FLOWERING PLANTS AND FERNS OF ARIZONA 951 



(Pearson in 1909). Maine to Saskatchewan and Idaho, south to 

 Florida, Colorado, and southern Arizona. 



Cutleaf coneflower. A showy but rather coarse plant, of which a 

 double form known as goldenglow is often cultivated. The plants are 

 reported to be poisonous to cattle, sheep, and swine. 



57. RATIBIDA. 74 Coneflower 



Perennial herbs; leaves alternate, pinnately parted; heads terminal, 

 long-peduncled, showy, the rays yellow or partly brown -p urple ; disk 

 globose to cylindric; achenes short and broad, compressed, with 1- 

 angled sides; pappus of 1 or 2 teeth, sometimes of squamellae. 



Key to the species 



1. Disk soon cylindric, 10 to 40 mm. long, 6 to 10 mm; thick; rays usually 8 to 30 

 mm. long; peduncles 6 to 25 cm. long 1. R. columnaris. 



1. Disk subglobose, becoming oblong-ellipsoid, 6 to 13 mm. long, 6 to 9 mm. 

 thick; rays 3 to 8 mm. long; peduncles 1 to 5 cm. long 2. R. tagetes. 



1. Ratibida columnaris (Sims) D. Don in Sweet, Brit. Fl. Gard. ed. 2, 



4: pi. 361. 1838. 



Rudbeckia columnaris Sims, Curtis's Bot. Mag. 39: pi. 1601. 



1813. 

 Lepachys columnaris Torr. and Gray, Fl. North Amer. 2: 315. 



1842. 

 Ratibida columnijera Woot. and Standi., Contrib. U. S. Natl. 



Herbarium 19: 706. 1915. 



Apache, Navajo, Coconino, Greenlee, and Santa Cruz Counties, 

 5,000 to 7,000 feet, plains and openings in pine woods, June to Novem- 

 ber. Minnesota to British Columbia, south to Tennessee, Colorado, 

 and Arizona. 



The var. pulcherrima (DC.) D. Don is an unimportant form with the 

 rays partly or wholly brownish purple (yellow throughout in the 

 typical form). R. columnaris is suspected of being poisonous to cattle, 

 but the plant is rarely eaten. 



2. Ratibida tagetes (James) Barnhart, Torrey Bot. Club Bui. 24: 



410. 1897. 



Rudbeckia tagetes James in Long, Exped. 2: 68. 1823. 

 Lepachys tagetes A. Gray, U. S. Rpt. Expl. Miss. Pacif. 4: 103. 



1857. 



Adamana, Apache County, 5,200 feet (Griffiths 5092), plains, June 

 to September. Kansas and Colorado to Texas, New Mexico, and 

 eastern Arizona. 



58. ZALUZANIA 75 



Plant sufTrutescent, branched, slightly pubescent; leaves alternate, 

 ovate, 3-lobed; heads radiate, yellow, loosely clustered; receptacle 

 conic; rays pistillate; achenes of the disk short, quadrangular, epap- 

 pose, those of the ray with a few short setae. 



74 Reference: Sharp, W. M. a critical study of certain epappose genera of the helianthk \k- 



VERBESININAE OF THE NATURAL FAMILY COMPOSITAE. Mo. Bot. Gard. Anil. 22: 66-77. 1935. 



75 Reference: Sharp, W. M. a critical study of certain epappose genera of the helianthk vk- 



VERBESININAE OF THE NATURAL FAMILY COMPOSITAE, Mo. Bot. Gard. Ann. 22: 110-114. 

 1935. 



