330 MISC. PUBLICATION 42 3, IT. S. DEPT. OF AGRICULTURE 



10. Ranunculus glaberrimus Hook., EL Bor. Amer. 1: 12. 1829. 

 North rim of the Grand Canyon (McHenry 2076), 8,000 feet, dry 



ground, April to June. Western South Dakota to British Columbia, 

 south to New Mexico, northern Arizona, and northeastern California. 

 An absolutely glabrous perennial with a remarkable fascicle of large 

 roots. The first flower of spring in most of its range. The species is 

 represented in Arizona by var. ellipticus Greene (R. ellipticus Greene) . 



11. Ranunculus inamoenus Greene, Pittonia 3: 91. 1896. 



Ranunculus qffinis R. Br. var. micropetalus Greene, Pittonia 

 2: 110. 1890. 



San Francisco Peaks and vicinity (Coconino County), 8,000 to 

 9,000 feet, coniferous forests, flowering mostly in June and July. 

 Rocky Mountains from Alberta to New Mexico and northern Arizona. 



The type of var. micropetalus, a form with small flowers and fruits, 

 was collected on the San Francisco Peaks (Greene, in 1889). There 

 occurs also on the San Francisco Peaks, near timber line at about 

 12,000 feet, var. subaffinis (Gray) L. Benson (R. arizonicus var. 

 subaffinis Gray, R. subaffinis Rydb.) , the type of which was collected on 

 Mount Agassiz (Lemmon 4152). This variety is characterized by hav- 

 ing achenes about 2 mm. long and 1.5 to 1.7 mm. thick dorsoventrally, 

 the beak not curved, hooked at tip, usually 1.5 to 2 mm. long, the 

 petals 6 to 9 mm. long and 2.5 to 7 mm. wide, and the stipular leaf 

 bases 2.5 to 3 cm. long; whereas, in typical R. inamoenus the achenes 

 are about 1.5 mm. long and 1.3 mm. thick dorsoventrally, the beak 

 0.8 to 0.9 mm. long, recurved, the petals 2.5 to 5 (sometimes 8) mm. 

 long and 2 to 4 mm. wide, and the stipular leaf bases 1.5 to 2.5 cm. long. 



12. Ranunculus eschscholtzii Schlecht., Animad. Ranunc. 2:16. 1820. 

 San Francisco Peaks near timber line, 11,000 feet (Kearney and 



Peebles 12155), July and August. Alaska to Colorado, northern 

 Arizona, and southern Oregon. 



A variety of R. eschscholtzii, not yet recombined as such (R. eximius 

 Greene), has been collected on the San Francisco Peaks (Whiting and 

 Saunders). It is distinguished by clelt, rather than parted, basal 

 leaves, with the lobes sharply acute. 



13. Ranunculus cardiophyllus Hook., Fl. Bor. Amer. 1: 14. 1829. 

 Coconino County, on the Kaibab Plateau and the San Fran- 

 cisco Peaks, 7,000 to 9,500 feet, yellow pine forests, flowering mostly 

 in July. Rocky Mountains from Alberta to northern New Mexico 

 and Arizona. 



In addition to typical R. cardiophyllus, the var. subsagittatus (Gray) 

 L. Benson (R. arizonicus var. subsagittatus Gray, R. subsagittatus 

 Greene) is common in northern Arizona, ranging from the north rim 

 of the Grand Canyon and the San Francisco Peaks to the White 

 Mountains (Apache and Greenlee Counties), type collected by Lemmon 

 in De La Vergne Park (now Fort Valley) , near Flagstaff. The variety 

 is less hairy than the typical form and is otherwise distinguished by the 

 characters given in the key. Forms intermediate between this variety 

 and typical R. cardiophyllus are as numerous as the extreme forms in 

 Arizona. 







