1026 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



Key to the species 



1. Flowers white or rose-colored; achenes tuberculate, not very deeply silicate 

 between the ribs, dark-colored 1. C. wrightii. 



1. Flowers bright yellow; achenes minutely rugulose, not tuberculate, very deeply 

 sulcate between the ribs, light gray 2. C. parryi. 



1. Calycoseris wrightii A. Gray, PI. Wright. 2: 104. 1853. 

 Mohave County to Graham, Pinal, Cochise, Pima, and Yuma Coun- 

 ties, 1,200 to 4,000 feet, common on plains, mesas, and rocky slopes, 

 March to May. Western Texas to Utah, Arizona, southern California, 

 and northern Mexico. 



One of the handsomest of Arizona spring flowers, and conspicuous 

 in the more desert areas. 



2. Calycoseris parryi A. Gray in Torr., U. S. and Mex. Bound. Bot. 



106. 1859. 

 Western Mohave County, about 3,000 feet (Eastwood 18174> 

 Kearney and Peebles 13125), "central Arizona" (Palmer 292, in 1876)? 

 March and April. Southern Utah, Arizona, and southern California. 



136. GLYPTOPLEURA 



Dwarf depressed winter annuals; leaves pinnatifid, with a toothed, 

 white, crustaceous margin; heads white or pale yellow, turning pink 

 in drying; involucre of about 7 to 12 equal, lanceolate, scarious- 

 margkied phyllaries, with a calyculus of several spatulate bractlets, 

 these crustaceous-margined above and lacerate- toothed or pinnatifid; 

 achenes oblong or columnar, 5-ribbed, cancellate-rugose, at apex pro- 

 duced into a thick 5-lobed cuplike border, from which is exserted an 

 abrupt short beak dilated at apex to bear the pappus; pappus copious, 

 soft, white, capillary, deciduous. 



1. Glyptopleura setulosa A. Gray, Amer. Acad. Arts and Sci. Proc. 9: 

 211. 1874. 

 Fredonia, Coconino County, about 4,800 feet (Peebles 13062), Fort 

 Mohave, Mohave County (Lemmon in 1884), without definite locality 

 (Palmer in 1869), April to June. Southern Utah and northwestern 

 Arizona to southern California. 



Glyptopleura margtnata D. C. Eaton has been reported from Arizona, but no 

 specimens have been seen by the writer. In G. margtnata the crustaceous margin 

 of the leaves is broad, with short teeth, the bracts of the calyculus are pinnatifid 

 above and lacerate-fringed most of the way to the base, and the ligules are short 

 and little exserted; in G. setulosa the crustaceous leaf -margin is produced into 

 slender teeth longer than the margin itself, the bracts of the calyculus are lacerate- 

 fringed at the conspicuously dilated apex and naked below it, and the ligules are 

 long-exserted. 



137. TARAXACUM.20 Dandelion 



Scapose perennial herbs ; leaves all basal, runcinate-pinnatifid or some- 

 times merely toothed or sinuate-lobed; heads solitary, large, yellow, 

 on hollow scapes; involucre double, the outer phyllaries much shorter 

 than the inner ones, often recurved, the inner phyllaries 1 -seriate, 

 erect; achenes more or less fusiform, 4- or 5-ribbed, muricate above, 

 prolonged into a slender beak, this bearing the simple capillary pappus. 



The common dandelion is often used for greens, as a substitute for 

 spinach, and large-leaved cultivated varieties have been developed in 



20 Reference: Sherff, E. E. north American species of taraxacum. Bot. Gaz. 70: 329-358. 1920. 



