甘遂属大戟科,是多年生毒草,自生于荒野、坟堆、田埂、和耕地里。在春初发芽抽茎,四、五月开花结子,在六月上旬前全茎枯死;小暑节前后再发芽抽茎,八、九月间开花结实,霜降后枯萎。初出土的嫩苗呈紫红色,后变紫绿、茎直立,高达尺许。通常由基部分生数枝 Ganzi is a genus of Euphorbiaceae, a perennial weed that grows in wilderness, graves, fields, and arable land. At the beginning of spring, the stems were drawn and stems were harvested. In April and May, they bloomed. The whole stems died before the beginning of June. The stems were harvested before the small summer festival. The stems blossomed in August and September and withered after the frost fell. The young shoots that were unearthed in the first year were purple-red, later changed to purple green and stems upright, reaching up to the feet. Usually born from the base