| Criteria: found in Siskiyou County • is native • group by lifeform | ||||
| 3506 records | include photos for these plants | # number of sources | ||
| Scientific Name | Common Name | Lifeform | # |
Lifeform: Annual | 680 plants | ||
|
Lifeform: Biennial | 2 plants | ||
|
Lifeform: Perennial | 2288 plants | ||
Lifeform: Fern | 79 plants | ||
| Adiantum aleuticum | Five finger fern | Fern | 9 |
| Adiantum capillus-veneris | Venus hair | Fern | 14 |
| Adiantum shastense | Shasta adiantum | Fern | |
| Aspidotis densa | Lace fern | Fern | 1 |
| Asplenium septentrionale | Northern spleenwort | Fern (rhizomatous) | |
| Asplenium trichomanes | spleenwort | Fern (rhizomatous) | 3 |
| Asplenium trichomanes ssp. trichomanes | spleenwort | Fern (rhizomatous) | |
| Athyrium distentifolium | Fern | ||
| Athyrium distentifolium var. americanum | American alpine lady fern | Fern | |
| Athyrium filix-femina | Common ladyfern | Fern | 19 |
| Athyrium filix-femina ssp. cyclosorum | Subarctic ladyfern | Fern | |
| Athyrium filix-femina var. cyclosorum | Western lady fern | Fern | 1 |
| Azolla mexicana | Mexican mosquito fern | Fern | |
| Azolla microphylla | Mexican mosquito fern | Fern | |
| Botrychium crenulatum | Scalloped moonwort | Fern (rhizomatous) | |
| Botrychium minganense | Mingan moonwort | Fern (rhizomatous) | |
| Botrychium montanum | Western goblin | Fern (rhizomatous) | |
| Botrychium multifidum | Common grapefern | Fern | |
| Botrychium pinnatum | Northwestern moonwort | Fern (rhizomatous) | |
| Botrychium pumicola | Crater lake grapefern | Fern | |
| Botrychium simplex | Little grape fern | Fern | |
| Botrychium simplex var. compositum | Little grapefern | Fern | |
| Botrychium simplex var. simplex | Least moonwort | Fern | |
| Botrychium virginianum | Rattlesnake fern | Fern | |
| Botrypus virginianus | Rattlesnake fern | Fern | |
| Cheilanthes gracillima | Lace lip fern | Fern | 1 |
| Cheilanthes intertexta | Coastal lipfern | Fern | |
| Cryptogramma acrostichoides | American parsley fern | Fern | |
| Cryptogramma cascadensis | Cascade parsely fern | Fern | |
| Cystopteris fragilis | Brittle fern | Fern | 1 |
| Dryopteris arguta | Wood fern | Fern | 7 |
| Dryopteris expansa | Spreading wood fern | Fern | 4 |
| Equisetum arvense | Common horsetail | Fern | 6 |
| Equisetum hyemale | Scouringrush horsetail | Fern | 31 |
| Equisetum hyemale ssp. affine | Giant scouring rush | Fern | 7 |
| Equisetum hyemale var. affine | Scouringrush horsetail | Fern | 4 |
| Equisetum laevigatum | Smooth scouring rush | Fern | 2 |
| Equisetum telmateia | Giant horsetail | Fern | 3 |
| Equisetum telmateia ssp. braunii | Giant horsetail | Fern | 1 |
| Equisetum telmateia var. braunii | Giant horsetail | Fern | 1 |
| Isoetes bolanderi | Bolander's quillwort | Fern | |
| Isoetes bolanderi var. pygmaea | Bolander's quillwort | Fern | |
| Isoetes echinospora | Spiny spored quillwort | Fern | |
| Isoetes howellii | Quillwort | Fern | |
| Isoetes nuttallii | Nuttall's quillwort | Fern | |
| Isoetes occidentalis | Western quillwort | Fern | |
| Isoetes tenella | Spiny spore quillwort | Fern | |
| Marsilea vestita | Hairy waterclover | Fern | 6 |
| Marsilea vestita ssp. vestita | Hairy pepperwort | Fern | 5 |
| Myriopteris gracillima | Lace lip fern | Fern | 1 |
| Myriopteris intertexta | Coastal lip fern | Fern | |
| Ophioglossum pusillum | Northern adder's tongue | Fern (rhizomatous) | |
| Pellaea brachyptera | Sierra cliff brake | Fern | |
| Pellaea breweri | Brewer's cliff brake | Fern | |
| Pellaea mucronata | Bird's foot fern | Fern | 2 |
| Pentagramma triangularis | Gold back fern | Fern | 3 |
| Pentagramma triangularis ssp. triangularis | Gold back fern | Fern | |
| Polypodium californicum | California polypody | Fern | 12 |
| Polypodium calirhiza | Licorice fern | Fern | 3 |
| Polypodium glycyrrhiza | Licorice fern | Fern | 8 |
| Polypodium hesperium | Western polypody | Fern | |
| Polystichum californicum | California sword fern | Fern | |
| Polystichum imbricans | Narrow leaved sword fern | Fern | 1 |
| Polystichum imbricans ssp. curtum | Cliff sword fern | Fern | |
| Polystichum imbricans ssp. imbricans | Rock sword fern | Fern | |
| Polystichum kruckebergii | Kruckeberg's sword fern | Fern (rhizomatous) | |
| Polystichum lemmonii | Lemmon's sword fern | Fern | 1 |
| Polystichum lonchitis | Holly fern | Fern (rhizomatous) | |
| Polystichum munitum | Western sword fern | Fern | 43 |
| Polystichum scopulinum | Mountain holly fern | Fern | |
| Pteridium aquilinum | Western brackenfern | Fern | 5 |
| Pteridium aquilinum var. pubescens | Western bracken fern | Fern | |
| Selaginella densa | Lesser spikemoss | Fern (mosslike) | |
| Selaginella densa var. scopulorum | Rocky mountain spike moss | Fern (mosslike) | |
| Selaginella wallacei | Wallace's spike moss | Fern (mosslike) | |
| Thelypteris nevadensis | Sierra marsh fern | Fern | |
| Woodsia oregana | Cliff fern | Fern | |
| Woodsia scopulina | Cliff fern | Fern | |
| Woodwardia fimbriata | Western chain fern | Fern | 31 |
|
Lifeform: Shrub | 365 plants | ||
|
Lifeform: Tree | 74 plants | ||
| Abies Xshastensis | Shasta red fir | Tree | |
| Abies amabilis | Lovely fir | Tree | 6 |
| Abies concolor | White fir | Tree | 22 |
| Abies grandis | Grand fir | Tree | 16 |
| Abies lasiocarpa | Subalpine fir | Tree | 11 |
| Abies lasiocarpa var. lasiocarpa | Subalpine fir | Tree | |
| Abies magnifica | Magnificant silver fir | Tree | 3 |
| Abies magnifica var. magnifica | California red fir | Tree | |
| Abies magnifica var. shastensis | Shasta red fir | Tree | |
| Abies procera | Noble fir | Tree | 14 |
| Acer macrophyllum | Bigleaf maple | Tree | 52 |
| Acer negundo | Boxelder | Tree | 30 |
| Acer negundo var. californicum | California box elder | Tree | 30 |
| Acer negundo var. interius | Boxelder | Tree | 27 |
| Alnus rhombifolia | White alder | Tree | 38 |
| Arbutus menziesii | Madrono | Tree | 35 |
| Callitropsis bakeri | Modoc cypress | Tree | 2 |
| Callitropsis nootkatensis | Alaska cedar | Tree | 10 |
| Calocedrus decurrens | Incense cedar | Tree | 40 |
| Chamaecyparis lawsoniana | Port orford cedar | Tree | 14 |
| Cupressus bakeri | Baker's cypress | Tree | 7 |
| Cupressus lawsoniana | Port orford cedar | Tree | 14 |
| Cupressus nootkatensis | Alaska cedar | Tree | 1 |
| Fraxinus latifolia | Oregon ash | Tree | 29 |
| Hesperocyparis bakeri | Baker's cypress | Tree | 7 |
| Juglans californica var. hindsii | Northern california black walnut | Tree | 13 |
| Juglans hindsii | Northern california black walnut | Tree | 13 |
| Juniperus grandis | Sierra juniper | Tree | |
| Juniperus occidentalis | Western juniper | Tree | 2 |
| Juniperus occidentalis var. australis | Sierra juniper | Tree | |
| Juniperus occidentalis var. occidentalis | Western juniper | Tree | 2 |
| Picea breweriana | Weeping spruce | Tree | 1 |
| Picea engelmannii | Engelmann spruce | Tree | 7 |
| Pinus albicaulis | Whitebark pine | Tree | 1 |
| Pinus attenuata | Knobcone pine | Tree | 6 |
| Pinus balfouriana | Foxtail pine | Tree | 1 |
| Pinus balfouriana ssp. balfouriana | Klamath foxtail pine | Tree | |
| Pinus contorta | Lodgepole pine | Tree | 30 |
| Pinus contorta ssp. bolanderi | Bolander's beach pine | Tree | 1 |
| Pinus contorta ssp. murrayana | Lodgepole pine | Tree | 4 |
| Pinus jeffreyi | Jeffrey pine | Tree | 17 |
| Pinus lambertiana | Sugar pine | Tree | 13 |
| Pinus monticola | Western white pine | Tree | 10 |
| Pinus ponderosa | Yellow pine | Tree | 29 |
| Pinus ponderosa var. ponderosa | North plateau ponderosa pine | Tree | 2 |
| Pinus ponderosa var. washoensis | Washoe pine | Tree | |
| Pinus sabiniana | Gray pine | Tree | 28 |
| Pinus washoensis | Washoe pine | Tree | |
| Populus balsamifera ssp. trichocarpa | Black cottonwood | Tree | 27 |
| Populus fremontii | Fremont cottonwood | Tree | 32 |
| Populus fremontii ssp. fremontii | Cottonwood | Tree | 4 |
| Populus tremuloides | Quaking aspen | Tree | 28 |
| Populus trichocarpa | Black cottonwood | Tree | 27 |
| Pseudotsuga menziesii | Douglas fir | Tree | 31 |
| Pseudotsuga menziesii var. menziesii | Douglas fir | Tree | 4 |
| Quercus Xmorehus | Oracle oak | Tree | 1 |
| Quercus chrysolepis | Gold cup live oak | Tree | 24 |
| Quercus chrysolepis var. nana | Canyon live oak | Tree | 25 |
| Quercus garryana | Oregon oak | Tree | 24 |
| Quercus garryana var. breweri | Oregon oak | Tree | 2 |
| Quercus garryana var. garryana | Oregon oak | Tree | 1 |
| Quercus garryana var. semota | Oregon white oak | Tree | |
| Quercus kelloggii | California black oak | Tree | 24 |
| Salix bebbiana | Gray willow | Tree | 2 |
| Salix laevigata | Polished willow | Tree | 17 |
| Salix lasiandra | Pacific willow | Tree | 20 |
| Salix lasiandra var. lasiandra | Pacific willow | Tree | 6 |
| Salix lucida ssp. lasiandra | Shining willow | Tree | 6 |
| Taxus brevifolia | California yew | Tree | 11 |
| Taxus brevifolia var. brevifolia | Tree | 11 | |
| Taxus brevifolia var. reptaneta | Pacific yew | Tree | 11 |
| Tsuga heterophylla | Western hemlock | Tree | 14 |
| Tsuga mertensiana | Patton spruce | Tree | 13 |
| Umbellularia californica | California bay | Tree | 40 |
|
Lifeform: Vine | 2 plants | ||
|
Pink background indicates a plant is non-native.
! indicates a plant is potentially invasive. |
||
| NB: found in Siskiyou County is intended to indicate only plants found growing in the wild. However, the evidence is not always clear, and may occasionally include plants found in cultivation. To verify the wild presence of any particular plant in the list above, please click through to Calflora and look closely at the observations in this county. | ||