This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
1. M. aurea (fig. 111), syn. Bavtonia aurea. - A very hand-some Californian annual, better known under the latter name.
Fig. 111. Mentzelia aurea. (1/4 nat. eize.)
It grows about 2 feet high, with whitish branches, hispid leaves, and bright yellow flowers.
2. M. bartonioides, syn. Eucnide and Microsperma. - Very near the preceding, but with smaller yellow flowers.