C. NAUSEOSUS. 217 



specimen in Herb. Jones); same locality, October 29, 1880, Greene (NY); Bright Angel 

 Trail, Grand Canon, Arizona, Eastwood 3703 (SF). 



I2q. Chrysothamnus nauseosus turbinatus (Jones). — Shrub 5 to 15 dm. high, 

 rounded, bushy, broader than high; twigs irregularly ascending, leafy, faintly striate, 

 yellowish-green with a close, smooth tomentum; herbage not strongly scented; leaves 

 linear, 1.5 to 2.5 cm. long, about 1 mm. wide, l-nerved, merely tomentulose to densely 

 white-tomentose; inflorescence a few-headed simple or compound cyme; involucre 9 to 

 11 mm. high, very narrow, cylindric; bracts obtuse, often shortly apiculate, not keeled, 

 4 or 5 in each vertical row, sparsely tomentulose or the inner ones only ciliate; corolla 

 10 to 11 mm. long; tube puberulent; lobes ovate, erect, scarcely over 0.5 mm. long, the 

 tips villous with long hairs; style-appendage longer than the stigmatic part; achenes 

 densely pubescent. (Bigelovia turbinala Jones, Proc. Calif. Acad. II, 5:691, 1895.) In 

 mounds of clay or sandy soil built up in alkaline flats, southern Utah. Type locality, 

 Canaan Ranch (near Kanab, Kane County), Utah, on clay soil on the borders of an old 

 sink, at 1,540 m. altitude. Collections: Type collection, September 24, 1894, Jones 

 (Herb. Jones); Champlain, August 14, 1911, Jones (DS, Herb. Jones); Lund, Iron County, 

 Hall 10786 (UC). 



12r. Chrysothamnus nauseosus glareosus (Jones). — Shrub said to be only about 

 3 dm. high, many-stemmed; twigs erect, sparsely leafy; leaves broadly to narrowly linear, 

 slightly widened above, plane; inflorescence cymose; involucre about 11 mm. high; 

 bracts obtuse, somewhat keeled, in obvious ranks, erose-ciliate, scurf y-tomentulose; 

 corolla 10 to 12 mm. long, glabrous; lobes linear-lanceolate; style-appendage longer than 

 the stigmatic part, 0.9 mm. long; achenes glabrous. {Bigelovia glareosa Jones, Zoe 2:247, 

 1891.) Gravelly mesas of central and southern Utah and northern Arizona. Type 

 locality, Marysvale, southern Utah. Collections: Little Colorado River, Arizona, Octo- 

 ber 8, 1851, Thurber (?) (Gr). 



12s. Chrysothamnus nauseosus bigelovi (Gray). — Shrub 3 to 10 dm. high, densely 

 branched; twigs short, erect, leafy or nearly leafless, striate, yellowish-green with a closely 

 packed smooth tomentum; herbage scarcely odorous; leaves linear-filiform, 1 to 2.5 cm. 

 long, 0.5 to 1 mm. wide, l-nerved, tomentulose when young; inflorescence a lax few- 

 headed cyme terminating each of the branches; involucre 10 to 11.5 mm. high; bracts 

 acute or subacuminate, spreading in age, 4 or 5 in each row, tomentulose and sometimes 

 ciliate; corolla 9 to 10 mm. long; tube glabrous or nearly so; lobes ovate, erect or spread- 

 ing, 0.8 to 1.5 mm. long ; style-appendage longer than the stigmatic part; achenes glabrous, 

 5-nerved. {Linosyris (Chrysothamnus) bigelovi Gray, Pacif. R. R. Rep. 4^:98, plate 12, 

 1857.) On very dry hills and plains, southern Colorado to Texas and Arizona. Type 

 locality, hills and arroyos, Cienegella, above Albuquerque, New Mexico. Collections: 

 Buena Vista, Colorado, Crandall 2735 (NY, US); Wet Mountain Valley, Colorado, Au- 

 gust 29, 1893, Brandegee (UC); Colfax, Colorado, October, 1877, Brandegee (UC); type 

 collection, 1853-54, Bigelow (Gr); south of Farmington, New Mexico, Hall III40 (UC, 

 form with villous corolla-lobes) ; badlands near Ojo Alamo, New Mexico, Hall 11137 

 (UC); Las Palomas, Sandia Mountains, New Mexico, Ellis 319 (NY, US); Painted Des- 

 ert, Arizona, October, 1919, Long (UC, intermediate to subspecies glareosus, the bracts 

 only acute); Navajo Indian Reservation, Arizona, Standley 7373 (Gr, NY, UC, US); 

 Moqui Indian Reservation, Arizona, August 22, 1897, Zuck (Herb. Greene, type of C. 

 moquianus Greene, minor variation 47). 



\2t. Chrysothamnus nauseosus leiospermus (Gray). — Shrub low (3 to 12 dm. high), 

 with elect branches; twigs very many, crowded, erect, either moderately leafy or almost 

 naked, scarcely at all striate, yellowish-green to white even on the same twigs (tj'pe) 



