486 MINNESOTA BOTANICAL STUDIES. 



51. 1809. R. corthusaefolius WILLD. Enum. Hort. Berol. 

 588. 



Root of thick, fleshy, fasciculated fibers : plant velvety hairy, 

 i to 3 feet high : lower leaves long-petioled, roundish to reni- 

 form, incised, and with cut and toothed lobes ; stem leaves 

 divided into 3 to 5 narrow lobes ; upper ones sessile : flowers 

 several or many, terminal and axillary, rather paniculate ; sepals 

 5, ovate to lanceolate, green with pale margins ; petals 5, large, 

 broadly obovate, glossy yellow : akenes compressed, hairy on 

 sides, tapering into recurved styles nearly their own length : 

 head of fruit short oval. May, Island of Teneriffe, Canary 

 group. Garden, 45 : 944. Bot. Mag. 4625. Not very hardy, 

 and needs protection in winter and early spring. It is well 

 suited for pot culture. It is increased by division of the roots in 

 autumn. 



52. R. longipedunculatus SCHEIDW. in Hortic. Beige. 5: 

 163. t. 9 . 1838. 



Roots fibrous : stem slender, weak, scapose, often once 

 branched near the base : plant pilose with yellowish hairs : rad- 

 ical leaves 3-lobed, middle lobe trifid, otherwise mostly entire ; 

 true stem leaves wanting or very low ; petioles i to i ^ inches 

 long : peduncles 4 to 5 inches long, slender, erect or ascending, 

 bibracteate : flowers i or 2, terminal; petals 12 to 15, oblong- 

 lanceolate, acutish, yellow ; sepals reflexed. Wet places, Real 

 del Monte, north of Mexico City. 



53. R. Donianus PRITZ. ex Walp. Rep. 2: 740. 1843. 



R. humilis D. DON, ex G. Don, Gen. Syst. i : 34. 1831. 

 Not Pers. 1807. 



Short, i to 3 inches high, pilose : radical leaves stalked, cor- 

 date, obtuse, slightly 3-lobed and crenate : peduncles long, rad- 

 ical, axillary and terminal : flowers small, yellow : carpels 

 rather inflated, beaked. Mexico. 



54. R. multicaulis D. DON, ex G. Don, Gen. Syst. i : 34. 

 1831. 



Plant about 3 to 4 inches high, pilose : stems numerous, pros- 

 trate or ascending : radical leaves p'etioled, cordate-roundish, 3- 

 lobed ; lobes crenate : stem leaves sessile, entire, opposite or 

 apparently so : flowers yellow, medium size ; petals emarginate, 

 much longer than the sepals which are reflexed : carpels rather 

 inflated, pointed : head of fruit ovate. Mexico. 



