348 | COMPOSITZ HARPRCARPUS 
HEMIZONELLA 
50 HARPACARPUS Nutt. 1. c. 
Small annuals with entire narrow leaves and numerous small 
heads of inconspicuons flowers. Heads few-flowered; ray-flow- 
ers 3-8., pistillate, in a single series, each enclosed in one of the 
carinate-complicate and lunate bracts of the involucre; disk- 
flower solitary, tubular, perfect and fertile, surrounded by a 5- 
angled and 5-toothed cup formed of the united scales of the rece- 
ptacle. Corollas glabrous; of the ray scarcely exceeding the in- 
volucre, tubular below, cleft anteriorly ; of the disk funnelform, 
5-toothed. Branches of the style in the disk-flower short, lan- 
ceolate-oblong with barbellate-hispid margins. Achenes glabrous 
much compressed, without pappus; of the rays obovate-lunate, 
gibbous, the incurved summit produced into a short ascending 
beak, when mature falling with the bracts of the involucre that 
enclose them; that of the disk semiobovate, straight, with a trun- 
cate terminal areola, enclosed by the united chaff. 
H. madarioides Nutt.1. c. Madia filipes Gray. Stems slender, 4-12 
inches high, hirsute, glandular above, paniculately branched : leaves alter- 
nate, narrowly linear, 1-2 inches long: heads numerous, 1-2 lines high, on 
long filiform peduncles : bracts of the involucre 4-8, lunate and strongly 
carinate in fruit, almost destitute of free tips, hispid and glandular: bracts 
of the receptacle united into a 3-5-toothed cup. Commonin open woods, 
Brit. Columbia to California. 
51 HEMIZONELLA Gray Proc. Am. Acad. ix, 189. 
Little annuals with mostly opposite leaves and numerous small 
heads of inconspicuous flowers. Heads few-flowered, heterogam- 
ous; the rays 4-5, pistillate; the disk-flower solitary, or rarely 
2 or 3, perfect and fertile. Bracts of the involucre herbaceous, as 
many as ray-flowers, each infolded and completely enclosing its 
achene but rounded on the back and usually flattish on the inner 
face. Chaff of the receptacle an herbaceous 3—5-toothed cup en- 
closing the disk-flowers. Corollas glabrous or merely glandular: 
rays very short. Achenes obovate or fusiform, more or less ob- 
compressed and thos2 of the rays incurved, the small terminal 
areola oblique, either sessile or raised on a short beak. Pappus 
wanting. 
H. Durandii Gray 1.c. Hirsute with white hairs and glandular above: 
stems 1-6 inches high, diffusely much branched: leaves linear, about 6 lines 
long: earliest heads usually in the forks of the branches, slender-pedunc- 
led; thelater ones racemose, 2-bracted at base, short-peduncled: achenes 
slightly hairy; those of the ray obovate-oblong and obcompressed, tipped 
with a short inflexedbeak. Ondry hills and gravelly bars, Oregon to Cali- 
fornia and Nevada. 
52 HEMIZONIA DC. Prodr. v, 692. 
Low annuals with alternate often crowded leaves and middle- 
sized heads of yellow or white ray-flowers. Heads several to 
many-flowered: rays 5-20, ligulate, 2-3-lobed, pistillate : those of 
the disk tubular, perfect but sterile, 5-toothed, the teeth mostly 
