| 0 | PI 555780 | R. californicum 1093-48 | Ribes californicum Hook. & Arn. var. hesperium (McClatchie) Jeps. | California, United States | |  | Historic | 1450752 |
| 1 | PI 150802 | 'Blue Cloud' | Ceanothus spp. | California, United States | | | Historic | 1887756 |
| 2 | PI 150803 | | Ceanothus gloriosus J. T. Howell | California, United States | | | Historic | 1887757 |
| 3 | PI 150804 | | Ceanothus dentatus Torr. & A. Gray | California, United States | | | Historic | 1887758 |
| 4 | PI 150805 | | Ceanothus spp. | California, United States | | | Historic | 1887759 |
| 5 | PI 150806 | | Ceanothus jepsonii Greene | California, United States | | | Historic | 1887760 |
| 6 | PI 150807 | | Ceanothus cuneatus (Hook.) Nutt. var. fascicularis (McMinn) Hoover | California, United States | | | Historic | 1887761 |
| 7 | PI 150808 | | Ceanothus thyrsiflorus Eschsch. var. thyrsiflorus | California, United States | | | Historic | 1887762 |
| 8 | PI 150809 | | Ceanothus cuneatus (Hook.) Nutt. var. rigidus (Nutt.) Hoover | California, United States | | | Historic | 1887763 |
| 9 | PI 150810 | | Ceanothus spp. | California, United States | | | Historic | 1887764 |
| 10 | PI 150811 | 'Theodore Payne' | Ceanothus spinosus Nutt. | California, United States | | | Historic | 1887765 |
| 11 | PI 150812 | | Cercis occidentalis Torr. ex A. Gray | California, United States | | | Historic | 1887766 |
| 12 | PI 150813 | | Cercis occidentalis Torr. ex A. Gray | California, United States | | | Historic | 1887767 |
| 13 | PI 150814 | | Garrya fremontii Torr. | California, United States | | | Historic | 1887768 |
| 14 | PI 150815 | | Romneya coulteri Harv. | California, United States | | | Historic | 1887769 |