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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Annual or perennial herb, +- glandular and/or with segmented hairs. Stem: 0, or prostrate and creeping with adventitious roots at nodes, or shortly decumbent to erect, ribbed, white-cobwebby. Leaf: alternate, basal in rosettes and/or cauline, petioled, (2)5--20(30+) cm, (1)2--5(7) cm wide, [ovate] obovate to spoon-shaped, +- deeply pinnately lobed, ultimate margin +- dentate-prickly [entire or shallowly toothed] or distal +- entire, adaxially finely cobwebby [densely woolly], abaxially densely white-woolly. Inflorescence: heads radiate, 1, peduncled; phyllaries graduated in 3--6 series, proximal narrowed to spreading or reflexed, awn-like, tips fringed, distal with expanded membranous tips; receptacle flat, +- pitted, pit margins with short, membranous scales, epaleate. Ray Flower: sterile; ray adaxially yellow throughout or with +- deeper yellow proximal band (dried rays yellow or proximally +- white with distal blue margin and distally blue to +- brown-purple), abaxially yellow to +- blue, red, or purple; style 0. Disk Flower: corolla yellow throughout, or distally +- green to +- black; anther tip ovate-triangular; style tip proximally slender, thickened distal to a minutely hairy node, branches minute. Fruit: obovoid-elliptic, compressed, 4--5-ribbed, faces roughened, woolly to +- glabrous, occasionally with proximal cluster of segmented hairs; pappus of [2--3] 6--10 scales < fruit, crown-like, or 0.
Species In Genus: 5 species: native southern Africa. Etymology: (Greek: bear-capsule, probably for woolly fruit)
eFlora Treatment Author: Alison M. Mahoney & Robert J. McKenzie
Jepson Online Interchange
Key to ArctothecaPrevious taxon: Arctium minus
Next taxon: Arctotheca calendula
Citation for this treatment: Alison M. Mahoney & Robert J. McKenzie 2017. Arctotheca, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=77538, accessed on January 20, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on January 20, 2017.