<p>A grove in the *Campus Martius, located between the *Stagnum Agrippae and the *Euripus (Strabo 13.1.19: ἐν τῷ ἄλσει τῷ μεταξὺ τῆς λίμνης καὶ τοῦ εὐρίπου) probably just N of the *Horti of Agrippa. M. Agrippa adorned the park with ‘The Fallen Lion’ of Lysippus (Strabo, <i>loc. cit.</i>), and it is this donation, as well as Agrippa’s extensive building activities in the area, that allows the <i>nemus</i> to be associated with his name. The common modern name for this wood, <i>nemus Thermarum</i>, is not attested in the sources, which only mention a <i>nemus</i> or ἄλσος without an epithet.</p> <p>When describing Tigellinus’ waterborne banquet on the Stagnum, Tacitus notes that a grove (<i>nemus</i>) was adjacent to and clearly visible from the revelers’ pleasure-craft (<i>Ann.</i> 15.37). Since the Euripus exited the Stagnum near its SW corner, the <i>nemus</i> probably spread along the W bank of the pool, filling the triangular space between the two waterworks; its borders to the N and W remain unknown (Coarelli 1995; id. 1977). Perhaps the pre-Domitianic foundations beneath the Stadium of Domitian (SW of the intersection of Corsia Agonale and Corso del Rinascimento) indicate its maximum N extent (Colini, Ghini).</p> <p>Richardson interprets the Strabo and Tacitus passages to suggest two separate groves; the <i>nemus</i> of Tacitus he places N of the Stagnum (267), and that mentioned in Strabo he believes is synonymous with the Horti of Agrippa, which he has to extend from the *Hecatostylum to the Thermae of Nero to include the Euripus, Stagnum and Tacitean <i>nemus</i> (196). However, there is no good reason to suppose that Tacitus refers to a wood any different from that mentioned by Strabo, nor to stretch ἄλσος, ‘grove’, into ‘horti’ (also contra, Ghini 169-70).</p>