Photos / Sounds
What
Pondweeds (Genus Potamogeton)Observer
emwestDescription
Mostly submerged, much-branched stems. Submerged leaves linear, 1-2cm long, 1-2mm wide. Emergent leaves +/-2cm long, 1cm wide. no visible glands at nodes; fruit appears lenticular w/small wing but may be immature. Growing in Alpine Lake, on shore below Azalea Hill
Photos / Sounds
What
Fennel-leaf Pondweed (Stuckenia pectinata)Observer
emwestDescription
Submerged/floating, wispy plant with wiry stem; linear, thread-like leaves, 10-20cm long, <1mm wide, fruits fat, brown in interrupted terminal whorls. Growing in Alpine Lake, at the entrance to Bullfrog Creek
Photos / Sounds
What
Fuller's Teasel (Dipsacus sativus)Observer
emwestDescription
Growing at the northeast base of Bon Tempe Dam. Rectangular area, 25x10m, oriented NE-SW, with approximately 5% cover.
Photos / Sounds
What
Cheatgrass (Bromus tectorum)Observer
emwestPlace
Marin Municipal Water District Watershed, Marin County, Golden Gate National Recreation Area, US-CA, US (Google, OSM)Description
Sparse patch 11-100 individuals, fruiting
Photos / Sounds
What
Cheatgrass (Bromus tectorum)Observer
emwestPlace
Marin Municipal Water District Watershed, Marin County, Golden Gate National Recreation Area, US-CA, US (Google, OSM)Description
100-1000 individuals, fruiting, hand pulled on 6/9/16.
Photos / Sounds
What
Medusa Head (Taeniatherum caput-medusae)Observer
emwestDescription
Growing on mid-lower slope of Bon Tempe Dam, at interface of annual grassland and wet drainage area. Plants in seed, majority have not dropped. <5m radius, cover<5%
Photos / Sounds
What
Western Ladies' Tresses (Spiranthes porrifolia)Observer
emwestDescription
Flowers cream colored, spirally arranged, spur absent; basal leaves present but withered in flower. Growing along swimmers' trail by Azalea Hill.
Photos / Sounds
What
Frémont's Silktassel (Garrya fremontii)Observer
emwestPlace
Mount Tamalpais, Marin Municipal Water District Watershed, Marin County, US-CA, US (Google, OSM)Description
Plant >10ft, many stemmed; leaves rigid, margins entire (not wavy) upperside glabrous, underside with sparse white hairs; male and female plants present. Growing on the north side of Ridgecrest Blvd west of Middle Peak.
Photos / Sounds
What
Roses (Genus Rosa)Observer
emwestDescription
Shrub to 8' tall; flower white, aromatic; spines recurved, leaves compound pinnate, winged stipules. Growing along Bon Tempe Dam Rd,
Photos / Sounds
What
Knotweed Spineflower (Chorizanthe polygonoides var. polygonoides)Observer
emwestDescription
Plant <1", annual, prostrate; flowers reduced, white, with spiny modified bracts 3-5; plant turning dark red with age. Growing in rocky barren west of junction of Pine Mountain Rd and San Geronimo Ridge Rd.
