Dwarf Yaupon Holly

ASPCA has no dedicated page for Ilex vomitoria (Yaupon Holly); its Holly page covers Ilex opaca (American Holly) by name. Both are in the same genus (Ilex) and ASPCA rates Ilex opaca Toxic to Dogs, Toxic to Cats, and Toxic to Horses (toxic principle: saponins). Dwarf yaupon is presumed toxic by this same-genus relation to American Holly, consistent with NC State Extension's independent note that Ilex vomitoria fruit causes a matching mild pattern (nausea, vomiting, diarrhea) in humans.

ASPCA's dedicated Holly page covers Ilex opaca (American Holly) specifically -- its alternate-names list does not include Yaupon, so this was always a same-genus extrapolation rather than a direct species match. ASPCA rates Ilex opaca Toxic to Dogs, Toxic to Cats, and Toxic to Horses, toxic principle saponins, clinical signs vomiting, diarrhea, and depression, with a note that 'leaves and berries are low toxicity' -- a milder end of the toxic spectrum, not a severe/emergency-tier plant. NC State's page for Ilex vomitoria specifically independently confirms a matching mild pattern for humans (nausea, vomiting, diarrhea from fruit) and notes wildlife (songbirds, small mammals) safely eat the berries, and that this species hosts two native butterfly species (Henry's Elfin and Holly Azure) as larval food -- an ecological upside worth surfacing alongside the toxicity caveat.