Floristics of Pavement Plains of the San Bernadino Mountains

Phytopsychology of Pavement Plains in the San Bernadino Mountains

“…Litter cover and depth were recorded in each quadrat as well. and Wilson (1978) reported 31 species on these pavement plains. The flora is now revised to 33 species; 20 perennials and 13 annuals (Derby 1979).…”

“…Sitanion hystrix like Artemisia was found only at Arrastre Flat, but appeared frequently enough in phytosociologic sampling there to rate an importance value , and thus was added to the flora. Artemisia tridentata reported by Derby and Wilson (1978) has been determined to be a Strong similarities among the three study sites exist in frequencies of the surface pavement rock component and the ratio of living vegetation to litter present (Table 1) . The greatest difference between sites is in percent frequency of bare soil.…”

“…The three pavement plains selected for study: 1) Sawmill , 2) Van Duesen and 3) Arrastre Flat represent the triangular center of the geographic range for pavement plains (Derby and Wilson 1978). Distinctive physical features of pavement plains are vegetation physiognomy, soil color and texture , and a surface pavement of Saragosa Quartzite.…”

“…Pavement plains in the San Bernardino Mountains are floristically and physiognomically unique (Derby and Wilson 1978). Quantitative sampling now allows the phytosociologic similarities among pavements to be examined (Derby 1979) and correlated with physical site characteristics .…”

Vascular flora of the Liebre Mountains, western Transverse Ranges, California

“…By far the best-documented element of the Transverse Ranges has been the Santa Monica Mountains, which have been comprehensively covered by Raven et al (1986). While the body of floristic literature for the Transverse Ranges is certainly augmented by more narrowly focused local studies (e.g., Derby andWilson 1978, 1979; Lewis and Gause 1966;Muns 1984Muns , 1985aMuns , 1985bMuns , 1986Muns , 1992Muns , 1994Parish 1890;Sawyer 1987;Swinney 1994) and unpublished technical reports and dissertations (Boyd et al 1993;Krantz 1994;Mistretta 1995;Robinson 1953;Thome 1971Thome -1973, many segments of the range remain virtual floristic terra incognita.…”