Cycas brachycantha is a species of cycad in the genus Cycas, native to northern Vietnam where it is endemic to Bắc Kạn Province. It grows in often soil-free cracks and crevices of limestone crests and ridges under the canopy of evergreen forests. The female cones are closed type, the sporophylls 8–12 cm long, dense brown tomentose, with two to four glabrous ovules, and soft lateral spines on the lamina, with no apical spine. The sarcotesta is yellow, the sclerotesta rough, ovoid. The male cones solitary and spindle shaped, yellow, 12–14 cm long and 3–4 cm diameter.