620 maxon: a new polystichum 



REFERENCES 



Cosmos sulphureus Cavanilles, Icon. PL 1: 56, pi. 79. 1791. 

 Rose, Gard. & For. 8 : 484, fig. 66. 1895. 



Coreopsis artemisiaefolia Jacquin, Icon. PI. Rar. 595; Col. 

 Suppl. 155. 1791. 



Xochipalli . . . folia f evens sinuosa, magna, et Artemisiae 

 quadantenus similia. Hernandez, in Nard. Anton. Recchi, 

 Rermn Medic. Nov. Hisp. Lib. 7, Cap. 36. 1651. 



In the accompanying illustration (fig. 2) the plant is shown, 

 slightly reduced, accompanied by drawings of a disk flower (a) 

 and an achene (b), the two latter enlarged about two diameters. 



BOTANY. — A new Polystichum from California.^ William R. 

 Maxon, National Museum. 



In reviewing recently the Polystichums of the Pacific coast 

 region of the United States as represented in the National Her- 

 barium and in the very ample collections of the Dudley Her- 

 barium of Leland Stanford Junior University, the latter lent 

 for study through the courtesy of Professor LeRoy Abrams of 

 that institution, it has been found that the plant of the Santa 

 Cruz peninsula and of two or three localities not far northward 

 which has commonly been referred to Polystichum aculeatum (or 

 formerly to its "var. angulare") represents a new species. This 

 is described below, being named in memory of the late William 

 R. Dudley, for many years professor of botany in Leland Stan- 

 ford Junior University. 



Polystichum Dudleyi Maxon, sp. nov. 



Rhizome stout, decumbent, together with the numerous stipe-bases 

 densely paleaceous, the inner basal scales mostly linear-lanceolate, 

 attenuate, dark brown, dull, semiopaque, imbricate, those above spread- 

 ing, larger and broader, narrowly oblong to ovate, long-acuminate, 

 up to 2 cm. long, brown to fulvous, concolorous, translucent, mem- 

 branous, distantly denticulate-ciliolate, extending well up the stipe 

 but mostly deciduous above the basal third, underlaid by a dense series 



1 Published with the permission of the Secretary of the Smithsonian Insti- 

 tution. 



