214 GENUS CHRYSOTHAMNUS. 



mm., l-nerved, tomentulose; inflorescence compactly cymose, rounded, 2 to 5 cm. across; 

 involucre 7 to 10 mm. high; at least some of the bracts abruptly acute or cuspidate, 

 keeled, 5-rowed, the outer ones more or less glandular-puberulent ; corolla 8.5 to 10.5 mm. 

 long; tube only puberulent; lobes lanceolate-linear, about 2 mm. long; style-appendage 

 longer than the stigmatic part; achenes densely pubescent. (C. californicus var. occi- 

 dentalis Greene, Erythea 3:112, 1895, in part. C. occidentalis Greene, Fl. Fran. 369, 

 1897.) Inner Coast Ranges and Sierra Nevada Mountains of California. Type local- 

 ity, in the Coast Ranges of California, from Humboldt County southward and in the 

 mountains of southern California. Collections: Mount Eddy, Baker 3785 (UC); Grouse 

 Creek, Humboldt County, August 2, 1888, Chesnut and Drew (UC) ; South YoUa Bolla, 

 October, 1916, Merriam and Bailey (UC); Bloody Canon, Mono County, August 13, 

 1898, Congdon (DS) ; Kaweah River Basin, Hopping 52 (UC) ; Barton Flats, San Bernar- 

 dino Mountains, Wilder 597 (UC) ; Cleveland National Forest, San Jacinto Mountains, 

 de Forest 129 (S. F. office, U. S. Forest Service). 



\2i. Chrysothamnus nauseosus bernardinus (Hall). — Shrub probably low and with 

 erect stems but habit not well known; twigs. erect, simple, leafy, not striate, coated with 

 a smooth gray or white pannose tomentum; leaves ascending, linear, very acute, often 

 recurved at tip, 3 to 5 cm. long, 1 to 2 mm. wide, mostly conduplicate, l-nerved, green 

 and scabro-puberulent (white-tomentose in minor variation 51); inflorescence a loose 

 rounded cyme, 3 to 10 cm. across, the lower branches 2 to 10 cm. long; involucre 10 to 13 

 mm. high; bracts sharply acuminate, keeled, in well-defined ranks, glabrous or slightly 

 erose-ciliate or the outer ones obscurely puberulent (white-tomentose in minor variation 

 51); corolla 9 to 12 mm. long; tube sparsely crisp-puberulent ; lobes linear-lanceolate, 

 acute, 1.5 to 2.5 mm. long; style-appendage longer than the stigmatic part; achenes 

 densely sericeous-pubescent. (C nauseosus var. bernardinus Hall, Univ. Calif. Publ. 

 Bot. 7:171, 1919.) Mountains of southern California. Type locality, hillsides at 2,250 

 m. altitude. Bluff Lake, San Bernardino Mountains, California. Collections: Type col- 

 lection, September 2, 1905, Grinnell (UC); open pine woods near Acton, Los Angeles 

 County, August 24, 1893 (DS, ex herb. Hasse) ; above Aroyo Seco, West Fork Divide, 

 San Gabriel Mountains, September 4, 1915, Grinnell (SF); Pine Mountain Ridge, San 

 Antonio Mountains, California, Johnston 1652 (DS, UC); Round Valley, San Jacinto 

 Mountains, California, Hall S^l (UC, form with very compact cymes and elongated 

 anther-tips and style-appendages. Hall, 1. c). 



12j. Chrysothamnus nauseosus graveolens (Nuttall). — Shrub commonly 6 to 15 

 dm. high, robust, taller than broad, with erect branches; twigs erect, leafy, more or less 

 evidently striate, yellowish-green to nearly white with a compact smooth tomentum; 

 herbage mildly ill-scented; leaves broadly linear, 4 to 6 cm. long, 1 to 2 mm. wide, some 

 of them usually 3- or 5-nerved, impunctate, smooth and green but often slightly tomentu- 

 lose, especially beneath; inflorescence a round or flat-topped cyme, fastigiate, the heads 

 crowded, involucre 6 to 8 mm. high; bracts acute, keeled, in rather well-defined vertical 

 rows, glabrous; corolla 7 to 9 mm. long; tube puberulent or glabrous; lobes 0.5 to 1.5 mm. 

 long, erect; style-appendage longer than the stigmatic part; achenes densely pubescent. 

 {Chrysocoma graveolens Nuttall, Genera 2: 136, 1818.) On plains in only slightly alkaline 

 soil. North Dakota to Colorado, New Mexico, northern Arizona, Utah, and Idaho. Type 

 locality, on the banks of the Missouri, in denuded soils. Collections: Washington 

 County, North Dakota, August, 1886, Hatcher (UC); Platte Canon, Wyoming, Nelson 

 8642 (Gr, NY, R, UC); Colorado: New Windsor, Weldon County, Osterhout 2336 (NY, 

 UC, US) ; west of Trinidad, Hall 10777 (UC) ; Canon City, September 7, 1896, Greene 

 (Herb. Greene, type of C. virens Greene, minor variation 79) ; Grand Junction, August 27, 

 1896, Greene (Herb. Greene, type of C. laetevirens Greene, minor variation 42); Grand 



