| ----------------------------------------------------------------------------------------- |
| TSN | ITIS Full Latin Name | Preferred Latin Name | ITIS Common Name(s) | Preferred Common Name(s) |
| ----------------------------------------------------------------------------------------- |
| 30030 | Centaurium exaltatum | desert centaury |
| 30032 | Centaurium muehlenbergii | Muhlenberg's centaury |
| 35374 | Centranthus ruber | red valarian | Jupiter's beard |
| 19955 | Cerastium glomeratum | sticky chickweed |
| 527244 | Cercocarpus montanus var. | (Cercocarpus betuloides var. | island mountain mahogany | island mountain mahogany |
| blancheae | blancheae) |
| 195863 | Cercocarpus montanus var. | birchleaf mountain mahogany |
| glaber |
| 527253 | Chaenactis glabriuscula var. | pincushion flower | yellow pincushion |
| lanosa |
| 506893 | Chasmanthe floribunda | chasmanthe |
| 20592 | Chenopodium album | lambsquarters |
| 20590 | Chenopodium ambrosioides | Mexican tea | Mexican tea |
| epazote |
| 20594 | Chenopodium berlandieri | pitseed goosefoot |
| 20598 | Chenopodium californicum | California goosefoot |
| 20621 | Chenopodium multifidum | cutleaf goosefoot |
| 20622 | Chenopodium murale | nettleleaf goosefoot |
| 42899 | Chlorogalum pomeridianum | wavyleaf soapplant |
| 21029 | Chorizanthe staticoides | turkish rugging |
| 21035 | Chorizanthe wheeleri | Santa Barbara spineflower |
| 35796 | Chrysanthemum coronarium | crowndaisy |
| 36763 | Cichorium intybus | chicory |
| 36344 | Cirsium brevistylum | Indian thistle | clustered thistle |
| 531191 | Cirsium occidentale var. | California thistle |
| californicum |
| 527377 | Cirsium occidentale var. | cobwebby thistle |
| occidentale |
| 531491 | Cirsium occidentale var. | red thistle |
| venustum |
| 36392 | Cirsium ochrocentrum | yellowspine thistle |
| 36428 | Cirsium vulgare | bull thistle |
| 501559 | Cistanthe maritima | (Calandrinia maritima) | seaside calandrinia | seaside pussypaws |
| 501560 | Cistanthe monandra | (Calyptridium monandrum) | pussypaws | common pussypaws |
| 27594 | Clarkia davyi | Davy's fairyfan |
| 27597 | Clarkia epilobioides | canyon fairyfan |
| 27615 | Clarkia prostrata | prostrate fairyfan |
| 27619 | Clarkia purpurea ssp. | winecup fairyfan |
| quadrivulnera |
| 27632 | Clarkia unguiculata | elegant fairyfan |
| 525126 | Claytonia parviflora ssp. | miner's lettuce |
| parviflora |
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