222 GENUS CHRYSOTHAMNUS. 



65. C. PATENS Rydberg, Bull. Torr. Club 31 : 652, 1904. — C. nauseosus ■pinifolius, but a form with spreading 

 and more or less falcate leaves. Type locality, Colorado. 



66. C. PINIFOLIUS Greene, Pittonia 5:61), 1902. — C. nauseosus pinifolius. 



67. C. PLATTENsis Greene, 1. c, 4:42, 1899. — Ba.sod upon C. speciosus platiensis, which see in this list. 



68. C. PULCHERRiMUS Nelson, Bot. Gaz. 28:370, 1899.— A variation of C. nauseosus speciosus recognized in 

 the field by its usually more robu.st, tree-like habit, larger leaves, larger inflorescences, and more nearly glabrous 

 involucre. It seems that as speciostis moved eastward it developed this fine form in favorable situations, while 

 subspecies typicus came to occupy the less favorable ones. The connection between pulcherrimus and speciosus 

 is found at so many places, both in the field and in the laboratory, that the former is looked upon as the result 

 of ecologic conditions and not of taxonomic rank. Its characters are strongly suggested by No. 58 of this list, 

 which is also a robust form with even larger leaves, but with a slightly different involucre. The type of pvl- 

 cherrimus is a specimen from Woods Landing, Wyoming, Nelson 3477 (R). 



69. C. PULCHERRIMUS var. FAsricuLATUs A. Nelson, Bot. Gaz. 28:371, 1899. — The same as pulcherrimus (see 

 preceding note), but with nimierous short branchlets and crowded rigid leaves only 2 to 3 cm. long. The types 

 came from Boulder Creek and Creston, Wyoming. 



70. C. SALiciFOLius Rydberg, Bull. Torr. Club 37: 130, 1910. — C. nauseosus salicifolius. 



71. C. SPECIOSUS Nuttall, Trans. Am. Phil. Soc. II, 7:323, 1840. — C. nauseosus speciosus. 



72. C. SPECIOSUS /3. ALBicAULis Nuttall, 1. c, 324, 1840. — C. nauseosus albicaulis. 



73. C. SPECIOSUS var. (?) .\rizonicus Greene, Erythea 3: 110, 1895. — C. nauseosus lalisquameus. Although 

 described by Greene on the same page as lalisquameus, the only tangible differences there given are the longer 

 leaves and rather deeply cleft coroUa in arizonicus. The specimens at hand exhibit much too great a fluctuation 

 in the length of the leaves to permit the use of this as a character, and the corolla-lobes are always short, aa 

 is indicated by the measurements given in table 23. A search for the type at the Greene Herbarium was 

 unsuccessful, but a specimen at the University of California (Santa Rita Mountains, Arizona, November, 1891 , 

 Brandegee), doubtless of the type collection, has leaves 2 to 4 cm. long and corolla-lobes 0.8 to 1 mm. long. 

 The herbage of this, and in fact most specimens, is very white, whereas the type of lalisquameus is less notably 

 so. It is believed, however, that this difference is too slight to be compared with that between other pairs of 

 subspecies (see p. 170). 



74. C. speciosus var. gnaphalodes Greene, 1. c. — C. naw^eosus gnaphalodes. 



75. C. speciosus var. (?) latisquameus Greene, 1. c. — C. nauseosus lalisquameus. 



76. C. speciosus var. (?) plattensis Greene, 1. c. 111, 1895. — A form of C. nauseosus lypicus discussed under 

 C. frigidus, No. 35 of this list. No type was indicated, but the distribution was stated as alkaline plains of the 

 Platte and elsewhere along the eastern base of the Rocky Mountains. No specimens collected by Greene 

 prior to 1895 have been found in herbaria. 



77. C. TORTUosus Greene, Pittonia 5:63, 1902. — Described from very immature specimens from Plumas 

 County and Mount Shasta, California. Probably referable to C. nauseosus consimilis, because of the green and 

 glabrous involucre of the only head on the type specimens (in Herb. Greene). The corolla-lobes in this young 

 condition are about 2 mm. long, the bracts rather pungently acute (suggesting subspecies occidenlalis) , the 

 leaves nearly filiform and more or less spreading, and the twigs tortuous. 



78. C. TURBiNATUS Rydberg, Fl. Rocky Mts. 859, 1917. — C. nauseosus turbinatus. 



79. C. virens Greene, Pittonia 5:61, 1902. — C. nauseosus graveolens. The type specimens (in Herb. 

 Greene) are perhaps a little greener than in the usual form, but although a search was made at the type locality 

 (Canon City, Colorado) and in surrounding districts, no specimens were found that could be satisfactorily 

 separated, either on color or on other features. The involucre Ls 7 to 8 mm. high in the type and the whole 

 head, to the tips of the styles, 12 to 15 mm. The flowers thus protrude farther than usual, but this is an exceed- 

 ingly variable character. The bracts, described as of more or less triangular outline and scarcely acute, are as 

 in typical graveolens. 



80. LiNOSYRis ALBICAULIS Torrey and Gray, Fl. N. Am. 2 : 234, 1842. — C. nauseosus albicaulis. 



81. L. BiGELOvi Gray, Pacif. R. R. Rep. 4«:98, 1857.— C. nauseosus bigelovi. 



82. L. CERUMINOSA Durand and HUgard, Jour. Acad. Nat. Sci. Phila. II, 3 : 40, 1855.— C nauseosus ceru- 

 minosus. 



83. L. GRAVEOLENS GLABRATA Engelmann, in Gray, Proc. Am. Acad. 8 : 645, 1873. — A form of C. nauseosiis 

 graveolens, judging from the description. Dr. B. L. Robinson writes that there is a specimen in the Gray 

 Herbarium collected in Nebraska by Henry Engelmann in 1856 and labeled " L. graveolens, glabrata, H. Engel- 

 mann, 1860 (G. Engelm. in litt.) " but that no reference to the name can be found in any of Engelmann's papers. 

 It seems, therefore, that the combination was published only in Gray's paper as cited. 



