Type specimens of many California endemics described in the 1850s are often uncertain. in the instance of Torreya californica , the NY hol...

Based on tally of 1.3 million specimens, the 10 most well collected California species are:   Taxon # sheets ...

Toxicodendron diversilobum. Rhus diversilola, Torr. & Gray, FL i 218. E.L. Greene had the facility to view specimens, and immediate...

Peterson PM, Romaschenko K, Soreng RJ, Reyna JV (2019) A key to the North American genera of Stipeae (Poaceae, Pooideae) with descriptions...

This basionym was published in Konigliches Gymnasium zu Sorau, Beilage zum Jahresbericht. Sorau 7. 1911.   The protologue is apparently no...

E xtinction Density of World Flora Humphreys et al (2019) compiled a global roster of presumed extinct seed plants.   Their assessment...

Mahonia sonnei was named by Abrams (1934) based on a single gathering from Truckee, California.   The syntype specimens were collected by...