Duplicated genera (Erigeron, Mentha, Iris) on the source list are excluded as well as unusual botanical hybrid format (Polystichum munitum x californicum, Lithophragma affine x heterophyllum) and duplicate Cirsium callilepis (=Cirsium remotifolium), Carex dudleyi (=Carex densa), Elymus trachycaulus subsecundum (=Elymus trachycaulus), Vulpia microstachys microstachys (=Vulpia microstachys pauciflora)
Alisma triviale implied by Alisma plantago-aquatica
Gastridium phleoides implied by Gastridium ventricosum
Adiantum aleuticum implied by Adiantum pedatum
Gamochaeta ustulata implied by Gnaphalium purpureum (=Gamochaeta purpurea)
The following are treated as synonyms:
Equisetum hymenale (=Equisetum hyemale)
Pellaea andromedaefolia (=Pellaea andromedifolia)
Heracleum lanatum (=Heracleum maximum)
Aster chilensis (=Symphyotrichum chilense)
Aster radulinus (=Eurybia radulina)
Baccharis douglasii (=Baccharis glutinosa)
Chamomilla suaveolens (=Matricaria discoidea)
Conyza bonariensis (=Erigeron bonariensis)
Filago californica (=Logfia filaginoides)
Filago gallica (=Logfia gallica)
Gnaphalium canescens beneolens (=Pseudognaphalium beneolens)
Gnaphalium californicum (=Pseudognaphalium californicum)
Gnaphalium luteo-album (=Pseudognaphalium luteoalbum)
Gnaphalium stramineum (=Pseudognaphalium stramineum)
Grindelia camporum camporum (=Grindelia camporum)
Grindelia hirsutula hirsutula (=Grindelia hirsutula)
Hemizonia fitchii (=Centromadia fitchii)
Madia elegans densiflora (=Madia elegans)
Madia madioides (=Anisocarpus madioides)
Madia nutans (=Harmonia nutans)
Micropus californicus californicus (=Micropus californicus californicus)
Micropus californicus subvestitus (=Micropus californicus subvestitus)
Picris echioides (=Helminthotheca echioides)
Psilocarphus tenellus globiferus (=Psilocarphus chilensis)
Solidago californica (=Solidago velutina californica)
Amsinckia menziesii intermedia (=Amsinckia intermedia)
Arabis glabra (=Turritis glabra)
Cardaria draba (=Lepidium draba)
Coronopus didymus (=Lepidium didymum)
Rorippa nasturtium-aquaticum (=Nasturtium officinale)
Campanula prenanthoides (=Asyneuma prenanthoides)
Lonicera hispidula vacillans (=Lonicera hispidula)
Sambucus mexicana (=Sambucus nigra)
Silene californica (=Silene laciniata californica)
Spergula arvensis arvensis (=Spergula arvensis)
Chenopodium botrys (=Dysphania botrys)
Convolvulus occidentalis (=Calystegia purpurata)
Marah fabaceus (=Marah fabacea)
Pyrola picta (=Pyrola picta)
Chamaesyce maculata (=Euphorbia maculata)
Chamaesyce serpyllifolia serpyllifolia (=Euphorbia serpyllifolia serpyllifolia)
Eremocarpus setigerus (=Croton setigerus)
Lotus humistratus (=Acmispon brachycarpus)
Lotus micranthus (=Acmispon micranthus)
Lotus purshianus purshianus (=Acmispon americanus americanus)
Lotus scoparius (=Acmispon glaber)
Lotus wrangelianus (=Acmispon wrangelianus)
Melilotus alba (=Melilotus albus)
Lithocarpus densiflorus (=Notholithocarpus densiflorus)
Quercus wislizenii (=Quercus wislizeni)
Centaurium muehlenbergii (=Zeltnera muehlenbergii)
Juglans californica hindsii (=Juglans hindsii)
Satureja douglasii (=Clinopodium douglasii)
Stachys ajugoides rigida (=Stachys rigida rigida)
Lythrum hyssopifolium (=Lythrum hyssopifolia)
Sidalcea malvaeflora laciniata (=Sidalcea malviflora laciniata)
Camissonia graciliflora (=Tetrapteron graciliflorum)
Camissonia ovata (=Taraxia ovata)
Epilobium pygmaeum (=Epilobium campestre)
Linanthus ciliatus (=Leptosiphon ciliatus)
Linanthus harknessii (=Leptosiphon harknessii)
Linanthus jepsonii (=Leptosiphon jepsonii)
Linanthus latisectus (=Leptosiphon latisectus)
Linanthus parviflorus (=Leptosiphon parviflorus)
Phlox gracilis gracilis (=Microsteris gracilis gracilis)
Polygonum convolvulus (=Fallopia convolvulus)
Polygonum hydropiperoides (=Persicaria hydropiperoides)
Polygonum persicaria (=Persicaria maculosa)
Centunculus minimus (=Anagallis minima)
Rhamnus californica californica (=Frangula californica californica)
Rhamnus crocea crocea (=Rhamnus crocea)
Cotoneaster pannosa (=Cotoneaster pannosus)
Potentilla glandulosa glandulosa (=Drymocallis glandulosa glandulosa)
Rubus discolor (=Rubus armeniacus)
Saxifraga californica (=Micranthes californica)
Saxifraga integrifolia (=Micranthes integrifolia)
Antirrhinum vexillo-calyculatum breweri (=Antirrhinum vexillocalyculatum breweri)
Scrophularia californica californica (=Scrophularia californica)
Veronica peregrina xalapensis (=Veronica peregrina)
Phyla nodiflora nodiflora (=Phyla nodiflora)
Phoradendron villosum villosum (=Phoradendron serotinum tomentosum)
Scirpus fluviatilis (=Bolboschoenus fluviatilis)
Scirpus mucronatus (=Schoenoplectus mucronatus)
Juncus phaeocephalus paniculatus (=Juncus phaeocephalus paniculatus)
Lilaea scilloides (=Triglochin scilloides)
Brodiaea californica leptandra (=Brodiaea leptandra)
Disporum hookeri (=Prosartes hookeri)
Smilacina racemosa (=Maianthemum racemosum)
Zigadenus fremontii (=Toxicoscordion fremontii)
Aira elegantissima (=Aira elegans)
Calamagrostis rubesecens (=Calamagrostis rubescens)
Elymus trachycaulus trachycaulus (=Elymus trachycaulus)
Festuca idaoensis (=Festuca idahoensis)
Glyceria occidentalis (=Glyceria × occidentalis)
Lamarkia aurea (=Lamarckia aurea)
Vulpia microstachys microstachys (=Vulpia microstachys)
Vulpia myuros myuros (=Vulpia myuros)
Rare perennial herb, known only from the Skovie Spring.
Rare perennial, known only along Franz Creek east of Franz Valley Road.
Frequent perennial herb in springs, creekbeds and marshes.
Frequent on dry slopes, scree, and rock outcrops.
Infrequent on rock outcrops. Along road to Bechtel Cabin, road past dump. At Pepperwood found on serpentine and redeposited volcanic ash.
Rare, known only from the Redwood Canyon on a bank of redeposited volcanic ash.
Frequent herbaceous perennial in shaded woods or on moist banks.
Infrequent at seasonal springs. Garrison, road past dump.
Frequent giant fern (to 8 feet) in springs and streams. Big Spring, Skovie, Barnes Creek, Redwood Canyon, below Rogers, Box Elder Canyon, Piney Canyon, Weimar Canyon. Native Californians pounded th... More
Infrequent on north slopes and in moist areas. Rogers, Garrison.
Frequent in woods and along streams.
Frequent fern of cool woods, north slopes, along streams.
Frequent in woods and on rock outcrops. This is the only California fern genus frequently seen as an epiphyte. I have never seen it epiphytic at Pepperwood. This phenomenon appears to be limited to... More
Abundant tree. Redwood Canyon, Franz Valley Road, Mark West Creek, Kitchen, Barnes Creek, Weimar Canyon. The redwoods in the Devil?s Kitchen were burned in the 1964 Calistoga fire and have since tr... More
Uncommon tree, known only from the Redwood Canyon where 15 to 20 mature trees produce seedlings. California nutmeg is named for the fruits, which resemble the seeds of Myristica fragrans, from whic... More
Rare tree. Garrison; along the ridge between Garrison and Three-Tree Hill, with a 3 foot tall seedling nearby; above the Bechtel House; south base of Telegraph Hill; Weimar Flat; KV. This tree is c... More
Uncommon tree. Garrison; uphill of the cattleguard east of the Bechtel Cabin; Devil?s Kitchen; on the middle ridge of the Redwood canyon; on the flat south of Weimar Canyon near Musante?s fenceline... More
Rare aquatic perennial, known only from Hagels Lake, where it is common, and at the largest of the Double Ponds. Cosmopolitan, all continents.
Rare Australian escaped exotic tree. Along Franz Valley Road by the Mountain House.
Rare Mediterranean perennial: Finnel Cabin, Double Ponds, Franz Creek, Knights Valley.
Frequent European annual of Grassland.
Infrequent annual of disturbed areas, such as creek beds.
Rare annual, known only from the Mountain House.
Frequent annual of Grassland. Amphitropical distribution.
Rare annual, known only from Garrison.
Infrequent annual of Grassland.
Infrequent annual of grassland and disturbed areas. The varieties of T. albopurpureum are problematic, intergrade and seem of little value.
Frequent annual of Grassland.
Rare annual, known only from grassland below Strebel.
Frequent European annual of grazed grassland. A favorite plant of cows and kids. The foliage is heavily grazed forming low spots in the winter grassland. The fertilized flowers turn down and bury t... More
Infrequent European annual along roads. Used by Caltrans as a reseeding material on roadcuts in the area.
Rare Mediterranean annual of grassland.
Infrequent annual of shady Oak Woodland.
In 1981 this European annual was known only from a grassy field east of the Pippindale Pond. Like many Pepperwood plants it is probably recently introduced and spreading. It is now common all over ... More
Infrequent European annual of Grassland.
Infrequent European annual of grassland.
Rare Eurasian perennial herb, known only from the big road cut north of the Mountain House.
Frequent annual of disturbed Grassland, from southern Europe.
Rare European annual, known only from the north side of Franz Valley Road.
Infrequent Eurasian annual to 8 feet tall. Franz Valley Road, Mark West Creek.
Rare European perennial herb, disturbed areas. Windy Valley Farm; bed of Franz Creek.
Frequent subshrub of Chaparral. An important deer browse plant.
Frequent annual of thin soil and road cuts, often on serpentine.