Плод — разлика између измена

 

== Литература ==

{{refbegin|30em}}

* {{Cite book |ref= harv|last=Heiser|first=Charles B. |title=Weeds in My Garden: Observations on Some Misunderstood Plants |url=https://books.google.com/?id=nN1ohECdSC8C&pg=PA93&lpg=PA93&dq=cocklebur |year=2003|publisher=Timber Press |isbn=978-0-88192-562-3|pages=93–95}}