FLOWERING PLANTS AND FERNS OF ARIZONA 1025 



1. Malacothrix coulteri A. Grav, Amer. Acad. Arts and Sci. Mem. 



ser. 2, 4: 113. 1849. 



Mohave, Maricopa, Pinal, and Pima Counties, 500 to 3,500 feet, 

 March and April. Southwestern Utah to southern Arizona and 

 southern California; Argentina. 



Sometimes called snakeshead. 



2. Malacothrix glabrata A. Gray, Syn. Fl. I 2 : 422. 1884. 



Malacothrix californica var. glabrata A. Grav ex D. C. Eaton in 

 King, Geol. Expl. 40th Par. 5: 201. 1871. 



Coconino, Mohave, Maricopa, Pinal, Pima, and Yuma Counties, 

 up to 7.000 feet, common and abundant on plains and mesas, March 

 to June. Idaho to Arizona and California. 



A conspicuous element in the spring flora of the deserts. 



3. Malacothrix clevelandi A. Gray, Bot. Calif. 1: 433. 1876. 

 Mazatzal Mountains (Gila-Maricopa Counties) to the mountains 



of Pima County, 2,500 to 4,300 feet, mostly along streams, March 

 to May. Southern Arizona and California. 



4. Malacothrix fendleri A. Gray, PL Wright. 2: 104. 1853. 



Navajo, Yavapai, Greenlee, Pinal, Cochise, Santa Cruz, and Pima 

 Counties, 2,000 to 5,000 feet, sandy plains, mesas, and rocky slopes, 

 March to June. Western Texas to Arizona. 



5. Malacothrix torreyi A. Gray, Amer. Acad. Arts and Sci. Proc. 9: 



213. 1874. 

 Both sides of the Grand Canyon (Coconino County), southwest of 

 Pipe Springs (Mohave County), 5,000 to 7,000 feet, May to July. 

 Utah to Oregon, northern Arizona, and California. 



6. Malacothrix sonchoides (Xutt.) Torr. and Gray, Fl. North Amer. 2: 



486. 1843. 



Leptoseris sonchoides Nutt., Amer. Phil. Soc. Trans, ser. 2, 7: 

 439. 1841. 



Navajo, Coconino, and Mohave Counties, especially along the Little 

 Colorado River, apparently also at Patagonia, Santa Cruz County, 

 1,500 to 6,000 feet, April to June. Nebraska to Idaho, Arizona, and 

 California. 



Malacothrix saxatilis var. tenuifolia (Xutt.) Torr. and Gray was reported by 

 Gray from Arizona 19 in 1884, but no material from that State has been seen by the 

 author, and it is apparently not recorded by later writers; the locality of Gray's 

 specimen was probably erroneous. 



135. CALYCOSERIS 



Low, branching, winter annuals, glabrous except for conspicuous 

 stipitate glands on the upper part of the stem and on the involucre; 

 leaves pinnatisect into narrowly linear or filiform divisions; 'heads 

 white, rosy, or yellow; involucre of equal phyllaries, caJyculafce; 

 achenes fusiform, 5- or 6-ribbed, tapering into a short beak, this ex- 

 panded at apex into a shallow denticulate cup; pappus of numerous 

 hispidulous white bristles, deciduous in a ring. 



J 9 Gray, Asa. synoptical flora of north America, l •: 1884. (See p. 423.) 



