g itANrxrri.Acio.i';. • i;a„inaniM,. 



ovate or globuhir. — PI. Ilavtw. 295. U. </i.s.sectus, IIoi)k. & Ain., 15ot. Beech. 

 316. ;.'. acjis, var., 'loir. .V Cray, Fl. i. 21. J!. dc/jAu,>/uliiis ? il.. Go'J (nut 

 liliK.). 



\'ar. canus. Softly caiiest-eiit througlioiit. — A*, caaiis, I5eiith. I'l. Uailw. 21)4. 

 'I'liib is l.y liii till! most odimuoii iiml uliuinlaiit sp.M'ios in llio State, iiiiil is imrticiiliiily al)iiii- 

 iliiiit ill 111.; I'Diisl niugL's, wlieio low •;mssy hills aro ol'lou yellow with Ihii shining iKnvurs in early 

 spring. This spcc-ics is vuiy variahlo in most oi' its parts. The pubescence varies with the local- 

 ity, and also with the year ; the plant being more hairy in dry years. The leaves vary greatly in 

 the degree of their division ; they are sometimes simply 3-lobed, sometimes dissected into nu- 

 merous linear divisions, and are found in every inteniiediate gradation. The flowers are usually 

 bright sulphur-yellow, but are sometimes found quite pale. 11. canas, Benth., is thought i;y 

 I'rofessor Gray to be probably A', uccidcntalis, Nutt. ; but the fruit is unknown. 



13. R. repens, Liim. iMmc or less hairy : stems aseeiulinj,', usually not more 

 tluui lU to 10 inches lonj.;, ami in the tyjiical i'orm often forming long lunnoi-s : roots 

 a chister of somewhat tliickeneil iibres : radical leaves variously ternately divided; 

 the leaflets either sessile or stalked, and variously laciniately cut or divided : Howers 

 6 to 10 lines in diameter; petals usually f) to 7, obovato and longer than the spread- 

 ing sepals: akenes llattened, margined, \\ lines long, the stout beak nearly lialf 

 as long : heails compact and globular. 



This variable species stands between R. Caiifoniicus and E. maci-anthus, its varieties passing 

 into those species by a complete succession of forms. The connecting forms, however, aie not 

 Californian. The species is rare here, and it is questionable whether the typical form has yet 

 been found in the State. It really bidongs more eastward. The two others mentioned, while 

 more limited in lungi;, are vastly more abundant here. It extends across the continent and to 

 Europe. 



14. R. macranthus, Scheele. More or less hairy with spreading hairs : root 

 as in the la.st : stems stout, erect, 2 to 4 feet high : radical leaves 1 - 2-ternately di- 

 vided ; the leaflets laciniately toothed or lobed : llowers 14 to 18 lines in diameter : 

 l)etals commonly f) or (>, broadly obovate, deep shining yellow, twice as long as the 

 closely retlexed sejjals : akenes llattened, but hardly margined, U liners long; the 

 subulate beak nearly as long ; crowded into an ovate-globose head. — -^Vatson, Bot. 

 King. 9. 



Moist soils from Oregon to Nevada and Texas. In this State near the coast. This is the 

 largest and stoutest of all our species ; is sometimes over 5 feet high (Kellogc/), and also has the 

 largest flowers. As in the other species of this section, the leaves are very variable as to division 

 and pubescence. Specimens from Texas are more hairy, and the petals are more numerous and 

 narrower tlian in ours. 



15. R. Nelsonii, var. tenellus, Gray. S})aringly jjilose : stems erect, 1^ to 2 

 feet high, rather slender : radical leaves either trifoliohite, with the leallets cuneate 

 at the base and laciniately 3 to 5-cleft, or else simi)ly cleft and Avith the divisions 

 again cut into lobes : petals usually 5, 1 to 3 lines long, exceeding the hairy, strongly 

 retlexed sepals : akenes a full line long, llattened, with a short stout curved beak : 

 heads globular, 3 lines in diameter. — Pruc. Am. Acad. viii. 374. Ji. tentllus, 

 Nutt. ; Torr. & (J ray, Fl. i. 23. 



Sierra Nevada near Yosemite, Z>o/«H(/er. The typical form is a moie robust jilant, the simple 

 radical leaves often 3-4 inches in diameter. It mnges from Oregon to Alaska. Our variety has 

 a more slender habit, the ra<lical leaves two inches or so in diameter, the peduncles quite slender 

 and 1-4 inches long. The small llowers easily distinguish it frmn the othei- species of this group. 



§ 5. Alrticn /(is/>i(/-r('in//i('iinl : (inuiidl : ol/imvist as in § 4. — KdlliNKl.l-A, \)C 

 10. R. hebecarpus, Hook, i^ Am. Somewhat pilose, with sj)reading hairs: 

 stems ascending, slender, (i to 18 inches high: lower leaves ternate or 3-i)arted ; the 

 leallets cuneate at base, and 2 to 3-lobed ; upjier ones more divided : petals 5, u line 

 or less long : sepals hairy, about equalling the petals : akenes few in a head, a line 

 or less Itmg, rounded, Hat, the sides rotigh with short scattered hairs : heads globu- 

 lar, 2 lines in diameter. — Bot. Beech. 310. /i*. parvi/lurtin, var., Toir. I't (Jray, 

 in. i. 25. 



