Species Anthidium oblongatum - Oblong Woolcarder
Wool carder bees of the genus Anthidium in the Western Hemisphere (Hymenoptera: Megachilidae): diversity, host plant associa...By Victor H. Gonzalez , Terry L. Griswold
Zoological Journal of the Linnean Society, Vol. 168(2), pp. 221–425, 2013
This is an outstanding reference covering New World members of the genus Anthidium
The full title is:
"Wool carder bees of the genus Anthidium in the Western Hemisphere (Hymenoptera: Megachilidae): diversity, host plant associations, phylogeny, and biogeography"
The 200+ page revision can be:
1) Freely viewed online at the URL: https://academic.oup.com/zoolinnean/article/168/2/221/2433440/Wool-carder-bees-of-the-genus-Anthidium-in-the
The Pollen-Collecting Bees of the Anthidiini of California (Hymenoptera: Megachilidae)By Grigarick, A. A. and L. A. Stange
Bulletin of the California Insect Survey, University of California, 1968
Text of 113 pages, with 41 maps and 227 figures at the end of the paper.
Phylogeny of the bee family Megachilidae (Hymenoptera: Apoidea) based on adult morphologyBy Gonzalez V.H., Griswold T.L., Praz C.J., Danforth B.N.
Syst. Entomol. 37: 261-286, 2012
California Bees & Blooms: A Guide for Gardeners and NaturalistsBy Gordon G. Frankie, Robbin W. Thorp, Rollin E. Coville, Barbara Ertter
Heyday (in collaboration with the California Native Plant Society), Berkeley, California, 2014
Info on this book, its focus, and its authors, can be found at this Univ. of Calif. Extension link
The book, including index, is 294 pages. The initial 8 chapters (126 pp.) focus on ecology, natural history, and family-by-family profiles of California bee taxa. Chapter 9 (pp. 127-144) addresses flowers and their relationship to bees. The remainder of the book focuses how to make home and other gardens more bee friendly to promote healthy and diverse urban/suburban bee populations. There are many fine photos.