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Youngia japonica is now considered a pantropical weed. Relatively few specimens in the flora match what Babcock and Stebbins called subsp. elstonii, with cauline leaves almost as large as the basal and with conspicuous, lobed bracts at the bases of the proximalmost branches of the capitulescence. In subsp. japonica, to which most of our specimens are referred, the cauline leaves are much reduced or lacking, as are the bracts of the capitulescence.

Sources and Credits

1. (c) Jason Sharp, some rights reserved (CC BY-NC-SA), uploaded by Jason Sharp, http://www.flickr.com/photos/78235221@N05/7161462972
2. (c) 2012 Zoya Akulova, some rights reserved (CC BY-NC), http://calphotos.berkeley.edu/cgi/img_query?seq_num=406771&one=T
3. Michael Kesl, no known copyright restrictions (public domain), https://www.biolib.cz/IMG/GAL/57081.jpg
4. (c) 2012 Zoya Akulova, some rights reserved (CC BY-NC), http://calphotos.berkeley.edu/cgi/img_query?seq_num=406773&one=T
5. (c) Sphl, some rights reserved (CC BY-SA), https://upload.wikimedia.org/wikipedia/commons/4/40/Youngja_japonica1.jpg
6. (c) Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/19814545

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