SUNFLOWER FAMILY. 



539 



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

 to a slender petiole, 1 to 2£ 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 carinately 

 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). Robust, nearly simple, 

 with short branches, 1 to 1£ ft. high or much branched and nearly 

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

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

 Californian plants, Mrs. Kate Curran," Greene; Pleasant Valley. 

 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. Ray-achenes crowned with a small saucer-shaped pappus; 

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

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

 ray-achenes.) 



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

 ing, 1^ to 2f ft. high; leaves linear, canescent or villous, those of the 

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

 lucre loosely villous; bracts of receptacle chatty. — (Lagophylla filipes 

 Gray.) 



North Coast Ranges: 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 i to 3 small teeth on each side, 1 to 4 in. 

 long; upper entire, glabrate in age. 



55. ACHYRACH/ENA Schauer. 



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

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

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

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

 brown. Ray-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 achamium, 

 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. 



