las posas soils

Listing 1 - 2 from 2 for las posas soils

San Marcos Vernal Pool Checklist
... San Diego thornmint (Acanthomintha ilicifolia), a rare herb in the mint family (Lamiaceae) found in clay soils near the San Marcos vernal pools. This endemic species has been extirpated from many areas of ... during the past two decades, mostly due to the construction of extensive housing developments on Las Posas soils. Both species are on the CNPS List 1B: Rare, threatened and endangered. They are ...
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San Marcos Mountains
... Mountains are composed of San Marcos gabbro, a dark, basic intrusive rock that weathers into reddish Las Posas clay. It contains a high iron and magnesium content compared with light-colored granites and ... Of The Strawberry Tree Tetracoccus dioicus (Euphorbiaceae), a dioecious shrub that typically grows on Las Posas soils in San Diego County. The leaves are opposite or 3-whorled with linear or ...
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