claim: Brown University's main campus is located in the third smallest city in New England.
evidence: Marestail -LRB- also mare 's tail and mare 's - tail -RRB- can refer to  :. Plants. Conyza canadensis , an annual weed also known as horseweed and Canadian fleabane. Conyza canadensis. Conyza canadensis. Equisetum , a fern ally also known as horsetail and pipeweed. Equisetum. Equisetum. Hippuris , a genus of aquatic flowering plants , including  :. Hippuris. Hippuris. Hippuris vulgaris , the common mare 's - tail. Hippuris. Hippuris. Hippuris vulgaris. Hippuris vulgaris. Waterfalls. Grey Mare 's Tail , near Moffat in Dumfriesshire , Scotland. Grey Mare 's Tail , Llanrwst in the Conwy valley in north Wales. Other. Mare 's tail , a type of cirrus cloud formation .. cirrus cloud. cirrus cloud