Page 4: 57 results for capitulum
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Asteraceae Group 2: Dichotomous Key
...the capitulum with apical lobes or polygamous and then with unlobed, tubular corollas near the periphery and apically lobed corollas near the center of the capitulum 26a. All flowers of t...
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Asteraceae Group 4: Dichotomous Key
...each capitulum composed almost entirely of unisexual flowers; stems scaly bracteate; well-developed leaves all basal, the blades palmately lobed [Fig. 442] (in part) 2b. Plants polygamou...
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Crepis foetida (stinking hawk's-beard)
...the capitulum and slender ones 12-17 mm long borne from the interior of the capitulum).: Crepis vesicaria Family: Asteraceae Genus: Crepis
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Centaurea nigra (black knapweed)
...of capitulum sometimes enlarged and falsely appear as ray flowers (vs. C. nigra, with the apical appendage of involucral bracts longer than 2 mm, the larger ones mostly 4–6 mm long, with 7–15 fringe s...
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Asteraceae Group 5: Dichotomous Key
...of capitulum glabrous, the inner ones pubescent 10b. Rays absent or up to 2 mm long [Fig. 449]; leaf blades relatively less divided, usually toothed to pinnatifid; usually all the cypsela...
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Nabalus altissimus (tall rattlesnake-root)
...each capitulum with 7–9 inner involucral bracts and 9–15 flowers, and pappus deep red-brown (vs. N. latissimus, with each capitulum with 4–6 inner involucral bracts and 5 or 6 flowers, and pappus whit...
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Helenium autumnale (fall sneezeweed)
...per capitulum, neutral, disk flowers red-brown to purple-brown, and leaf blades entire to subentire (vs. H. autumnale, with ray flowers numbering mostly 13-21 per capitulum, carpellate, disk flowers y...
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Helenium flexuosum (purple-headed sneezeweed)
...per capitulum, carpellate, disk flowers yellow, and leaf blades coarsely toothed (vs. H. flexuosum, with ray flowers numbering mostly 8-13 per capitulum, neutral, disk flowers red-brown to purple-brow...
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Nabalus albus (white rattlesnake-root)
...each capitulum with 4–6 inner involucral bracts and 5 or 6 flowers, and pappus white to pale yellow (vs. N. albus, with each capitulum with 7–9 inner involucral bracts and 9–15 flowers, and pappus dee...
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Centaurea nigrescens (short-fringed knapweed)
...of capitulum not enlarged (vs. C. nigrescens, with the apical appendage of involucral bracts mostly 1–2 mm long, with 5–8 fringe segments on each margin, and outer flowers of capitulum sometimes enlar...