracts with prominent, indurate keels, and body of cypsela mostly 3.5-4 mm long (vs. E. hyssopifolius, with leaf blades herbaceous, soft, involucres 4-6 m...
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Centaurea jacea (brown knapweed)
Centaurea jacea L.. brown knapweed. Non-Monocots Composites Facts About: Brown knapweed is native to Europe and introduced in North America. It is considered noxious in some states, ...
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Eupatorium pilosum (ragged thoroughwort)
... involucre 8–11 mm tall, with abaxially glabrous or sparsely pubescent involucral bracts (vs. E. pilosum, with the involucre 4–7 mm tall, with abaxially moderately to densely pubescent inv...
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Liatris spicata (sessile-headed blazing star)
...and involucre 9–17 mm tall (vs. L. spicata, with the capitula +/- sessile, with mostly 5–10 flowers, disk flowers 7–11 mm long, glabrous adaxially, and involucre 7–11 mm tall).: Liatris no...
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Omalotheca sylvatica (woodland arctic-cudweed)
... involucre 3-5 mm tall, body of the cypsela glabrous, 0.4-0.9 mm long, and plants annual (vs. O. sylvatica, with the involucre 5-7 mm tall, body of cypsela sparsely strigose, 1-1.5 mm long...
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Hypochaeris glabra (smooth cat's-ear)
...hispid, involucre 10–15 mm tall during anthesis, and rays evident, exceeding the involucre and ca. 4 times as long as wide (vs. H. glabra, with leaf blades glabrous or puberulent, involucre 8–10 mm ta...