Indian rhubarb n 1: rhizomatous perennial herb with large dramatic peltate leaves and white to bright pink flowers in round heads on leafless stems; colonizes stream banks in the Sierra Nevada in California [syn: {umbrella plant}, {Darmera peltata}, {Peltiphyllum peltatum}] 2: Asian herb (Himalayas) [syn: {Himalayan rhubarb}, {red-veined pie plant}, {Rheum australe}, {Rheum emodi}]