Serpentine Soil Communities of Marin County

Minuartia douglasii is a species of flowering plant in the pink family known by the common name Douglas' stitchwort. It is native to the chaparral and oak woodlands in much of California, southern Oregon, and parts of Arizona. It is an annual herb growing to a maximum height of 30 centimeters with a slender green or purplish stem which sometimes has thin branches. The threadlike, curling leaves may be up to 4 centimeters long but are... less ↑

Spergularia rubra, the red sand spurrey or red sandspurry, is a plant species in the pink family. It is native to Europe and Asia, and it is present on other continents, including North and South America and Australia, as an introduced species and in many areas a common weed. It grows in a wide variety of habitat types. It is an annual or perennial herb producing a slender, glandular stem up to about 25 centimeters long.... less ↑

Calandrinia ciliata is a species of flowering plant in the purslane family known by the common name fringed redmaids. It is native to western North America from British Columbia to New Mexico, where it is widespread and common. It can also be found in parts of Central and South America. This is an annual herb which varies greatly in size from a small patch a few centimeters wide to an erect form approaching 40 centimeters tall.... less ↑

Claytonia gypsophiloides is a species of wildflower in the purslane family known by the common names gypsum springbeauty and Coast Range claytonia. It is endemic to California, where it grows in the Coast Ranges from the North Coast Ranges to the Temblor Range. It can usually be found in moist areas with rocky soils, often serpentine. It is an annual herb producing an erect stem 15 to 25 centimeters in maximum height. The fleshy basal leaves... less ↑

Claytonia perfoliata (miner's lettuce, winter purslane, or Indian lettuce; syn. Montia perfoliata) is a fleshy annual plant native to the western mountain and coastal regions of North America from southernmost Alaska and central British Columbia south to Central America, but most common in California in the Sacramento and northern San Joaquin valleys. less ↑

Taraxacum officinale, the common dandelion (often simply called "dandelion"), is a flowering herbaceous perennial plant of the family Asteraceae (Compositae). It can be found growing in temperate regions of the world, in lawns, on roadsides, on disturbed banks and shores of water ways, and other areas with moist soils. T. officinale is considered a weed, especially in lawns and along roadsides, but it is sometimes used as a medical herb and in food preparation. Common dandelion... less ↑

Micropus californicus is a plant in the daisy family which is known by the common name slender cottonweed. Its flowerheads resemble very small cotton balls, often rounded with cottony white hairs forming the pappus of each seed. The individual plants are known more informally as Q-tips due to their resemblance to the cotton swabs. It is found mostly in California, and into Oregon and northern Baja California. This plant is a resident of the vernal pool... less ↑

Centaurea melitensis (called Maltese star thistle in Europe, tocalote or tocolote in western North America) is an annual plant of the Asteraceae, 1- 11 dm high, with resin-dotted leaves and spine-tipped phyllaries. This plant is native to the Mediterranean region of Europe and Africa. It was introduced to North America in the 18th Century; the first documented occurrence in California is in the adobe of a building constructed in San Fernando in 1797. It is also... less ↑

Wyethia glabra is a species of flowering plant in the aster family known by the common name Coast Range mule's ears. It is endemic to California, where it grows in the North and Central Coast Ranges. It is a perennial herb growing from a tough taproot and caudex unit and producing a stem up to 40 centimeters tall. It is hairless to hairy and glandular. The leaves have lance-shaped or oval blades up to 45 centimeters... less ↑

Hypochaeris radicata (sometimes spelled Hypochoeris radicata), also known as catsear, flatweed,cat's ear or false dandelion, is a perennial, low-lying edible herb often found in lawns. The plant is native to Europe, but has also been introduced to the Americas, Japan, Australia and New Zealand where it can be an invasive weed. It is listed as a noxious weed in Washington State, USA. less ↑

Achillea millefolium, known commonly as yarrow /ˈjæroʊ/ or common yarrow, is a flowering plant in the family Asteraceae. It is native to temperate regions of the Northern Hemisphere in Asia, Europe, and North America. In New Mexico and southern Colorado, it is called plumajillo (Spanish for 'little feather') from its leaf shape and texture. In antiquity, yarrow was known as herbal militaris, for its use in stanching the flow of blood from wounds. Other common names... less ↑

Agoseris grandiflora is a species of flowering plant in the daisy family known by the common names bigflower agoseris and grassland agoseris. It is native to western North America from British Columbia to California to Utah, where it grows in many habitat types. This is a perennial herb producing a basal patch of leaves of various shapes reaching maximum lengths of 50 centimeters. There is usually no stem, but there is sometimes a rudimentary one. The... less ↑

Anapahlis margaritacea, commonly known as the western pearly everlasting, is a flowering perennial plant in the Asteraceae family. Since it is the only North American species it is often simply called pearly everlasting in the United States and Canada. However, it is also native to Asia and has been widely introduced in Europe. It grows erect up to heights of about 1.2 meters and has narrow, alternate leaves. One salient feature is that the undersides of... less ↑

Sonchus oleraceus (common sowthistle,sow thistle,smooth sow thistle, annual sow thistle, hare's colwort, hare's thistle, milky tassel, swinies) is native to Asia and Europe. The Latin name Sonchus refers to the hollow stem, while oleraceus refers to its good taste. The common name sow thistle refers to its attractiveness to swine, and the similarity of the leaf to younger thistle plants. The common name hare's thistle refers to its beneficial effects and attractiveness for hare and rabbits. less ↑

The Common Woolly Sunflower (Eriophyllum lanatum), also known as Oregon Sunshine, is a widespread, herbaceous dicot of the sunflower family Asteraceae. It is native to western North America, commonly growing in many dry, open places below 10,000 ft, but it also grows on rocky slopes and bluffs. It is most common in California, but grows as far north as Vancouver, Canada. less ↑

Adenocaulon bicolor is a flowering plant in the daisy family known as American trailplant. It is found in southern Canada and across the northern and western United States. This plant has a very thin erect branching stem surrounded by triangular leaves only at the base. Upon the branches are tiny inflorescences of white flowers, each flower measuring only a few millimeters in width. Around each inflorescence grows a distinctive array of club-shaped fruits covered in tiny... less ↑

Lessingia micradenia is a rare species of flowering plant in the daisy family known by the common name Mt. Tamalpais lessingia. It is endemic to the San Francisco Bay Area of California, where it occurs in areas with serpentine soils. The species is divided into two rare varieties, each with a limited occurrence on opposite sides of the Bay Area. Lessingia micradenia var. glabrata is found in several locations across Santa Clara County south of San... less ↑

Heterotheca sessiliflora is a species of flowering plant in the daisy family known by the common name sessileflower false goldenaster. It is native to California and Baja California, where it grows in many types of habitat. This is a perennial herb which is quite variable in appearance, particularly across its four subspecies. It may be a small clumping or mat-forming plant or grow tall stems to heights exceeding a meter. It is coated in small bristles... less ↑

Erodium botrys is a species of flowering plant in the geranium family known by the common names long-beaked stork's bill and broadleaf filaree. This is a weedy annual herb which is native to much of Eurasia and North Africa but is found in many other areas of the world as an introduced species, including Australia, New Zealand, and parts of the Americas. The plant starts from a flat rosette of highly lobed green leaves on red... less ↑

Erodium cicutarium, also known as redstem filaree, common stork's-bill or pinweed, is a herbaceous annual – or in warm climates, biennial – member of the family Geraniaceae of flowering plants. It is native to the Mediterranean Basin and was introduced to North America in the eighteenth century, where it has since become invasive, particularly of the deserts and arid grasslands of the southwestern United States. less ↑

Clarkia gracilis is a species of wildflower known by the common name slender clarkia. This plant is native to the US states of California, Oregon, and Washington, where it is found in coastal, foothill, valley, and low-elevation mountain habitats. The plant is variable across subspecies but is generally an erect slender stem with a few sparse, narrow leaves several centimeters long. It bears an inflorescence of drooping buds which open into bowl-shaped flowers with pinkish lavender... less ↑

Quercus chrysolepis, commonly termed Canyon Live Oak, or Golden Cup Oak, is a species of evergreen oak that is found in the southwestern part of North America, notably in the California Coast Ranges. This tree is often found near creeks and drainage swales growing in moist cool microhabitats. Its leaves are a glossy dark green on the upper surface with prominent spines; a further rapid identification arises from the leaves of Canyon live oak being geometrically... less ↑

Quercus wislizeni, known by the common names Interior Live Oak, and Sierra Live Oak, is an evergeen oak, highly variable and often shrubby, found in areas of California in the United States. It also occurs south into northern Baja California in Mexico. It generally occurs in foothills, being most abundant in the lower altitudes of the Sierra Nevada, but also widespread in the Pacific Coast Ranges and the San Gabriel Mountains. It was named for its... less ↑

Notholithocarpus densiflorus, commonly known as the tanoak or tanbark-oak, is an evergreen tree in the beech family (Fagaceae), native to the western United States, in California as far south as the Transverse Ranges, north to southwest Oregon, and east in the Sierra Nevada. It can reach 40 m (130 ft) tall (though 15–25 m (49–82 ft) is more usual) in the California Coast Ranges, and can have a trunk diameter of 60–190 cm (24–75 in). less ↑

Alnus rhombifolia, the white alder, is an alder tree native to western North America, from British Columbia and Washington east to western Montana, southeast to the Sierra Nevada, and south through the Peninsular Ranges and Colorado Desert oases in Southern California. It occurs in riparian zone habitats at an altitudes range of 100–2,400 metres (330–7,900 ft). While not reported in northern Baja California, it has been predicted on the basis of its climatic adaptation to occur there less ↑

Corylus cornuta (Beaked Hazel) is a deciduous shrubby hazel found in most of North America, from southern Canada south to Georgia and California. It grows in dry woodlands and forest edges and can reach 4–8 metres (13–26 ft) tall with stems 10–25 centimetres (3.9–9.8 in) thick with smooth gray bark. The leaves are rounded oval, coarsely double-toothed, 5–11 centimetres (2.0–4.3 in) long and 3–8 centimetres (1.2–3.1 in) broad, with hairy undersides. The flowers are catkins that form in the fall... less ↑

Cynoglossum grande is a species of flowering plant in the borage family known by the common name Pacific hound's tongue. It is native to western North America from British Columbia to California, where it grows in shady areas in woodland and chaparral. On the forest floor of California oak woodlands typical plant associates are Calochortus luteus, Delphinium variegatum and Calochortus amabilis. It is a perennial herb producing an erect stem 30 to 90 centimeters tall from... less ↑

Myosotis latifolia is a species of forget-me-not known by the common name broadleaf forget-me-not. It is native to northwestern Africa, and it is known elsewhere as an introduced species, including the west coast of the United States. It grows in many types of habitat, including moist, shaded, disturbed areas. It is a perennial herb sometimes exceeding half a meter in height. The leaves are generally oval in shape, the largest at the woody base of the... less ↑

Orobanche fasciculata is a species of broomrape known by the common name clustered broomrape. It is native to much of western and central North America from Alaska to northern Mexico to the Great Lakes region, where it grows in many types of habitat. It is a parasite growing attached to the roots of other plants, usually members of the Asteraceae, such as Artemisia, Eriodictyon, and Eriogonum. This plant produces one or more stems from a thick... less ↑

Castilleja densiflora is a species of Indian paintbrush known by the common name denseflower Indian paintbrush. It is native to California and northern Baja California, where it grows in grassland and chaparral habitat. It is a variable species. It is generally 10 to 40 centimeters tall with linear or lance-shaped leaves up to 8 centimeters long, and with or without lobes. The inflorescence is as small as 3 centimeters or as long as 25 centimeters in... less ↑

Cordylanthus pilosus is a species of flowering plant in the broomrape family known by the common name hairy bird's beak. It is endemic to the mountain ranges and foothills of northern California, where it grows in woodland and chaparral habitat, often on serpentine soils. There are three subspecies, each mainly limited to a different section of mountains. In general this annual herb is erect and branching, reaching a maximum height anywhere between 20 centimeters and 1.2... less ↑

Mentha pulegium (pennyroyal or European pennyroyal, also called squaw mint, mosquito plant and pudding grass), is a species of flowering plant in the family Lamiaceae. Crushed pennyroyal leaves exhibit a very strong fragrance similar to spearmint. Pennyroyal is a traditional culinary herb, folk remedy, and abortifacient. The essential oil of pennyroyal is used in aromatherapy, and is also high in pulegone, a highly toxic volatile organic compound affecting liver and uterine function. less ↑

Phyla nodiflora (frog fruit, sawtooth fogfruit, turkey tangle), is an ornamental plant in the Verbenaceae family, and is native to South America and the United States. It can be found in tropical areas around the globe, a naturalized species in many places. This plant is cited in Flora Brasiliensis by Carl Friedrich Philipp von Martius. It is often grown as groundcover, and is sometimes present in yards as a lawn weed. less ↑

Collinsia heterophylla (syn. C. bicolor) is a flowering plant native to California and Baja California. It is known as Purple Chinese Houses or Innocence. Like the other species in the genus Collinsia, which also includes the Blue-eyed Marys, it gets its name from its towers of inflorescences, of decreasing diameter, which give the plants in full flower a certain resemblance to a pagoda. less ↑