218 GENUS CHRYSOTHAMNUS. 



with a very close tomentum; herbage not noticeably odorous; leaves filiform or nearly so, 

 acute, mostly 0.5 to 2 or 3 cm. long, under 0.5 mm. wide, often reduced and scale-like, to- 

 mentose or green and essentially glabrous; inflorescence a close terminal cyme of 2 or 3 

 cm. diameter; involucre 6 to 8 mm. high; bracts obtuse, not keeled, in vague ranks, gla- 

 brous; corolla 5 to 8 mm. long; tube very obscurely pubescent (or glabrous?) ; lobes ovate, 

 erect, 0.5 mm. or less long; style-appendage longer than the stigmatic part; achenes com- 

 pletely glabrous in the typical form but often sparsely pubescent, especially along the 

 prominent nerves. {Bigelovia leiosperma Gray, Syn. Fl. P, 139, 1884.) On exceedingly 

 arid slopes, southern Utah, southern Nevada, and the borders of California. Type 

 locality, Saint George, southwestern Utah. Collections: Type collection, 1875, Palmer 

 (Gr); southeastern Utah, Rydberg and Garrett 9435, 9940, both with bracts nearly as 

 acute as in subspecies bigelovi but not pubescent (UC, US) ; Clear Creek Canon, Utah, 

 Jones 6105 (Herb. Jones, NY, UC, type collection of Bigelovia leiosperma abbreviata Jones, 

 minor variation 14); 3 miles north of Salina, Utah, Jones 529 (UC, same variation); 

 Panaca, Nevada, September 5, 1912, Jones (UC); Caliente, Nevada, Hall 10791, 10795 

 (UC); Candelaria, Nevada, Shockley 311 (DS, Gr); Providence Mountains, California, 

 June 6, 1902, Brandegee. 



MINOR VARIATIONS AND SYNONYMS. 



The number of minor variations of Chrysothamnus nauseosus is exceptionally high. This list includes only 

 those which have already received names and a few others of exceptional interest. Still smaller variations, 

 many of which, however, are more significant than some of the named species of preceding taxonomists, have 

 been indicated by parenthetical remarks in the citation of specimens under the subspecies or are left without 

 mention. To list and describe all of these would occupy much space and would be of little value, unless 

 accompanied by a close ecologic and genetic analysis. 



AO of the known synonyms under Bigelovia, Chrysocoma, Chrysothamnus, and Linosyris are here listed. 

 The few that have been published under other genera are not of significance, since none of them take prece- 

 dence over the names here given. 



1. Bigelovia bigelovi Gray, Proc. Am. Acad. 8:642, 1873. — C. nauseosus bigelovi. 



2. B. CERUMINOS.A. Gray, 1. c. 643, 1873. — C. nauseosus ceruminosus. 



3. B. COLLINA Nelson, Wyo. Exp. Sta. Bull. 28:122, 1896. — Based upon C. collinus Greene, which see. 



4. B. DRACUNCULOiDEs DeCandolle, Prodr. 5:329, 1836. — C. nauseosus graveolens. DeCandoUe here makes 

 a transfer of the specific name from Chrysocoma dracunculoides Pursh (Fl. Am. Sept. 2:517, 1814). Pursh's 

 description was intended to include graveolens, although the reference to Chrysocoma dracunculoides Lamarck 

 is an error, Lamarck's plant being an Aster. 



5. B. GLAREOSA Jones, Zoe 2:247, 1891. — C. nauseosus glareosus. 



6. B. GRAVEOLENS Gray, Proc. Am. Acad. 8:644, 1873. — C. nauseosus graveolens, in part. Several of the 

 cited synon>Tns belong to other subspecies. 



7. B. GRAVEOLENS var. ALBiCAULis Gray, 1. c. 645, 1873. — C. nauseosus albicaulis. 



8. B. GRAVEOLENS var. APPENDicuLATA Eastwood, Proc. Calif. Acad. Ill, 1:74, plate 6, 1897. — An 

 abnormal form of C. nauseosus latisquameus, with 1 to 4 linear appendages on the corolla-tube. The tube is 

 arachnoid-pubescent and the lobes are very short, these characters suggesting a connection with subsp. holo- 

 leucus. Type locality, White Sands of New Mexiijo. 



9. B. GRAVEOLENS var. GLABRATA Gray, Proc. Am. Acad. 8:645, 1873. — C. nauseosus graveolens, from the 

 description, although this applies also to several other subspecies. The synonym cited has not been placed. 

 (See No. 83 of this list.) 



10. B. GRAVEOLENS var. HOLOLEUCA Gray, Proc. Am. Acad. 8:645, 1873. — C. nauseosus hololeucus. 



11. B. GRAVEOLENS var. LATisQUAMEA Gray, Proc. Am. Acad. 8:645, 1873. — C. nauseostis latisquameus. 



12. B. JUNCEA Greene, Bot. Gaz. 6:184, 1881. — C. nauseosus junceus. 



13. B. LEIOSPERMA Gray, Syn. Fl. P:139, 1884.— C. nauseosus leiospermus. 



14. B. LEIOSPERMA var. ABBREVIATA Jones, Proc. Calif. Acad. II, 5:693, 1895. — C. nauseosus leiospermus, 

 but with scant tomentum and with leaves 1 cm. or less long. The type is from Clear Creek, Utah. 



15. B. MissouEiENSis DeCandolle, Prodr. 5:329, 1836. — Based upon Chrysocoma nauseosa Pallas; there- 

 fore the same as Chrysothamnus nauseosus typicus. 



16. B. MOHAVE.NSis Greene in Gray, Syn. Fl. l':138, 1884. — C. nauseosus mohavensis. 



17. B. TURBiNATA Jones, Proc. Calif. Acad. II, 5:691, 1895. — C. nauseosus lurbinatus. 



