PURPOSE: A new variety of the flame grass is provided to be used as useful basic materials for the development of biomass resources to produce bioenergy by greatly increasing the number of tillers compared to the wild type which is not irradiated by the gamma-ray. CONSTITUTION: A new variety of the flame grass (accession number: KCTC 12110BP) has increased number of tillers compared to the wild type which is not irradiated by the gamma-ray, and is obtained by irradiating the gamma-ray to the Miscanthus sinensis to induce the mutant. The gamma-ray is irradiated as the dose of 110~150 Gy. The tiller number is increased by 30~80% compared to the wild type which is not irradiated by the gamma-ray.본 발명은 억새 (Miscanthussinensis) 종자에 감마선을 조사하여 돌연변이체를 유도하여 수득되는 것을 특징으로 하는, 분얼수가 감마선을 조사하지 않은 야생형에 비해 증가된 특성을 갖는 억새의 신품종을 제공한다.