 Due to the popularity of Trillium grandiflorum as a garden specimen , conservation concerns have been raised as the vast majority of plants sold in commercial nurseries are believed to be collected from the wild . Indeed , there is little indication of any commercial nursery growth . Frederick and Roberta Case , botanists who specialize in trilliums , wrote in 1997 , " to our knowledge , no true commercial quantity ' propagation ' takes place at the present time . " Such heavy collecting , combined with other pressures such as habitat destruction and grazing , may effectively endanger the plants in some <unk> grandiflorum is legally listed as vulnerable in Quebec , primarily due to habitat destruction as the plant is found in forests neighboring the province 's most populous regions . It is listed as <unk> vulnerable in the state of New York , meaning that it might become threatened should certain factors not be mitigated . In Maine , it is listed as endangered , and might have been extirpated entirely . 
