166 University of California Publications in Botany. [VOL. 3 



Calif.), but that is a species of Mexico, far beyond our limits. 

 The form in which the pappus-awn is wanting is the var. nuda of 

 Gray (=P. nuda Torr.). Both forms occur throughout the 

 range of the species. P. Greenei Rose, of Santa Cruz and Cedros 

 islands, etc., is an indistinguishable form. Ace. to Greene it is 

 strongly aromatic. Dr. Rose has also described (Bot. Gaz. xv. 

 117) as P. Emoryi var. Orcuttii "a slender form with small 

 leaves, achenes with small crown or none, and often with faces 

 quite pubescent" from material collected at Cantillas, Lower 

 California. 



P. PLUMIGERA Gray, PI. Fendl. 77 (1849). Leaves small: 

 heads narrow, barely 6 mm. high : awn solitary, longer than the 

 achene. Known only from Coulter's ' * Calif ornian collection," 

 but it is probable (ace. to Gray) that the specimens were gath- 

 ered in Arizona. Perhaps only a form of P. Calif ornica. 



P. LEPTOGLOSSA Gray, 1. c. Leaves 1.2 to 2 cm. long : heads 1 

 cm. high, witfy rays 8 mm. long: disk-corollas with very slender 

 tube and long and narrow cylindrical throat : awn solitary, longer 

 than the achene, exceeded by the disk-corolla. Likewise reported 

 from California, Coulter, but probably Arizonan, or more likely 

 only Mexican. Dr. Rose 43 reports that there is a specimen in the 

 U. S. National Herbarium from Guaymas, Mexico, collected by 

 Dr. Palmer in 1869. 



P. ROTUNDIFOLIA Brandegee, Zoe iv. 210 (1893). Amauria ro- 

 tundifolia Benth., Bot. Sulph. 31 (1844). Perityle Fitchii Torr.. 

 Pacif. R. Report, iv. pt. 5, 100 (1857) ; Brandegee, Proc. Calif. 

 Acad. ser. 2, ii. 177 (1889); Rose, Bot. Gaz. xv. 113 (1890). 

 Laphamia peninsularis Greene, Bull. Calif. Acad. i. 8 (1884). 

 Best distinguished by its 4-angled achenes ; the faces smooth, the 

 angles slightly hirsute with straight appressed hairs. "Califor- 

 nia, Rev. A. Fitch," according to the label. Since it has been 

 frequently collected in Lower California but not again reported 

 from upper California, it seems very unlikely that it occurs 

 within our limits. 



43 Bot. Gaz. xv. 118 (1890). 



