ITl! (' tiir( rsil 1/ of Cnlifoniia I'uhlicdtioiis in Iloinini | \'<)i.. 7 



(Jt'o. H. Hall. iHi. l!4; Pine Mdiiiitaiii i\idfi:o, San Antonio MoiiiitMins, 

 I. M. .Joliiisloii. MO. K).")!*: rockv hillsides of Ixoinul \'allt'y. San 

 .lacinto Mountain al !»()()() lo D.IOO feet altitndc, II. M. Hall, no. ::;41. 

 In tliis last lui'nl ioMid collect ion tin' coni|)act cynus ai'c only .'^ to 4 cm. 

 aci-oss, the anther-tips are 1 nun. or iiioi'e lonji' and vei'y slendei", the 

 stylc-hi'anchcs are fully exserted and 4 to 6 nnn. lon<>-. A detailed 

 study of fresh material may dcMiionsti'ate that it is a variety di.stinet 

 from ht rnarcJiiius, bnt the s])eeimens at iiand are too nieaj^re to justify 

 this. 



The variet\' b( riuirdinus is somewhat like (jccl<l( ntdlis hut with a 

 larger and loo.ser intloreseenee, lonjjer involucres and flowers, and 

 thinner tegules which are gradually acuminate instead of abruptly 

 jiointed. In most of its characters, as well as in the appearance of 

 herbarium specimens it almost du])licates th(^ Rocky ^Mountain piil- 

 rh< rriiHiis, here referred to var. sp(ci()siis, but the involucre is longer 

 and the moi-e sli'ongly keeled bracts are acinninate instead of merely 

 acute. Moreover the geographic isolation of l)( r)i(ir<ll)iiis argues for 

 its recognition as a variety distinct from pulchcrriiiius. 



11. Chrysothamnus nauseosus var. Bigelovii (Gray) comb. nov. 



Linosyris {Chriisathdninus} Bi(f<iovii Gray, Pacif. E. E. Eopt.. vol. 4, no. 4. 

 p. 98, 18.j7. 



Shrub densely branched, 3 to 10 dm. liigh : twigs siiort, leafy, 

 yellowish green v.'ith a closely ])acked tomentiun : leaves linear-filiform, 

 1 to 3 cm. long, tomentulose when young: inflorescence a lax few- 

 headed cyme terminating each of the branches: involucre 10 to 12 

 mm. high ; bracts 4 or 5 in each row, tomentulose and sometimes 

 ciliate, attenuate, spi'cading in age: corolla 8 to 9 mm. long: lobes 

 ovate, erect, 0.5 to O.S mm. long: akenes glabrous. 



The variety HujiJovii is a form from the vei-y dry plains and hills 

 of the southern Rocky ^lountain region and southward to Texas. It 

 has been classified near to C. piilch<lhis but the brittle striate twigs 

 and divaricate branching of that sjiecies indicate for it an entii'cly 

 different origin. Moreover, the loose invohiei-es of Biyelovil, with 

 bracts in oidy obscurely vertical ranks, are very unlike those of the 

 Pulchdli. It is plaiidy a variant of nauseosus, and its nearest affinity 

 will probably be found in vai'. Jeiosperiiixs, from which it differs 

 chiefly in the very pubescent and acute bracts. Specimens gathered 

 in southea-stern Utah by Rydberg and Garrett (nos. 94.']5, 9940) are 

 intermediate, having the essentially glabrous involucres of l('iosp( rnms 

 but with bracts whicli are almost as sharp as in Iii(/eh>i'ii. 



