Weed list

Major weeds in the GOG are (with their current status):


Eudicots:

Amaranthaceae, Amaranth Family

• (Red-root pigweed, Amaranthus retroflexus, extremely abundant in beds last warm season, but not yet present in March)

Asteraceae, Sunflower Family

• Bristly Ox-tongue, Picris echinoides, occasional seedlings in beds
• Common groundsel, Senecio vulgaris, occasional in beds, extremely common in periphery, currently as seedlings and also adults flowering
• Prickly Lettuce, Lactuca serriola, widespread in beds, closely resembling a lettuce seedling (actually left in place by weeding personnel in the lettuce beds), as of 13Mar11 seedlings with about 3 true leaves
• (Yellow Starthistle, Centaurea solstitialis, a few plants were seen last year in the vicinity of bed E1, not yet seen as of March)

Brassicaceae, Mustard Family

• Charlock, Sinapis arvensis, a large mass of full-flowering individuals to the east of the fire pit
• Shepard's Purse, Capsella bursa-pastoris, only one plant seen on N end of beds, in flower and fruit

Caryophyllaceae, Pink Family

• Chickweed, Stellaria media, seedlings scarce but adults plentiful and flowering and seeding, mostly peripherally

Convolvulaceae, Morning-Glory Family

• Field bindweed, Convolvulus arvensis, both perennial shoots and seedlings widespread

Fabaceae, Pea Family

• California burclover, Medicago polymorpha, (ID provisional) starting to germinate in several beds (as of 13Mar11)

Geraniaceae, Geranium Family

• Storksbill, Erodium cicutarium, extremely abundant to the north of the bed area, currently not in flower

Lamiaceae, Mint Family

• Henbit, Lamium amplexicaule, very few adults but seedlings dominate the seedling weeds, adults flowering

Malvaceae, Mallow Family

• Cheeseweed, Malva parviflora, seedlings scarce but adults dominating the weed biomass

Oxaliadaceae, Wood Sorrel Family

• Creeping woodsorrel, Oxalis corniculata, mostly newly germinated seedlings, esp in the GOG auxiliary

Polygonaceae, Buckwheat Family

• Prostrate knotweed, Polygonum aviculare, mostly seedlings (UCIPM lists as P. arenastrum, which is now a synonym of P. aviculare subsp. depressum in Jepson Manual 2nd ed.)

Urticaceae, Nettle Family

• Dwarf Nettle, Urtica urens, infrequent in beds

Monocots:

Poaceae, Grass Family

• Annual bluegrass, Poa annua, seedlings and adults widespread, adults reproductive
• (Crabgrass, Digitaria sanguinalis, common on periphery in the bed AB9 area, seen last year)
• Wild oat, Avena fatua (ID provisional), adults growing among the charlock