Today's free book is The Flora of the Sacred Nativity by Alfred E. P. Raymund Dowling (1900): An attempt at collecting the legends and ancient dedications of plants connected in popular tradition with the life of our blessed Lord from his nativity to the flight into Egypt: preceded by an essay upon the flora sacra. For the table of contents, check at the bottom of this post below the image.
The book is available at Hathi Trust (I have not checked for other online sources).
Table of Contents
Essay upon the Flora Sacra
Advent and the Novena of the Nativity
The Holy Night
Some Flowering Trees
The Holy Thorn of Glastonbury
St. Patrick's Bush at Tours
The Dagny Thorn
The Cadnam Oak
Fruit-bearing Trees
Some Flowering Plants
The Rose-Mary
Christmas Roses
Types of the Incarnation
Tree of Jesse or Rod of Jacob
Jacob's Ladder, or Scala Coeli
The Burning Bush
Gideon's Fleece
Filius ante Patrem
Cradle-Grasses
Mary's Milkworts
The Visitation of the Shepherds
The Circumcision and Giving of the Holy Name
Candlemas, or the Presentation in the Temple
The Adoration of the Kings and the Bethlehem Star
Childermas, or the Massacre of the Holy Innocents
The Flight into Egypt
The Repose in Egypt