202 GENUS CHRYSOTHAMNUS. 



Arizona. Type locality, Mount Davidson, Nevada, above Virginia City. Collections: 

 Type collection, Bloomer (Or) ; northwestern Nevada, Watson 570 (Gr) ; Nevada : Comet 

 Peak, Pioche, August 30, 1912, Jones (UC); near Verdi, July, 1888, Sonne (UC); Frank- 

 town, Kennedy 1934 (DS, Gr, UC); Kings Canon, Ormsby County, Baker 1503 (Gr, 

 SF, NY, UC, US); Spanish Springs Valley, Washoe County, Kennedy 1950 (DS, Gr, 

 NY, UC, US, minor variation 19); Ebbett's Pass, California, Breiver 1985 (Gr, UC, 

 subalpine form) ; Keddie and Portola, Plumas County, California, September, 1919, Johns- 

 ton (UC, green and gray forms growing together, see minor variation 20); branch of 

 Coconino Wash, Arizona, Hall 11196 (UC); Grand Canon, Arizona, Eastwood 3636 (SF). 



MINOR VARIATIONS AND SYNONYMS. 



1. BiGELOviA BOLANDEiU Gray, Proc. Am. Acad. 8:641, 1873.— C. parryi bolanderi. 



2. B. HOWARDi Parry, in Gray, 1. c. — C. parryi howardi. 



3. B. HOWARDI var. attenuata Jones. Proc. Calif. Acad. II, 5:691, 1895. — C. parryi attenuatus. 



4. B. HOWARDI nevadensis Gray, 1. c. — C. parryi nevadensis. 



5. B. NEV.\.DENSis Gray, Syn. Fl. l':136, 1884. — C. parryi nevadensis. 



6. B. PARRYI Gray, Proc. Am. Acad. 8:642, 1873. — C. parryi typicus. 



7. Chrysothamnus affinis Nelson, Bot. Gaz. 28:374, 1899. — A variation close to C. parryi attenuatus, 

 which was made a variety of this by Nelson (see next entry). The attenuation of the bracts is intermediate 

 between this and subsp. howardi, while the low number of bracts (12 to 15) and the yellowish-green foliage sug- 

 gest subspecies typicus. The upper leaves are reduced as in attenuatus and the flowers are 5 to 6 in each head. 

 These figures are derived from the type specimen which is from Jefferson, South Park, Colorado (August 29, 

 1896, Cowen, Rocky Mt. Herb.). 



8. C. AFFINIS ATTENUATUS Nelson, 1. c. — C. parryi attenuatus. 



9. C. ASPER Greene, Leaflets 1:80, 1904. — C. parryi asper. 



10. C. ATTENUATUS Rydberg, Bull. Torr. Club 37 : 130, 1910.— C. parryi attenuatus. 



11. C. BOLANDERI Greene, Erythea 3:114, 1895. — C. parryi bolanderi. 



12. C. HOWARDI Greene, 1. c, 113, 1895. — C. parryi howardi. 



13. C. MONOCEPHALUs Nelson and Kennedy, Proc. Biol. Soc. Wash. 19:39, 1906. — C. parryi monocephalus. 



14. C. NEVADENSIS Greene, 1. c, 114, 1895. — C. parryi nevadensis. 



14a. C. NEVADENSIS forma monocephalus Smiley, Univ. Calif. Publ. Bot. 9:357, 1921. — C. parryi 



monocephalus. 

 146. C. nevadensis var. vulcanicus Smiley, 1. c. — C. parryi vulcanicus. 



15. C. newberryi Rydberg, Bull. Torr. Club 31:652, 1904. — A variation of C. parryi attenuatus in which 

 the tomentum of the twigs is white instead of yello%vish-green. When portions of the types of these two are 

 directly compared, no other difference is found. Similar color variations are known in subspecies howardi, 

 and in C. nauseosus two subspecies {gnaphalodes and hololeucus) are distinguished by this character, but here 

 the difference extends to the foliage also, other features furnish supporting characters, and the two commonly 

 grow side by side but with no evidence of intergradation. The type of newberryi is from Canon Largo, New 

 Mexico. An additional citation by Rydberg is Mesa Verde, southwestern Colorado, September, 1892, East- 

 wood. At the University of California this latter collection includes both the newberryi form and a twig, prob- 

 ably from another plant, of typical attenuatus with the usual greenish tomentum. 



16. C. PARRYI Greene, Erythea 3: 113, 1895. — C. parryi typicus. 



17. C. PAKRYI ASPER, but with shorter and wider leaves, the average about 2 cm. long by 2 mm. wide, and 

 the stipitate glands so prominent as to make the foliage harsh to the touch. Lee Canon, Charleston Mountains, 

 Nevada, at 8,000 feet elevation. Heller 11036 (UC). This specimen is only 1.5 dm. high, twice as broad, and 

 with inflorescences reduced to 1 to 4 heads each. Somewhat intermediate to true asper, especially in the longer 

 leaves, is a collection from Alamo Mountain, Ventura County, California, at 2,135 km. {Hall 6701 UC). 



18. C. PARRYI howardi, but much reduced in stature and inflorescence and the tomentum of the steins 

 white. This variation is confined to the northern part of the range of howardi and has the appearance of a 

 plant contending with a mora rigorous habitat and reduced water-content. It is represented by collections 

 from Carbon County, Wyoming (Goodding 537, 2016), and from Albany County, Wyoming {Goodding 2072, 

 Nelson 8824). 



19. C. parryi nevadensis, but with linear-spatulate, usually greenish leaves only 1.5 cm. long, the inflor- 

 escence reduced to 2- or 3-headed clusters at the end of each twig, and the corollas pink. The best example 

 is a plant from Spanish Springs Valley, 1,480 km. elevation, Washoe County, Nevada, Kennedy 1050 (UC). 

 The same form, but with the leaves gray tomentose as in the next, comes also from hills around Reno, Nevada, 

 September 20, 1910, Heller (DS, UC). These and otlier Nevadan collections suggest that it is a starved form, 

 perhaps of alkaline or otherwise unfavorable habitats. 



