SUNFLOWBE FAMILY. 539 



lower leaves oblanceolate or linear-lanceolate, often narrowed at base 

 to a slender petiole, 1 to 2J in. long, often becoming concave or 

 involute when dry; heads almost sessile, crowded on the leafy branch- 

 lets; rays barely exserted, . pale yellow; fertile achenes carinatelv 

 1-nerved down the inner face. 



Common on dry hills and plains in the Coast Ranges (Solano Co , 

 Napa Valley, Healdsburg, Alameda Co.), and Sierra Foothills. 



Var congesta (L. congesta Greene). Eobust, nearly simple, 

 with short branches, 1 toljft. high or much branched and nearly 

 3 ft. high; heads larger, in thick glomerules.— North Coast Eanges: 

 Mt. Tamalpais, collected "by that most diligent gatherer of rare 

 Cahfornian plants, Mrs. Kate Curran," Greene; Pleasant Vallev 

 Solano Co.; Lake Co. ' 



54. HOLOZONIA H. & A. 



Perennial by creeping rootstocks. Stems slender and branches 

 almost filiform. Leaves opposite or the upper alternate. Heads soli- 

 tary, on slender or filiform peduncles, without leafy bracts. Flowers 

 white or rose-tinged; rays 5. Bracts of the involucre 5, completely 

 enclosing and deciduous with the obcompressed ray-achenes. Bracts 

 of the receptacle 9 to 12, connate into a cup surrounding the few disk- 

 flowers. Eay-achenes crowned with a small saucer-shaped pappus; 

 disk-achenes with a pappus of 2 slender deciduous paleaa. (Greek 

 holos, whole, -and zonia, zone, the bracts completely enclosing the 

 ray-achenes. ) 



1. H. fillpes (H. & A.) Greene. Stems often paniculately branch- 

 i'lgi 14 to 2j ft. high; leaves linear, canescent or villous, those of the 

 filiform branohlets oblong with marginal short-stipitate glands; invo- 

 lucre loosely villous; bracts of receptacle chaffy. — (Lagophylla fllipes 

 Gray.) 



North Coast Eanges: Mt. Tamalpais; Sonoma Co.; Napa Soda 

 Springs; Howell Mt. Sierra Nevada: Mariposa Co.; Calaveras Co.; 

 El Dorado Co. July-Aug. Lowest leaves linear or somewhat lan- 

 ceolate, commonly with 1 to 3 small teeth on each side, 1 to 4 in. 

 long; upper entire, glabrate in age. 



55. ACHYRACH/ENA Sohauer. 



Soft-pubescent annual with narrow leaves, the lower oppasite. 

 Involucre oblong-campanulate, its bracts lanceolate, herbaceous, each 

 enfolding a ray-achene. Bracts of the receptacle membranous , in a 

 single outer series. Eeeeptacle low-convex, naked. Flowers reddish 

 brown. Eay-flowers 5 to 8, little exceeding the disk, their ligules 

 short and broad, palmately 3-cleft. Achenes linear-clavate, all the 

 ribs or the alternate scabrous. Disk-achenes with a pappus of 

 about 10 silvery scales, the outer as long as the achene, the inner 

 nearly twice as long. (Greek achuron, chaff, and Latin achaenium, 

 an achene, on account of the very chaffy pappus borne on the fruit.) 



1. A. mollis Schauer. Erect, simple or branching, 9 to 18 in. 



