CA^ALOGITE. 177 



and somewhat corymbose above, hispid with rigid spreading hairs ; the 

 branchlets, leaves and involucres also sprinkled with stalked blackish glands ; 

 leaves oblong-linear, about 1' long, obtuse, entire ; heads 1' or more broad; rays 

 8-12, white, 3-lobed at the end ; pappus very white, awns about 10, as long 

 as the achenium and one-half longer than the copious spreading hairs at 

 their base. — Plant 4-10' high ; disk-achenia villous with appressed hairs. 

 Oregon and California ; Western Nevada, (Bloomer ! Anderson !) Valley of 

 Salt Lake, (Stansbury.) Valleys and foot-hills throughout Nevada, and east- 

 ward to the Wahsatch; 4,200-6,500 feet elevation ; April-July. (622.) 



Layia HETEEOTEiCHA, H. & A. Much like the last, but commonly a 

 larger plant, 10-15' high ; the pubescence shorter and harsher, the blackish 

 glands sometimes very few ; leaves larger (1-2' long) and often toothed, 

 especially the lower ones; rays yellowish-white, 8-12, broadly wedge-shaped 

 and 3-cleft at the apex ; achenium and pappus as in the last. — California. 

 Western Nevada to Salt Lake City, 4,500-6,000 feet elevation ; April- 

 June. (623.) 



Hemizonia^ Dueandi, Gray. Proc. Amer. Acad., 6. 549. A small 

 hispid branching annual, 3-6' high ; leaves mostly opposite, narrowly linear, 

 3-6" long, sessile ; heads very small, (1 J" long,) short-peduncled ; involucre 

 globose-pyriform, of 5 glandular-hispid concave and convolute scales, which 

 enclose the ray-achenia ; ligules broadly cuneate, 3-lobed ; disk-flowers 1 or 

 2, enclosed in the half-united chaff; ray-achenia arcuate-gibbous, with a very 

 short inflexed beak ; disk-achenia straight, oblong-clavate, hairy ; pappus 

 none. — California, (Pratten, Eattan !) Washoe County, Nevada, (Stretch.) 



hairs, or ciliate-setigerous, rarely naked. — ^Annual or biennial herbs of California, etc., glabrous, or 

 mostly hairy or glandular, the opposite or alternate leaves usually pinnately cleft or lobed, the upper ones 

 entire. Heads rather large and showy, the rays white or yellow ; anthers dark-colored. The Utah and 

 Nevada species both belong to the section Madaroglossa, which has the awns of the pappus setiform, 

 viUous-woolly or plumose toward the base, with very long and slender hairs, the receptacle chaffy only 

 between the outermost disk-flowers and the ray. 



1 HEMIZONIA, D C. Heads few — many-flowered, radiate ; rays 4-20, pistillate ; ligule 2-3-lobed ; 

 disk-flowers perfect, usually infertile, the tubular-funnel-shaped corolla 5-toothed. Involucral scales in 

 one series, concave and partly enclosing the ray-achenia. Eeceptaole flat, more or less chaffy, the chaff 

 sometimes united in a cup. Branches of the style linear, in -the ray glabrous, in the disk with a very 

 hispid subulate appendage. Achenia of the ray glabrous, gibbons-incurved, more or lees obcompressed, 

 without pappus ; of the disk commonly abortive, oblong, often with a pappus of short lacerate chaffy 

 scales. — Low Californian annuals, with narrow, usually alternate leaves, and small heads of yellow flowers. 

 The singlejspeoies reported from Nevada is of the section Hemizonblla, Gray, I. o. — Eays 4-5, the ligule 

 very small, scarcely longer than the style. Disk-flower single, or at most 2, enclosed in a 3-5-toothed 

 cup, formed of the united chaff of the receptacle ; achenia all fertile, those of the ray somewhat obcom- 

 pressed, inourved-gibbous, of the disk straight. 



23 



