448 COMPOSITAE 
ens 
35. Senecio cymbalaridides Nutt. — Mountain Butterweed. Fig. 5776. 
Senecio cymbalarioides Nutt. Trans. Amer. Phil. Soc ~ es 412, 384k, 
ecio onreey var. es realis Torr. & Gray, Fl. N. pod es 442. 1843. 
Ss , Pittonia 3: 88. 1896. 
Kea acss adewist Howell, Fl. NW. Amer. 379. 1900. Not S. adamsii Cheesm. 1896. 
Sealed preteomes Piper, Contr. U.S. Nat. Herb. 11: 598. 1906. 
Greene, Leaflets Bot. Obs. 2 190) 
Senecio sabsdorfis G nm. Bot. Gaz. 53: 511. 1912 
Sen eS ymbelarioides var. borealis Greenm. Ann. NO Bot. Gard. 3: 177. 1916. 
brous-rooted perennial from a caudex or short rhizome, 1-5 dm. tall, glabrous or lightly 
floccose-tomentose when young. Leaves thickish, somewhat succulent in life, the basal ones long- 
petiolate, with mostly elliptic to subrotund tund-obo blade, wavy or coarsely Eendte to 
shallow ulate or entire; cauline leaves few and reduced, becomin acaaile Farms somewhat 
pinnatilobate, at least to es their bases; heads several or rather many, the 4 mm. wide; 
involucre 5-7 mm. high, the bracts about 13 or about 21, rarely only 8; brartéales inconspicuous ; 
rays Se mm. long; Siok glabrous. 
ands and fairly moist to moderately dry open places in the mountains, Arid Transition and Bor eal 
Zones; pire oes Yukor" British oes, and by eb =n to pe aha and New Mexico; common in “the 
paket mountains of Orego: n and Washington, less frequent in the Sierra Nevada. Type locality: ‘In Oregon.” 
A font characteristic of alkaline meadows in southeastern Oregon and northern California has been 
ria = 5. eer i Aivigg but appears to be morphologically indistinguishable from many of the eee 
36. Senecio clevelandii Greene. Serpentine Butterweed. Fig. 5777. 
Senecio clevelandti Greene, Bull. Torrey Club 10: 87. 1883. 
Perennial with 1 or several stems from a — cau ie ex, 3-7 dm. tall, glabrous and strongly 
glaucous 7 oe Leaves thick and firm cely veiny, all entire, ‘the lowermost 1-2 dm 
long and 5- wide, with finlpiociestite or “clinic "inde equaling or more often = than 
: s se 
about 13 or it 2b: oe hies small but evident ; rays small, about 5-7 mm. long; achenes 
Moist places, generally on serpentine, Upper Sonoran Zone; North Coast Ranges of California, especially in 
Lake C cunt Tp locality : Indian aint Lake County. June_J uly. 
Sen elandii var. heter6phyllus Hoover, Leaflets West. Bot. 2: 132. Be . Robust plants resembling 
ia s. “clevela ndtt but with some me the upper cauline leaves more or less pinnatilobate, especia ae toward - 
hase. serpentine in the — of the Sierra Nevada in Tuolumne County, California. Type locality: ne 
Chinese bye ly Tuolumne Cour 
37. Senecio layneae Greene. Layne’s Butterweed. Fig. 5778. 
Senecio layneae Greene, Bull. Torrey Club 10: 87. 1883. 
Senecio fastigiatus var. layneae A. Gray, Syn. Fl. N. Amer. 17: 390. 1884. 
Perennial with 1 or several stems from a well-developed caudex, 3-7 dm. tall, slightly tomentu- 
lose when young, soon essentially glabrous. Leaves rather thick and firm, scarcely veiny, dark 
green above, sometimes paler and glaucous oe at entire or with irregularly scattered, sharp 
teeth or some of the cauline ones with a Uae arrow lobes; lowermost aap well developed and 
more or less Sateen cm. ao wide, the oblanceolate or aehosha e elliptic 
blade tapering to a petiole often as lon segs alles | eae es progressively reduced and less petiolate 
upward, the u upper idten slightly ecpahded - the seperti or subsessile base; heads relatively large, 
5-19 in an open inflorescence, the central one commonly overtopped by the lateral ones; dis 
1-2 cm. wide; ifoluc re 9-12 m m. high, the bracts conse about 2 or sometimes only 13, 
relatively broad and a n some a them partly connate; pest few but well developed = 
often almost like the Pets or none; rays few, commonly 5 or 8, showy, nities mostly 1.5-2 cm.: 
longs achenes glabrous, 4-5 mm. long. 
y banks in the Bias O douglasii belt; foothills of the Sierra Nevada, Eldorado County, 
Cc aitettion May 
38. Senecio fléttii Wiegand. Flett’s Butterweed. Fig. 5779. 
Senecio flettti Wiegand, Bull. Torrey Club 26: 137. 1899. 
na ennial fro finde tee branching, rhizomatous caudex, 0. 5-2(4) dm. tall, glabrous 
ohoat: or with: a litt icuous, persistent, tawny, floccose tomentum at the base and 
in the: leaf-axils. Basal foes wel developed and ersistent, up t a ie ¢ m. long (including the 
well-developed petiole) and =7 hogou mostly pinnatifid or ivpate-qnnminid the broad segments 
again toothed or lobulate, vary casionally simple, cordate, and merely palmately lobulate 
as in S. bolndcH and S. harfordi; cau leaves few and much reduced, with mostly narrower 
segments than the basal leaves, tem erage ne: : ral in compact 
cymose cluster ; Eivcluces 5-9 mm - high, gla piace the bracts about 13 or sometimes only 8; 
bracteoles — ext well Sager or wa sapeorss rays lt mm. long; pa glabrous. 
