半开羊肚菌（学名：Morchella semilibera、英语：half-free morel）是羊肚菌科下的一种真菌，原产于欧洲与亚洲。

DNA分析显示虽然宏观看来没有差别，但半开羊肚菌其实是包含了三个被地理隔离的隐存种。由于奥古斯丁·彼拉姆斯·德堪多最初是以欧洲的样本描述此物种，因此学名Morchella semilibera应被限制只用来描述欧洲的物种。2012年，北美洲西部的半开羊肚菌被描述为一个学名为Morchella populiphila的新种，并再次使用Charles Horton Peck在1903年命名的Morchella punctipes描述广泛分布在北美西部洛矶山脉的半开羊肚菌。三种半开羊肚菌都与高羊肚菌（Morchella elata）等黑羊肚菌关系密切。

Morchella semilibera, commonly called the half-free morel, is a species of fungus in the family Morchellaceae native to Europe and Asia.

DNA analysis has shown that the half-free morels, which appear nearly identical on a macroscopic scale, are a cryptic species complex, consisting of at least three geographically isolated species. Because de Candolle originally described the species based on specimens from Europe, the scientific name M. semilibera should be restricted to the European species. In 2012, Morchella populiphila was described from western North America, while Peck's 1903 species name Morchella punctipes was reaffirmed for eastern North American half-free morels. M. semilibera and the other half-free morels are closely related to the black morels (M. elata and others).