Davis: RANUNCULI OF NORTH AMERICA. 499 



petals i to 3 or 5, pale yellow, about i line long ; stamens only 

 5 to 10 : akenes oblong, hardly compressed, slightly margined ; 

 beak very short : head of fruit oblong. Low, wet places, Dal- 

 las, Tex., south and southeast. 



93. R. pusillus POIR. in Lam. Encycl. 6: 99. 1804. 

 R. Flammula WALT. Car. 159. 1788. Not Linn. 

 R. Bonariensis POIR. in Lam. Encycl. 6: 102. 1804. 

 R. humilis PERS. Syn. 2: 102. 1807. 



Annual : plant. */ 2 to 2 feet high, slender, weak, branching, 

 glabrous : basal and lower stem-leaves mostly ovate, petiolate ; 

 others nearly sessile, linear or lanceolate ; all entire or minutely 

 toothed : petals yellow, few, barely exceeding the sepals ; sta- 

 mens i to 10 : akenes obovate, tipped with the base of the style : 

 head of fruit globose. Marshy ground, New York, New 

 Jersey, to Florida, through Gulf region to Texas and Missouri. 

 Var. Lindheimeri GRAY, Proc. Am. Acad. 21 : 367. 1886. 

 R. trachyspcrmus var. Lindheimeri ENGELM. ex Gray PI. 



Lindh. i : 3. 1850. 



R. Biolettii GREENE, Pitt. 2: 225. 1892. 

 Low, rarely a foot high : akenes more papillose-roughened 

 than in the type. Middle coast of California to Galveston, 

 Tex., and New Orleans. 



94. R. Anderson! GRAY, Proc. Am. Acad. 7: 327. 1868. 

 Oxygraphis Andersoni FREYN, Flora, 70: 140. 1887. 



About 6 to 8 inches high, stem one-leaved or a naked scape : 

 basal leaves rather thick, 2 to 3 times ternately or pedately di- 

 vided or parted, lobes linear to lanceolate : flowers i or 2 ; 

 sepals glabrous ; petals ^ inch long, pink or rose, orbicular, 

 obovate or flabellate, claws narrow : akenes compressed, but 

 wholly utricular with membranous walls, oblique obovate to or- 

 bicular, y^ inch long, a very narrow membranous margin ; apex 

 abruptly sharpened with a very short style. Boise City, Idaho, 

 Salt lake, Utah, to eastern Sierras of California and Nevada. 



95. R. juniperinus JONES, Proc. Cal. Acad. Sci., Ser. 2, 5: 



616. 1895. 

 R. Andersoni var. tenettusWATS. Bot. King Exp. 7. /. /, 



f. 8-10. 1871. 



Plant taller and more slender than R. Andersoni; usually 

 branched once, i-leaved and 2-flowered : radical leaves more 



