POTRERO/ RIFLE CAMP MEADOWS and loop back to Rock
Spring via Barth’s retreat, Laurel Dell, Cataract trail:
By Doreen Smith, started May 28th,
then added- to with a CNPS group on June 17th 2006, last update 7 July 2009
A list of plants that may be seen about the trail from
Rock Spring Meadow to Rifle Camp / Potrero Meadows via the
back of the
Mountain Theater, then we took the Fire Road to the N.E. A return loop to Rock Spring can be made via
the Benstein
trail or Simmons trail. A longer return loop can be taken via Barth’s Retreat,
Laurel Dell and the Cataract
Trail to the Rock Spring parking area. Some plants on
this list are from observations made along these trails.
ACERACEAE (MAPLE FAMILY)
Acer macrophyllum Big-leaf
maple
ANACARDIACEAE (SUMAC FAMILY)
Toxicodendron
diversilobum Poison
Oak
APIACEAE/ UMBELLIFERAE (PARSLEY FAMILY)
Cicuta
douglasii Water
Hemlock (Potrero Mdw W. in marsh )
Lomatium
dasycarpum Woolly
Hog-fennel
Oenanthe
sarmentosa Water
Parsley
Perideridia
kelloggii Kellogg's
Yampah
Sanicula
bipinnatifida
Red-purple sanicle
Sanicula
crassicaulis Snake-root
Sanicle
Sanicula
laciniata Lace-leaf
Sanicle
Sanicula
tuberosa Turkey
Pea
Tauschia
kelloggii Yellow
Parsley
Torilis
arvensis Hedge-parsley *
ARALIACEAE (GINSENG FAMILY)
Aralia
californica Elk-clover,
Ca. Ginseng
ASCLEPIADACEAE (MILKWEED FAMILY)
Asclepias
fascicularis Mexican
Milkweed
ASTERACEAE (ASTER/ SUNFLOWER FAMILY)
Achillea
millefolium Yarrow
Adenocaulon
bicolor Trail
Marker
Agoseris
grandiflora Native
Dandelion
Agoseris
hirsuta Mountain
Dandelion
Anisocarpus
madioides Woodland
Madia
Baccharis
pilularis Coyote
Brush
Calycadenia
multiglandulosa White
Rosinweed
Cirsium
hydrophilum var. vaseyi Mt.
TamalpaisThistle (Rifle Camp/Potrero) LIST
1B.2
Cirsium
occidentale var. occidentale Cobweb
Thistle
Erigeron
reductus var. angustatus Serpentine
Rayless Daisy
Eriophyllum
confertiflorum var. confertiflorum Golden
Yarrow
Eriophyllum
lanatum var arachnoideum Woolly
Daisy (Mountain Theatre)
Eurybia
radulina Broad-leaved
Aster
Gamochaeta
purpurea Silver-leaf
Cudweed
Gnaphalium
palustre Marsh
Cudweed
Grindelia
hirsutula var. davyi Sticky
Grindelia
Helenium
puberulum Sneezewedd
Hesperevax
sparsiflora var. sparsiflora Inland
Evax
Hieracium
albiflorum White
Hawkweed
Holozonia
filipes White
Stream-bed Tarplant (Rock Spring)
Lactuca
saligna Willow-leaved
Lettuce *
Lasthenia
californica or L. gracilis Goldfields
Madia
exigua Threadstem
Madia
Madia gracilis Small
Madia
Micropus
californicus Cotton
Top
Microseris
douglasii ssp. douglasii Douglas'
Dandelion
Psilocarphus
tenellus Woolly
Marbles
Rigiopappus
leptocladus Rigiopappus
Senecio
aronicoides Butterweed
Solidago
californica Goldenrod
(Rock Spring)
Symphyotrichum chilense Common
Aster
BETULACEAE (BIRCH FAMILY)
Corylus
cornuta var. californica Hazelnut
BLECHNACEAE (DEER-FERN FAMILY)
Woodwardia
fimbriata Chain
Fern
BORAGINACEAE (BORAGE FAMILY)
Cynoglossum
grande Hound's
Tongue
Plagiobothrys
nothofulvus Popcorn
Flower
Plagiobothrys
sp. Popcorn
Flower(Rock Spring wetland)
BRASSICACEAE (MUSTARD FAMILY)
Arabis
glabra Tower
Mustard (Rock Spring)
Cardamine
californica var. californica Woodland
Milk-maids
Cardamine
oligosperma Bitter-cress
Streptanthus
batrachopus Tamalpais
jewelflower (Simmons trail) LIST 1B.3
Streptanthus
glandulosus ssp. pulchellus Mt.Tamalpais
Jewel-flower LIST 1B.2
CAMPANULACEAE (BELLFLOWER FAMILY)
Campanula
griffinii Serpentine
Harebell)
Githopsis
specularioides Bluecup
Heterocodon
rariflorum Tiny
Bellflower (Rifle Camp)
CAPRIFOLIACEAE (HONEYSUCKLE FAMILY)
Lonicera
hispidula var. vacillans California
Honeysuckle
Symphoricarpos
mollis Trailing
Snowberry
CARYOPHYLLACEAE (PINK FAMILY)
Minuartia
douglasii Serpentine
Sandwort
Moehringia
macrophylla Perennial
Sandwort (poss. ext. here)
Stellaria
nitens Slender
Shining Chickweed
CONVOLVULACEAE (MORNING-GLORY FAMILY)
Calystegia
collina Serpentine
Morning-glory
Calystegia
purpurata ssp. purpurata Coastal
Morn ing-glory
Calystegia
subacaulis ssp. subacaulis Short-stem
Morning-glory
Dichondra
donelliana Pony's
Foot
CRASSULACEAE (STONE-CROP FAMILY)
Crassula
connata Sand
Pigmy-weed
Dudleya
cymosa ssp. cymosa Rock
Lettuce
CUCURBITACEAE (GOURD FAMILY)
Marah
fabaceus Manroot
CUPRESSACEAE (CYPRESS FAMILY)
Cupressus
(Callitropsis) sargentii Sargent
Cypress (Barth’s retreat)
CUSCUTACEAE (DODDER FAMILY)
Cuscuta
californica Dodder
Cuscuta
subinclusa (on Thermopsis) Dodder
(Rifle camp)
CYPERACEAE (SEDGE FAMILY)
Carex densa
Dense-flowered
Sedge
Carex
globosa Round-fruited
Sedge
Carex
serratodens Serpentine-seep
Sedge
Carex spp. Carex
species undetermined
Scirpus
microcarpus Small-fruited
Sedge
DENNSTAEDTIACEAE (BRACKENFERN FAMILY)
Pteridium
aquilinum var. pubescens Western
Brackenfern
DRYOPTERIDACEAE (WOODFERN FAMILY)
Athyrium
filix-femina var. cyclosorum Ladyfern
Dryopteris
arguta Common
Woodfern
Polystichum
munitum Common
Swordfern
EQUISETACEAE (HORSE-TAIL FAMILY)
Equsetum
arvense Common
Horsetail
Equisetum
telmateia Large
Horsetail
ERICACEAE (HEATHER FAMILY)
Arbutus
menziesii Madrone
Arctostaphylos
glandulosa ssp. glandulosa ”cushingiana” Non-glandular
Eastwood’s Manzanita
Arctostaphylos
glandulosa ssp. glandulosa Eastwood’s
Manzanita
Arctostaphylos
(hookeri ssp.) montana Mt. Tamalpais
Manzanita (on serpentine) LIST1B.3
Arctostaphylos
nummularia var. sensitiva
Shatterberry Manzanita
Rhododendron
occidentale Western
Azalea
Vaccinium ovatum Huckleberry
EUPHORBIACAE (EUPHORBIA FAMILY)
Croton
setigerus Doveweed
FABACEAE (PEA FAMILY)
Amorpha
californica var. napensis False
Indigo (can’t remember where) LIST1B.2
Astragalus
breweri Brewer's
Milk Vetch (Rock Spring) LIST 4.2
Astragalus
gambelianus var. gambelianus Gambel's
Locoweed
Astragalus
gambelianus var. elmeri Lg.-
flower Gambel's Locoweed
Hoita
macrostachya IndianHemp
(E. of Cataract trail)
Hoita
orbicularis Round-leafled
Scurf-pea (E. of Cataract trail
Lathyrus
vestitus var. vestitus Hillside
Pea
Lotus
formosissimus Coast
Lotus, Witches' Teeth LIST4.2
Lotus
humistratus Colchita,
Hairy Lotus
Lotus
micranthus Small-flowered
Lotus
Lotus
pinnatus Water-loving
Lotus (Potrero Meadow)
Lotus
purshianus Spanish-
clover
Lotus
wrangelianus Subpinnate
Lotus
Pickeringia
montana Chaparral
Pea (Mountain Theatre)
Spartium
junceum Sanpish
Broom *
Thermopsis
californica False
Lupine, Golden Banner
Trifolium
albopurpureum var. albopurpureum Common
Indian Clover
Trifolium
albo-purpureum var. dichotomum White-tipped
Indian Clover
Trifolium
barbigerum var. barbigerum Bearded
Clover
Trifolium
microcephalum Maiden
Clover
Trifolium
microdon Cup
Clover
Trifolium
variegatum (small & medium-flowered
vars.) White-tip Clover
Trifolium
willdenovii Tomcat
Clover
Trifolium
wormskioldii Cow
Clover
Vicia
americana var. americana American
Vetch
FAGACEAE (OAK/BEECH FAMILY)
Chrysolepis
chrysophylla var. chrysophylla Golden
Chinquapin (as trees on Benstein trail)
Notholithocarpus
densiflorus var. densiflorus Tanbark
Oak
Quercus
agrifolia var. agrifolia Coast
Live Oak
Quercus
chrysolepis Canyon
Live Oak
Quercus
durata Leather
Oak
Quercus
kelloggii California
Black Oak
Quercus
parvula var. shrevei Shreve's
Oak (Potrero picnic area) LIST4 (?)
Quercus
wislizeni
Interior Live- Oak (usually shrubby)
Quercus X
garryana Hybrid
on Simmons trail
Quercus x
morehus Oracle
Oak (kelloggii and wislizenii)
GARRYACEAE (SILK TASSEL FAMILY)
Garrya
elliptica Lowland
Silk Tassel Bush
GENTIANACEAE (GENTIAN FAMILY)
Centaurium
(Zeltnera trichantha ) trichanthum
“Alkali” Centaury, Barth’s retreat
Cicendia
quadrangularis Tiny
Timwort
HYDROPHYLLACEAE (WATERLEAF FAMILY)
Eriodictyon
californicum Yerba
Santa
Nemophila
menziesii Baby-blue-eyes
Nemophila
parviflora
Woodland Nemophila
` Phacelia
californica Purple-flowered
perennial phacelia
Phacelia
imbricata or P. egena White-flowered
perennial Phacelia
HYPERICACEAE/ CLUSIACEAE (ST. JOHN'S WORT FAMILY)
Hypericum
anagalloides Tinker's
Penny
Hypericum
concinnum Gold
Wire
Hypericum
formosum var. scouleri Marsh
St. Johnswort
IRIDACEAE (IRIS FAMILY)
Iris
douglasiana var. major Inland
Douglas Iris
Iris
macrosiphon Ground
Iris
Sisyrinchium
bellum Blue-eyed
Grass
ISOETACEAE (QUILLWORT FAMILY)
Isoetes
nuttallii Grassland
Seep Quillwort (Barth’s retreat)
JUNCACEAE (RUSH FAMILY)
Juncus
arcticus ssp. balticus Wiry
Rush
Juncus
bufonius var. bufonius Toad
Rush
Juncus
covillei var. covillei Long-fruited
Rush (locally rare, Rifle camp)
Juncus
effusus Green
Rush
Juncus
tenuis var. occidentalis Western
Rush
Juncus
patens Blue-green
Rush
Juncus
xiphioides Iris-leaved
Rush
Luzula
comosa Woodland
Wood-rush
JUNCAGINACEAE (ARROWGRASS FAMILY)
Lilaea
scilloides Flowering
Quillwort
LAMIACEAE/LABIATAE (MINT FAMILY)
Clinopodium
douglasii Yerba
Buena
Monardella
purpurea Serpentine
Monardella
Monardella
villosa ssp. villosa Western
Penny -royal
Prunella
vulgaris var. lanceolata Selfheal
(blue, large flowers)
Stachys (ajugoides var.) rigida Woodland
Hedge-nettle
Stachys
pycnantha Serpentine
Hedge-nettle
LAURACEAE (LAUREL FAMILY)
Umbellularia
californica California
Bay
LILIACEAE (LILY FAMILY) sensu lato
Allium
amplectens Paper
Onion
Allium
falcifolium Sickleleaf
Onion (Mountain theatre)
Allium
unifolium Pink
Onion (Potrero)
Brodiaea
elegans ssp. elegans Harvest
Brodiaea
Calochortus
luteus Yellow
Mariposa
Calochortus
umbellatus Oakland
Star-tulip LIST
4.2
Calochortus
uniflorus Marsh
Star-tulip (Barth’s Retreat)
Chlorogalum
pomeridianum var. pomeridianum Soap
Plant
Dichelostemaa
capitatum Bluedicks
Dichelostemma
congestum Ookow
Fritillaria
affinis var. affinis Mission
Bells
Lilium
pardalinum ssp. pardalinum California
Leopard Lily (Rifle Camp, Potrero, etc.)
Prosartes
hookeri Green
Fairy Bells
Smilacina
stellata (Maianthemum stellatum) Slender
Solomon-seal
Toxicoscordion
fontanum Marsh Zigadene LIST 4.2
Trillium
ovatum ssp. ovatum Pedunculate
Wake-robin
Triteleia
hyacinthina White
Brodiaea
Triteleia
laxa Ithuriels’
Spear
Triteleia
peduncularis Long-rayed
Brodiaea (Potrero)
LINACEAE (FLAX FAMILY)
Hesperolinon
micranthum Chaparral
Flax (Mountain theatre)
MALVACEAE (MALLOW FAMILY)
Sidalcea
malviflora ssp. malviflora Checker-bloom
MYRICACEAE (BAYBERRY FAMILY)
Morella
californica California
Wax-myrtle
ONAGRACEAE (EVENING PRIMROSE FAMILY)
Camissonia
ovata Grassland
Sun-cups
Clarkia
gracilis ssp. gracilis Serpentine
Godetia (Rock Spring)
Clarkia
purpurea ssp. quadrivulnera Small-flowered
Winecup Godetia
Epilobium
brachycarpum Short-fruit
Willowherb
Epilobium
minutum Small
Willow-herb
ORCHIDACEAE (ORCHID FAMILY)
Calypso
bulbosa Calypso
Orchid
Corallorhiza
maculata var. maculata Spotted
Coralroot
Goodyera
oblongifolia Rattlesnake
Plantain (Cataract trail)
Piperia
transversa Transverse-spur
Rein Orchid
Platanthera
leucostachys White
Marsh Orchid (Rifle Camp)
Spiranthes
porrifolia Western
Ladies' Tresses (Rifle Camp)
OROBANCHACEAE (BROOMRAPE FAMILY)
Orobanche
fasciculata Clustered
Broomrape (Mountain Theatre)
PAPAVERACEAE (POPPY FAMILY)
Eschscholzia
californica California
poppy
PHILADELPHACEAE (MOCK-ORANGE FAMILY)
Whipplea
modesta Modesty
PINACEAE (PINE FAMILY)
Pinus sp. Pine,
(Barth’s retreat)
Pseudotsuga
menziesii var. menziesii Douglas-fir
PLANTAGINACEAE (PLANTAIN FAMILY)
Plantago
erecta Dwarf
Plantain
Plantago
subnuda Large-leaved
Plantain
POACEAE/GRAMINEAE (GRASS FAMILY)
Aira
caryophyllea Annual
Hairgrass *
Bromus
carinatus var. carinatus California
Brome
Bromus
laevipes Woodland
Brome
Calamagrostis
ophitidis Serpentine
Reedgrass LIST 4.3
Danthonia
californica var. californica Ca.
Oatgrass
Deschampsia
cespitosa ssp. cespitosa Tufted
Hairgrass (Rifle Camp/ Potrero)
Deschampsia
elongata Hairgrass
Elymus
glaucus Wild-rye
Elymus
multisetus Big
Squirreltail
Festuca
arundinacea Reedgrass *
Festuca
californica California
Fescue
Festuca
idahoensis Idaho
Fescue
Festuca
occidentalis Western
Fescue
Festuca
rubra Red
Fescue
Hierochloe
occidentalis Vanilla
Grass
Koeleria
macrantha June
Grass
Melica
geyeri Melicgrass
Melica
torreyana Slender
Melicgrass
Nassella
lepida Slender
Needlegrass
Nassella
pulchra Purple
Needlegrass
Panicum
(Dichanthelium) acuminatum var. acuminatum Western
Panic Grass
Phalaris
aquatica Harding
Grass (Rifle camp meadow) *
Phalaris
californica California
Canarygrass
Poa secunda
ssp. secunda Early
Bluegrass, Malpais Bluegrass
Scribneria
bolanderi Scribner's
grass
Trisetum
canescens Tall
Trisetum
Vulpia
microstachys Native
Annual Fescue
POLEMONIACEAE
(GILIA/PHLOX FAMILY)
Collomia
heterophylla Little
Pink Collomia
Gilia
clivorum Small-flowered
Gilia
Leptosiphon
parviflorus White
Variable Linanthus
Navarretia
intertexta ssp. intertexta Spiny
Navarretia (Rifle Camp and Potrero)
Navarretia
mellita Honey-
scented Navarretia (sandstone chaparral)
Navarretia
squarrosa Skunk-scented
Navarretia (seasonally-moist areas)
Navarretia
rosulata Marin
County Navarretia (Barth’s Retreat) LIST1B.2
POLYGALACEAE (MILKWORT FAMILY)
Polygala
californica Milkwort
POLYGONACEAE (BUCKWHEAT FAMILY)
Chorizanthe
polygonoides var. polygonoides Knotweed
Spineflower
Eriogonum
luteolum Annual
pink-Buckwheat (close to Tiburon var.)
Eriogonum
nudum var. nudum Perennial
pink –flowered Buckwheat
Rumex
occidentalis Large
Dock (Potrero)
POLYPODIACEAE (FERN FAMILY)
Polypodium
calirhiza Common
Polypody Fern
PORTULACACEAE (PURSLANE FAMILY)
Calandrinia
ciliata Red
Maids
Claytonia
exigua ssp. exigua Linear-leaved
Claytonia (Rock Spring)
Claytonia
perfoliata Miners’
Lettuce
Montia
fontana Water
Montia/ Blinks
PRIMULACEAE (PRIMROSE FAMILY)
Anagallis
arvensis Scarlet
Pimpernel
Centunculus
minimus Chaffweed
Dodecatheon
hendersonii Shooting
Star
Trientalis
latifolia Star-flower
PTERIDACEAE (BRAKEFERN FAMILY)
Aspidotis
carlotta-halliae Carlotta
Hall’s Lace -fern (Mountain theatre) LIST 4.2
Aspidotis
densa Serpentine
Fern (other serpentine areas)
Cheilanthes
gracillima Slender
Lip-fern (N. Barth’s retreat )
Cheilanthes
intertexta Coastal
Lip-fern
Pellaea
andromedifolia Coffee
Fern
Pellaea
mucronata Birdfoot
Fern
Pentagramma
triangularis Goldback
Fern
RANUNCULACEAE (BUTTERCUP/CROWFOOT FAMILY)
Aquilegia
formosa Red
Columbine
Delphinium
hesperium Western
Larkspur (Rifle Camp)
Delphinium
nudicaule Red
Larkspur
Ranunculus
californicus California
Buttercup
Thalictrum
polycarpum
Meadow Rue (Rifle camp)
RHAMNACEAE (BUCKTHORN FAMILY)
Ceanothus
cuneatus var. cuneatus Buck
Brush
Ceanothus
foliosus var. foliosus Indigo
Bush
Ceanothus
jepsonii var. jepsonii Musk
Bush
Ceanothus
cuneatus X jepsoni False
“Mason's” or false “Monterey” Ceanothus
Frangula
californica Coffee
Berry
ROSACEAE (ROSE FAMILY)
Adenostoma
fasciculatum Chamise
Fragaria
vesca Wild
Strawberry
Heteromeles
arbutifolia Toyon,
Christmas-berry
Holodiscus
discolor Ocean
Spray
Rosa sp.?
californica or spithamea Wild
Rose (S.E. Rifle Camp)
Rosa
gymnocarpa Wood
Rose
RUBIACEAE (MADDER FAMILY)
Galium
californicum ssp. californicum Hairy
Bedstraw
Galium
parisiense Annual
Bedstraw *
Galium
porrigens var. porrigens Climbing
Bedstraw
Galium
triflorum Sweet-scented
Forest Bedstraw
SALICACEAE (WILLOW FAMILY)
Salix
lasiolepis var. lasiolepis Arroyo
Willow
SAXIFRAGACEAE (SAXIFRAGE FAMILY)
Lithophragma
affine Woodland
Star
SCROPHULARIACEAE (FIGWORT FAMILY)
Castilleja
densiflora ssp. densiflora Common
Owl's Clover
Castilleja
foliolosa Chaparral
Paintbrush
Collinsia
sparsiflora (parviflora) var. collina Small-flowered
Collinsia (Rock Spring)
Gratiola
ebracteata Vernal
Pool Hedge-hyssop (Rifle camp)
Keckiella
corymbosa Red
Woody Pentstemon (Mountain Theatre)
Mimulus
aurantiacus Sticky
Bush Monkeyflower
Mimulus
douglasii Chinless
Monkeyflower (Rock Spring)
Mimulus
guttatus Perennial
Yellow Monkeyflower
Pedicularis
densiflora Indian
Warrior
Triphysaria
pusilla Insignificant
Owl's Clover
Veronica
americana American
Brooklime
SELAGINELLACEAE (MOSS FERN FAMILY)
Selaginella
wallacei Wallace’s
Moss Fern
SOLANACEAE (NIGHTSHADE FAMILY)
Datura
stramonium Jimson
Weed *
TAXACEAE (YEW FAMILY)
Torreya
calfornia California
Nutmeg
TAXODIACEAE (REDWOOD FAMILY)
Sequoia
sempervirens Coast
Redwood (Potrero picnic area)
URTICACEAE (NETTLE FAMILY)
Hesperocnide
tenella Western
Slender Nettle
Urtica
dioica ssp. holosericea Stinging
Nettle
VALERIANACEAE (VALERIAN FAMILY)
Plectritis
brachystemon Small-flowered
Plectritis
VIOLACEAE (VIOLET FAMILY)
Viola
adunca Blue
Violet (Potrero)
Viola
purpurea ssp. quercetorum Mountain
Violet (Mountain Theatre, E. Rifle Camp)
Viola
sempervirens Redwood
Violet
VISCACEAE (MISTLETOE FAMILY)
Phoradendron densum Sargent
Cypress Mistletoe
Notes
* Non-native
plants or natives planted out of natural native location.
List 1B.1 or .2 Listed,
2001, in the C.N.P.S. Inventory of Rare & Endangered Plants, highest
priority.
List 3 Listed
as plants about which more information is needed.
List 4 Listed
as plants of limited distribution.