| ----------------------------------------------------------------------------------------- |
| TSN | ITIS Full Latin Name | Preferred Latin Name | ITIS Common Name(s) | Preferred Common Name(s) |
| ----------------------------------------------------------------------------------------- |
| 529725 | Platystemon californicus var. | cream cups | California creamcups |
| californicus |
| 41107 | Poa annua | annual bluegrass |
| 41123 | Poa douglasii | Douglas' bluegrass |
| 508131 | Poa howellii | Howell's bluegrass |
| 41103 | Poa secunda | Sandberg bluegrass |
| 504490 | Polycarpon depressum | California polycarpon | California manyseed |
| 504491 | Polycarpon tetraphyllum | four-leaved all-seed | fourleaf manyseed |
| 29328 | Polygala californica | California milkwort |
| 20872 | Polygonum arenastrum | ovalleaf knotweed |
| 20873 | Polygonum argyrocoleon | silversheath knotweed |
| 20860 | Polygonum lapathifolium | willow smartweed | curlytop knotweed |
| 41174 | Polypogon interruptus | ditch polypogon |
| 41171 | Polypogon monspeliensis | annual rabbitsfoot grass |
| 504522 | Polypogon viridis | (Agrostis viridis) | water bent | beardless rabbitsfoot grass |
| 22455 | Populus balsamifera ssp. | black cottonwood |
| trichocarpa |
| 22460 | Populus fremontii ssp. | Fremont's cottonwood |
| fremontii |
| 20422 | Portulaca oleracea | little hogweed |
| 39010 | Potamogeton pectinatus | fennel-leaf pondweed | sago pondweed |
| 24762 | Prunus | prunus |
| 525143 | Prunus ilicifolia ssp. lyonii | island cherry |
| 507647 | Pseudognaphalium bicolor | (Gnaphalium bicolor) | bicolored everlasting |
| 507649 | Pseudognaphalium | (Gnaphalium californicum) | green everlasting |
| californicum |
| 525051 | Pseudognaphalium | (Gnaphalium canescens ssp. | fragrant everlasting |
| canescens ssp. beneolens | beneolens) |
| 525053 | Pseudognaphalium | (Gnaphalium canescens ssp. | wite everlasting |
| canescens ssp. | microcephalum) |
| microcephalum |
| 507655 | Pseudognaphalium | (Gnaphalium luteo-album) | weedy cudweed |
| luteoalbum |
| 507659 | Pseudognaphalium | (Gnaphalium ramosissimum) | pink everlasting |
| ramosissimum |
| 508110 | Pseudognaphalium | (Gnaphalium stramineum) | cotton-batting |
| stramineum |
| 529898 | Psilocarphus tenellus var. | slender woollyheads |
| tenellus |
| 21317 | Pterostegia drymarioides | woodland pterostegia |
| 25291 | Pyracantha | pyracantha |
| 195065 | Quercus agrifolia var. | coast live oak | California live oak |
| agrifolia |
| 19312 | Quercus chrysolepis | canyon live oak |
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