mz )5 
Jae COMPOSITAE 
4-10 dm. fall, Jasheiately few- to many-branched, thinly arachnoid and glabrescent below, gray- 
or white-tomentose above, the lower verte also sparsely villous- ~pubescent witil spreading, siuung, 
multicellular ‘hairs: ecakis leaves up to 4 dm. long and to 1.2 dm. wide, oblanceolate in general 
outline, Sy ly pa rted or divided, ee divisions deeply iabed. the lo bn and margins short-spiny, 
narrowe wines a spiny- agi petiole-like base, the upper surface greenish, thinly arachnoid 
the lower ntice gray-green, arachnoid a ody illous ; lower cauline eaves similar to the basal 
is a 
on t unc ead 
heads solitary at the ends of short or longer branches, ge —3.5 cm. ong, : ones to sub- 
: u nly floc a 
ed at bas 
ve, narrowly lanceolate, tipped by a short stout Bm anata nd aca the inner with a 
eneisgicdos elongate gland, the inner phyllaries narrowed above into an attenuate, chartaceous, 
spinescent, more or less twisted tip, margin of all ees ie ae te; flowers 
sordid-whitish, corolla-tube 7 mm. long, the throat 5-7 mm. long, the lobes 5-7 mm. lon —— 
plump, oblanceolate-oblong, 6 mm. long, about 2 mm. wide; pappus slightly sordid, 1. 53 m. long. 
pen dry slopes and flats in clayey or pueks soil, Upper Sanovais and Arid Transition Zones; 8 of the 
Ca eelile Pat i tage in central and ers Oregon east to Montana, Wyoming, and perhaps Utah. Type local- 
ity: “Jack Creek, Montana,” June— 
10. Cirsium cymodsum (Greene) J.T. Howell. Peregrine Thistle. Fig. 5911. 
Carduus cymosus Greene, Fl. Fran. 480. 1897. 
Cirsium triacanthum Petrak, Beih. Bot. Centralbl. 35: 481. 1917. 
Cirsium cymosum J. T. Howell, Amer. Midl. Nat. 30: 37. 1943. 
Perennial with widely spreading, horizontal roots from which ones with stout sos and 
erect stems may develop; stems solitary or sa gg several from a branching crown, slender 
or stout, 3-7.5 oo tall, simple and i lr cym eens branching ewe ve and many-headed, 
1 derived eo a igneous or Spe Banna ae on open, brushy, or wooded slopes, 
widespre cot cad prow but not very common, Upper Sonoran and Arid Transition Zones; mountains and sage- 
brush flats of south-central ei and northern California southward in California to the northern ayied bey se 
and, in the Inner Coast Ranges the Diablo Range. Type locality: “Dry hills of Alameda and C a Costa 
counties,’ California; “Walnut. Cheek ” Contra Costa County, on type in Greene Herbarium. April ay say 
11. Cirsium ic ghee A. Gray. Bigelow Thistle. Fig. 5912. 
auarmcangs californicum A. Gray, Pacif. R. Rep. 4: 112. 1856. 
Greene, Bull. Calif. Aste a 404. 1887. 
winter annual or penis sub a strong taproot; stem erect, rather few- branched, 
0. 52 m. a te thinly arachnoid and somewhat crisp-pubescent. Earliest leaves sinuately pi innately 
lobed, the lobes broadly deltoid wah: apex and lateral teeth bearing short, slender, yellow spines ; 
sa g an i p 
ly ish- 
the lower side, narrowed below into a short, more a dehnitely clock oeticle e-like base 
ios cauline leaves similar to the basal leaves, the tae not at all auriculate-expanded but Say 
nt asa li i 
lan ae ess 
at t the base, sp: g above, the outer er s preading-reflexed, the middle horizontally persons al 
the tip Bee ied or introrsely curved, the inner sinuate-ascending or substrictly erec 
the bases chartaceous, the tips carinate-thickened and pst Chooses, the outer and middle aitiaries 
