Saturday, June 24, 2017

A new metric of floristic botany

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Astronomers are not want to utilize relative measures: astronomical units, a measure of apparent brightness magnitude adjusted for distance...
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Tuesday, June 20, 2017

Ackerson Meadow acquisition adds only 4 vascular plants to the Yosemite National Park Flora?

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In 2015, Yosemite National Park moved to acquire 415 acres at Ackerson Meadow, adjacent to the western Park boundary in Tuolumne County (in...
Tuesday, January 17, 2017

Minority opinion on classification of Ponderosa Pine

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The recent study of Willyard et al (2017) on lineages of Ponderosa Pine ( Pinus ponderosa ) is important and at the same time highly proble...
Wednesday, December 16, 2015

Horkelia marinensis in Santa Cruz County - self-compatible?

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Horkelia marinensis is a California endemic, endangered plant known from limited geographic regions along the California coast.  At the so...
Wednesday, October 7, 2015

David Douglas in California, and the type of the Santa Cruz Tarplant (Holocarpha macradenia)

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Type stations are vague: many type specimens of California endemic plants collected long ago cannot be attributed to a specific date or spe...
Tuesday, October 6, 2015

Plants that merit California Rare Plant Rank Status

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Presently, 2345 plants enjoy California Rare Plant Rank (CRPR) status.  Status review for new additions proceeds at a pace of 30-40 taxa ye...
Friday, July 3, 2015

California Botany Batting Average

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The Consortium of California Herbaria database continues to grow.  The rate plot shown below suggests that for the past year the rate of ad...