COMPOSITE. 425 



* * Virgatelij racemose species: all the flowers mblended by bracts; 

 disk-achenes with no pappus (except in ii. 6). 



4. D. viraruta. Hemizonia virgata, Gray, Bot. Mex. Bound. 100 

 (1859). Neaiiy or quite glabrous, 2—4 ft. high: flowering branchlets 

 very leafy; their leaves short-liuear, a line long, glandular-truncate: 

 bracts of oblong involucre also ending in a truncate gland, and stipitate- 

 glandular on the back: disk-tlowers 7 — 10. — Plains of the Sacramento 

 and San Joaquin, a weed of fields and waysides. Jaly — Sept. 



5. 1). Heerinaiiiii. Heviizonia Heermanni, Greene, Bull. Torr. Club, 

 ix. 15 (1882). Viscid and pubescent, heavy-scented, 1—3 ft. high: minute 

 leaves of the flowering branchlets scattered: bracts of hemispherical 

 involucre viscid-pubescent and beset with stalked glands; terminal 

 gland inconspicuous: disk-flowers 10 — 15. — Mt. Diablo and southeast- 

 ward. Aug.— Oct. 



fi. I). Lobbii. Hemizonia Lobbii, Greene, 1. e. 109 (1882). Habit 

 and pubescence much as in the last, but smaller and more slender, the 

 branches almost flliform: heads very narrow, and with only 3 ray- and 

 3 disk-flowers: achenes of the ray obovate-oblong; those of the disk 

 with a pappus of 8—10 linear chaffy paleae. — Common in the interior of 

 Monterey Co., about Jolon, etc. 



63, ZONANTHEMIS. Branching annuals, soft-pubescent and viscid- 

 glandular, with membranaceous pinnatifid or serrate foliage and rather 

 showy heads of yellow flowers terminating corymbose or panicled 

 branches. Bracts of involucre with long soft tips (as in Madia and 

 Hemizonia) Receptacle chaffy only next the ray-flowers, where it forms 

 a cup. Bays numerous (8—25), narrow, diurnal. Ray-achenes nearly 

 as in Hemizonia, but with some unevennessof surface (as in DeinandraJ, 

 and a short apiculation. 



1. Z. forymbosa. Hartmannia corymbosa. DC Prodr. v. 694 (1836): 

 Hemizonia coiyuibona, T. & G. Fl. ii. 398 (1843). Pubescent, viscid and 

 glandular, 1 ft. higb, corymbosely and widely branching: radical leaves 

 pinnately divided into linear segments, the uppermost linear entire: 

 heads 32 i"- liigt') 1 io- broad including the rays, these 15 — 25, oblong- 

 cuneate: beak of ray-achenes short and stout; pappus of sterile disk 

 ovaries of paleag cut into chaffy bristles, or nearly obsolete. — Plains and 

 hills about San Francisco Bay and southward. June— Oct. 



2. Z. H. an^nstifolia. Hemizonia anguKtifolia, DC. Prodr. v. 692 

 (1836). Hirsute and viscid-glandular, widely branching from the base: 



