456 COMPOSITAE 
2. Petasites sagittatus (Banks) A. Gray. Arrowhead Coltsfoot. Fig. 5794. 
Tussilago sagittata Banks ex Pursh, Fl. Amer. Sept. 531. 1814. 
Nardosmia sagittata Hook. Fl. Bor. Amer. 1: 307. 1833. 
Petasites sagittatus A. Gray, Bot. Calif. . 407. 1876. 
Similar ar to ug Ue ds but the basal leaves merely dentate, with 20-45 wae on Nai side or 
even, especially i mall ce chet te: pinnipalmately veined, cordate or more commonly sagit- 
tate, sometimes re he 30 cm. long and 25 cm. wide; bracts of on as areal tie aan and 
narrower, more often with abortive blades 
Wet places, Boreal Zone; Alaska to Pabvatoe south to northeastern eqninate: in Okanogan County, north- 
ern Idaho, Montana, and Colorado. Type locality: Hudson he April-June 
113. PSATHYROTES A. Gray, Smiths. Contr. 5°: 100. 1853. 
Heads discoid, the flowers all tubular and perfect, yellow, often turning purple in age. 
Involucral bracts ‘biseriate, the outer more he rbaceous and often a little shorter than the 
inn e€ c 
. Cc < 
tened, truncate or nearly so, minutely penicillate. Achenes hairy, mo ss turbinate, 
subterete or angled; pappus of relatively few and short, rather firm, capillary bristles. 
Strongly odorous annuals or ac cprrp ae with alternate (or all basal), petiolate, small but 
relatively broad leaves. [Nan poe transliteration of the Greek word for brittleness, 
reteerene to the pe stems oer bra 
A ge 4s native to the deserts is drier mountains of southwestern United States and adjacent 
es lig =— spe 2 ig Balbostsiis annua Nu 
Psathyrotes, Peucephyllum and so AG small southwestern genera have customarily been excluded from 
the Heliantheae (Helenieae) because of “th eir capillary pappus, and referred to the Senecioneae instead, Their 
relationship to the main bulk of the Senecioneae is doubtful, however, and further investigation of the affinities 
oO ese genera is well warranted. 
Outer sayernerss bracts relatively broad, more = ee oblong-obovate, the expanded green tip commonly 1.5-3 
mm. wide; plants shortly = as well as 1. P. ramosissima. 
Outer pivblaeeat bracts relatively narrow, n elady ae commonly a little constricted at ~ Kit the — 
the slightly expanded green tip cpeneally 0.4-1.3 mm. wide; plants scurfy-pubescent, vidently woolly. 
2 nnua, 
1. Psathyrotes ramosissima (Torr.) A. Gray. Velvet Rosettes. Fig. 5795. 
etradymia ramosissima Torr. in Emory, —_ re wie 145. 1848. 
Psathyrotes ramosissima A, Gray, Proc. Am cad. 7: 363. 1868. 
Winter annual, or in any case te ah er and subdichotomously much branched, 
the stems up to about 15(20) cm. long; herbage scurfy-pubescent and eviden tly short- woolly as 
: es b 
uc hi 
aling or a little shite thas the i inner, relatively broad, more or less oblong-obovate, the ex- 
peuded green tip oe only 1.5-3 mm. wide and often turned back; corollas long- hairy above, 
yellow Ww, piten turning since A in age; achenes dehenny long-hairy ; pappus ulvous 
Dry, open, often sandy places in the deserts and desert mountains, Sonoran Zone es; Colorado and Mojave 
Viasiete of souther n California south to Lower California, east to southwestern Utah, western Arizona, and northern 
Sonora; rarely ex sterie as far north as Reno, Nevada. Type locality: “Hills bordering the Gila” [River, Ari- 
zona]. March— May, and sometimes annie in the fall or winter. Turtleback. 
2. Psathyrotes annua (Nutt.) A. Gray. Mealy Rosettes. Fig. 5796. 
Bulbostylis annua Nutt. Journ. Acad. Phila. II. s 179. 1848. 
Psathyrotes annua A. Guay. Smiths. Contr. 5°: 100. 1853. 
Annual or winter annual, resembling : ramosissima, differing chiefly in the characters given 
in the key 
Dry n, often sandy or alkaline places, Upper Sonoran Zone; typically at somewhat higher elevations 0 
farther jie than P. ramosissima, apparently rare in bir saadenrt southwestern Idaho to southern Utah, a oh 
Nevada, northwestern Arizona, and the Mojave "Sond n California, and reputedly to Sonora and Low i 
fornia. Type locality: ‘Rocky Mountains, near a Fe” but pease oe 9 actually taken farther west. May 
114. LUINA Benth. in Hook. Ic. Pl. III. 2: 35. 1876. 
Heads discoid, the Pion all perfect and fertile, yellow or yellowish. Involucre a 
single series of rather firm, equal, sca arcely herbaceous to subherbaceous bracts. Receptacle 
nak thers Gorin to an entire or minutely sagittate base. Style-branches flattened, 
externally merely papillate or papillate-puberulent, with broad, introrsely marginal, stig- 
matic lines and a thickened, very short and blunt, papillate appendage. Achenes promi- 
nently several-nerved; pappus of numerous capillary bristles. Perennials with simple, 
entire to deeply cleft, ahetars leaves. [Name an anagram of /nula. 
The genus consists of the following 4 habitally very different but thel llied , all natives of the 
Pacific States and British Columbia. T Type species, a fae eyneleace Benth rece 
