Wildflower Report, May 8, 2010
Maxwell-Sites Road, Sites-Ladoga Road, Lower Goat Mountain Road


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Maxwell-Sites Road

There are large patches of blue elderberry and California wildrose on the banks of Stone Corral Creek near the quarry. Both are in flower. This is also a place to see the effects of an invasive species on the native flora. It is evident that tamarisk has displaced wild rose on some areas of the bank. The process is probably continuing. Twining snakelily is not as easily seen, but it is growing along the creek upstream of the quarry.


Blue elderberry, Sambucus mexicana (left); California wildrose, Rosa californica (rt)

Twining snakelily, Dichelostemma volubile

Sites-Lodoga Road

Wooly sunflowers and white-whorled lupines, both with bright yellow flowers, are easily spotted all along the road. Narrow leaf mules ear has even larger yellow flowers, but is not so common. Many of the flowering stalks on the lupines have bent into a nearly horizontal position and the pedicels of the flowers and developing seed pods have elongated to bring them into alignment with the upward facing flowers. This is common for this variety, densiflorus, of this species, Lupinus microcarpus. Another variety, microcarpus, is also flowering along the road. It has purple flowers and the inflorescences maintain their vertical growth and radial symmetry. Winecup clarkia and jeweled onion are two of the flowers that have only recently started to bloom. They are plants of the oak woodlands and open grasslands. Yerba santa is common along the road. It is shrub that is favored by disturbance. Mulefat is growing in Grapevine Creek. It is most commonly seen growing in the gravel and rocks of creekbeds. Buckeye is also flowering on Grapevine Creek. It grows on shady hillsides too, but is not yet flowering in those less exposed locations.


Winecup clarkia, Clarkia purpurea (left);
White-whorled lupine, Lupinus microcarpus var densiflorus (right)

Narrow leaf mule ears, Wyethia angustifolia

Valley lupine, Lupinus microcarpus var microcarpus (left);
Jeweled onion, Allium serra (right)

Yerba santa, Eriodictyon californicum (left);
California buckeye, Aesculus californica (right)

Mule fat, Baccharis salicifolia: 104

Lower Goat Mountain Road

Traveling uphill from the Lodoga-Stonyford Road, Goat Mountain Road passes through soils that have weathered from the sandstones and shales typical of the lower hills, then through soils that have developed on basalts of the Stonyford volcanic complex, and on into the serpentine soils. The vegetation changes are quite evident. Bluehead gilia, the tiny Bolander’s linanthus, forest clarkia, and whiskerbrush were growing only on the volcanic soils. Chaparral clarkia, yellow Mariposa lily, hayfield tarweed, and wooly sunflower were on serpentine alluvium. Snowbell and mulefat were along the creek. Red ribbons and long tubed iris were growing on steep serpentine road cuts. Mariposa lilies and tarweeds are widespread in the grasslands; they are just now starting to flower.

Forest clarkia, Clarkia rhomboidea (left); Bluehead gilia, Gilia capitata (right)


Bolander’s linanthus, Linanthus bolanderi (left);
Yellow mariposa lily, Calochortus luteus (right)


Evening snow, Linanthus dichotomus (left); Chaparral clarkia, Clarkia affinis (center); Whiskerbrush, Linanthus ciliatus (right)


Hayfield tarweed, Hemizonia congesta (left); Wooly sunflower, Eriophyllum lanatum (center); Mule fat, Baccharis salicifolia (right)


California snowbell, Styrax redivivus (left, center); Red ribbons, Clarkia concinna (rt)


Long tubed iris, Iris macrosiphon (left); Red ribbons, Clarkia concinna, and Long tubed iris, Iris macrosiphon (right)


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