The pink spikes suggest that the plant illustrated in this page is Vervain / Verbena Officinalis. Other candidates that were also known as “erba colombina” are Corydalis Cava and Stellaria Media / Chickenweed. The drawing of the plant is accompanied by two snakes (illustrating the myth discussed in the text) and a monk apothecary in his laboratory.
Transcription: Erba antefilo lontano [read montano?] piperina minore alia | colonbina elsugho bollito collolardo diporco | maschio eciera posto alleveghie piaghe molto | salda el morso divipera pesta eposta leva ilve | leno ei dolore tolle essalda bene ongni picchola | ferita che nonsia dubitosa dicisi per molti che questa | erba la conosce la serpe quando elle ferita la coglie | e polla alla ferita sua essaldabene elluna serpe lapo | rta allaltra :----
Translation: Mountain antefilo, lesser piperina or | colombina. The juice, boiled with the fat of a male | swine and wax, applied to old wounds, greatly | helps for viper bite. Crushed and applied, [the plant] takes the poison | away and cures the pain. It heals well all small | wounds which are not troublesome. Many say that this | plant is known to the snake that, when wounded, picks it | and places it on the wound, healing it well. And one snake takes | it to the other.