无芒雀麦（学名：Bromus inermis），也称禾萱草、无芒草，是一种可作为牧草和人工草场的禾本目植物。

一年生草本；叶片偏硬线形，长约15到20厘米，两面具有细柔的毛；直立茎干分4至6节；夏季开花，圆锥花序开展，分枝细弱下垂，小穗扁平，含有7-14小花，外稃有芒；黑褐色扁平种子平均每粒重4毫克。须状地下根系发达。

Bromus inermis is a species of the true grass family (Poaceae). This bunchgrass is native to Europe.

The plant is characterized by an erect, leafy, long-lived perennial, 46 to 91 cm (1 ⁄₂ to 3 ft) tall, rhizomatous and commonly producing a dense sod. It starts growth in early spring; flowers May to July; reproduces from seeds, tillers, and rhizomes. It may regrow and re flower in the fall if moisture is sufficient. The leaves are glabrous or occasionally pubescent, particularly on the sheaths; blades 20 to 38 cm (8 to 15 in) long, 0.6 to 1.3 cm (⁄₄ to ⁄₂ in) wide, flat, with a raised and keeled midrib below; sheaths closed, except near collar, and papery when dry; leaves rolled in the bud; ligates up to 0.3 cm (⁄₈ in) long, rounded, and membranous; auricles absent.