36 University of California Publications in Botany. [VOL. 3 



Dry hills from Arizona and the Colorado Desert north to San 

 Francisco Bay, mostly in the Sonoran zones: Coyote Canon. 

 Riverside Co., Hall, no. 2871 ; Griffith Park, Los Angeles, Braun- 

 ton, no. 570; Bear Valley, San Bernardino Mts., Parish, no. 

 1455 ; etc. 



Var. bracteata (Abrams) Hall, comb. nov. G. bract eata 

 Abrams, Bull. Torr. Club xxxiv. 265 (1907). Branchlets strong- 

 ly divaricate or even geniculate, with numerous bract-like leaves, 

 or these deciduous : heads few and large, solitary. ' * Southwest- 

 ern part of the Colorado Desert, Nov. 1889" (between Banning 

 and Seven Palms, ace. to Abrams), Orcutt. 



5. AMPHIACHYRIS Nutt. 



Ours a low desert shrub with alternate entire leaves and 

 glabrous herbage. Heads heterogamous ; ray-flowers yellow, pis- 

 tillate, fertile ; disk-flowers yellow, hermaphrodite-sterile. Invo- 

 lucre imbricated ; bracts thin, only the medial portion herbaceous. 

 Style-appendages lanceolate. Fertile achenes pubescent. Pappus 

 of ray-flowers, in our species, of few and short squamellae coales- 

 cent at base ; of disk-flowers of 5 to 20 weak bristles, more or less 

 dilated and united at base, nearly equalling the corolla. 



1. A. Fremontii (T. & G.) Gray, Proc. Am. Acad. viii. 633 

 (1873). Amphipappus Fremontii T. & G., Jour. Bost. Soc. Nat. 

 Hist, v. 108 (1845) ; Gray, PL Fremont. 17, t. 9 (1853). 



Decidedly shrubby, 3 to 6 dm. high, with rigid divaricate 

 branches; bark white after the first season: leaves obovate or 

 elliptic, acute, narrowed to the sessile base or short petiole, 5 to 

 12 mm. long: heads glomerate, the glomerules terminating short 

 branches of a compound terminal leafy-bracted cyme: involucre 

 ovoid, 4 mm. high; outer bracts narrow; inner bracts broadly 

 oblong, very obtuse, thin, appressed and more or less cohering: 

 rays 1 or 2, about 2 mm. long : disk-flowers 3 to 6. 



Lower Sonoran Zone, from near our northern borders into 

 Inyo Co., east to Nevada and Utah: "on the Mohave River and 

 other tributaries of the Colorado, ' ' Fremont, ace. to Gray ; eastern 

 Inyo Co. and Nevada, ace. to Coville ; Slate Range and Panamint 

 Mts., Hall & Chandler, nos. 6908, 7046 ; Argus Mts., Purpus, no. 

 5326. 



