Italian Buckthorn 
Family Rhamnaceae (buckthorn)
Rhamnus alaternus 

This evergreen shrub has an irregular upright form with a dense canopy. Medium height about 5-7 meters with a spread of about 5 meters.  Leaves are dark green, serrated, glossy,  and oval about 5 cm in length.  It is valued as a tough, low-maintenance street tree. Appropriate beneath overhead wires. Disease and pest resistant and attracts birds

Blue Pennyroyal
Family Lamiacea (mint) 
Mentha pulegium

This European native mint is common throughout the Bay Area in low areas that are marshy all winter, but dry in summer.  It is a low-lying plant with small oval or elliptical leaves. In late summer, its deep lavender purple pom-pom like flowers gives color to the marsh. The leaves may be used in stuffing or boiled to make tea.  No parts of this plant should be eaten by pregnant women because it is an abortive.

Apricot
Family Rosaceae (rose)
Prunus armeniaca

The old apricot trees at the north end of the Lagoon are remnants of  a commercial orchard that once occupied this site.  Apricots provide food for wildlife, including raccoons, opossums, and house finches.  This tree is no longer living.

Yellow and Red Myrobalan, Cherry Plum
Family Rosaceae (rose)
Prunus cerasifera

Myrobalan plants are some of the largest and most vigorous of the plum or prune woodstocks.  Their wood is hard and long lived.  Commercial fruit trees would be grafted onto this tree because they are more resistant than the preferred fruit. Cultivated cherry plums can have fruits, foliage, and flowers in any of several colours. Some varieties have sweet fruits that can be eaten fresh, while others are sour and better for making jam.

Himalayan Blackberry   
Family  Rosaceae (rose)
Rubus armeniacus

This non-native woody shrub is found in woodlands, marshes, riparian areas, and parks. It is native to Armenia and Northern Iran.  It looks similar to the California blackberry except for leaf shape and thorns.  The stems bear large, stout spines.  Its leaves are divided into 5 large leaflets that are silvery on the underside.  Rubus armeniacus occurs in California in the coast ranges, Central Valley, and Sierra Nevada. This weed is a strong competitor. It rapidly displaces native plant species and thickets to produce such a dense canopy that the lack of light limits the growth of other plants. This species is originally from Eurasia, and is very aggressive in its spread, growing up to 10 feet per year.  The flowers are white to pinkish.  This was formally call Rubus discolor.