SUNFLOWER FAMILY. 



511 



at base. Style glabrous, its flattened branches papillose on the back. 

 Pappus soft and white. (Anagram of Inula.) 



I. L. hypoleuca Benth. Stems nearly 1 ft. high from a woody 

 rootstock, white-tomentose; leaves ovate-oblong to elliptic, 1 in. long, 

 white with wool beneath, becoming glabrous and green on the veiny 

 upper surface; heads 5 or 6 lines high, several in an open cluster. 



Plant of the coast region: Chimney llock, Mendocino Co.; Santa 

 Cruz Mountains, Kellogg, July 2, 1868, seen by the author in the 

 Gray Herbarium, Harvard University. 



26. ARNICA L. 



Perennial montane herbs, somewhat glandular or aromatic. Leaves 

 all opposite or the upper alternate. Heads single or several, large, at 

 the summit of the single stem. Involucre broadly campanulate, not 

 calyculate at base; bracts lanceolate, equal, somewhat in 2 ranks. 

 Receptacle flat, naked. Disk-flowers many, yellow; ray-flowers pistil- 

 late when present, yellow. Achenes slender and somewhat spindle- 

 shaped, with a callous knob at base. Pappu3 a single row of rather 

 rigid and strongly roughened denticulate white bristles. (Origin of 

 name obscure.) 



Rays none; leaves more or less coarsely dentate 1. A. discoidea. 



Rays present; leaves more or less serrate 2. A. latifolia. 



1. A. discoidea Benth. Coast Arnica. One and one-half 

 to 2} ft. high, glandular- or viscid-pubescent especially above; leaves 

 ovate or oblong, irregularly and often coarsely dentate, rounded or 

 truncate or cordate at base, 4 in. long or less, on petioles nearly their 

 own length; cauline sessile, reduced, often with salient teeih, the 

 upper sometimes alternate: heads § in. high or nearly so; rays none; 

 involucre villous-glandular; achenes sparsely hispidulous, 2 to 3 lines 

 long. 



Dry open woods: frequent in the Coast Range Mountains from San 

 Luis Obispo to Monterey, Mt. Tamalpais, Mt. Diablo and northward 

 beyond our limits. May-Sept. 



2. A. latifolia Bong. Ten to 18 in. high, more or less glandular 

 but seemingly glabrous; leaves opposite, with 3 or 4 cauline pairs, the 

 lower ovate or roundish and petioled, the upper narrower and sessile, 

 sharply serrate (especially the middle ones) or some entire; heads 7 to 

 9 lines high; rays 7 lines long. 



Mt. Hamilton, W. W. Price, acc. to Zoe; Sierra Nevada. 



27. SENECIO L. Groundsel. 

 Herbs with alternate leaves and heads in terminal corymbs, rarely 

 solitary. Heads many-flowered. Flowers yellow in both disk and 

 ray, the latter pisti late or none. Involucre cylindrical to campanu- 

 late, with 1 or 2 rows of bracts of equal length, naked or with a few 

 small short bracts at base; bracts erect or connivent. Receptacle flat, 

 naked. Achenes terete. Pappus of abundant white and soft hairs. 

 Style branches truncate. (From the Latin senex, an old man, on 

 account of the white hair-like pappus.) 



