1P07] Hall. Compositae of Southern California. 143 



seen the following: Dume Point, Los Angeles Co., Mar., 1898, 

 Barber, no. 372 ; 33 foothills east of Hueneme, Ventura Co., 1894, 

 Wright; Point Sal, Santa Barbara Co., 1892, Jared, and May, 

 1896, Miss Eastwood; Santa Cruz Island, 1886, Greene, and 1888, 

 Brandegee; Santa Catalina, Santa Barbara, and San Nicolas 

 islands, Mrs. Trask; Santa Rosa Island, Harford; San Miguel Isl- 

 and, 1903, Beck. Labels accompanying Mrs. Trask 's specimens 

 state that the heads are sometimes discoid and that the rays, when 

 present, are sometimes pale yellow at the tip. 



The longevity of plants grown in the Botanic Garden at 

 Berkeley is 4 to 6 years. When removed from the ground and 

 placed in a dry room, they continue to send forth leaves and 

 flowers for several weeks, this being possible because of the thick 

 stems which apparently act as storage reservoirs. 



51. BIDENS L. BEGGAR TICKS. 



Herbs with toothed, pinnatifid, or pinnately compound op- 

 posite leaves. Heads many-flowered, solitary racemose or pan- 

 icled. Ray-flowers mostly neutral or wanting. Involucre dou- 

 ble, the inner bracts membranous and more numerous than the 

 outer ones. Chaff of the receptacle flat or merely concave. 

 Disk-achenes obcompressed, or slender and 4-sided, crowned 

 with 2 to 4 rigid persistent retrorsely barbed awns. 



Leaves simple: rays showy, yellow 1. B. expansa. 



Leaves compound: rays none or inconspicuous 2. B. pilosa. 



1. B. expansa Greene, Pitt. iv. 266 (1901). B. sveciosa 

 Parish, Zoe v. 75 (1900) ; not B. speciosa Gardn., in Hook. Lond. 

 Journ. Bot. iv. 126 (1845). WATER DAISY. 



Perennial by stolons, the stems decumbent at base but soon 

 erect and 1 to 12 dm. long : herbage glabrous throughout : leaves 

 1 to 2 dm. long, lanceolate, acuminate, narrowed to the connate 

 base, evenly sub-serrate with short callous-tipped teeth : heads on 

 stout peduncles, erect in flower, nodding in fruit : outer involuc- 

 ral bracts 4 to 8, linear-oblong, from nearly equalling to much 

 exceeding the disk, serrate when foliaceous; inner bracts 8, 



33 First reported from Dume Point, or ' ' Point Dumas, ' ' by Dr. H. E. 

 Hasse, Bull. Torr. Club xxiv. 448 (1897). 



