178 COMPOSITAE 
glomerules Sapient short leafy branches and sometimes a few solitary heads below; other- 
wise similar to ramosissima 
py pean plains, 7 il Sitarkh Zone; frequent in California from San Luis Obispo County to Riverside 
Coun se ndant thence to a California. Type locality: ‘‘Nova-California.” Collected by Douglas, probably 
near natn Barbara. May—Sep 
13. Hemizonia cénjugens Keck. Otay Tarweed. Fig. 5282. 
Hemizonia conjugens Keck, Aliso 4: 109. 1958. 
Stem 2-5 dm. high, branching as in fasciculata ; pees ge and involucres bah hirsute and some- 
times Rapithane: erie | : ade inv ee bearing large, flat and s mall, capitate, sessile or sub- 
aii glands; heads solitary on short peduncles or edecesite in tw heated glomerules; ray- 
flowers 8-10; di sk-flowers 13-21. 
Dry mesas, rper Sonoran Zone; southwestern San Diego County, California. Type locality: river bottom 
near Otay. May- June 
14. Hemizonia LS pei Gray. San Diego Tarweed. Fig. 5283. 
Hemi. paniculata A. Gray oc. Amer. Acad. 19: 17. 1883. 
Deinandra paniculata Davids. & a FL. S. Calif. 401. 1923. 
Ste 2-8 dm. high, the central shaft displaced about midway by numerous ascending branches 
which ramify to form a twi inflorescence; herbage moderately hispid-hirsute (especially 
1] 
e 
mged to ‘amg nas sharp-toothed or pinnatifid with entire or dentate lobes, 1.5-8 cm. long, 
; i pedunc ucre S mm. hi i 
ra) 
ie) 
- 
s 
85 
7 
ma 
ae 
BS 
Qa 
2 
< 
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Let 
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. 
to gh, 5-7 mm. wide, the 
‘ovine dottenis Sear cane cent; ray-flowers 8; disk- 8-13; disk-achenes ae 
pubescent, sere pil and Se clotel, the majority te. pene pale; pappus of 6-12 white, 
oblong, fimbriate palea 
Dry hills Ey. fe ae Sonoran Zone; western Riverside County to San Diego County, Paliprnia, and 
~~ ern Lower cS Type locality: near Siineculs, ‘Riverside icrtitey (lectotype). May—Nov 
onia paniculata subsp. incréscens Hall ex Keck, Madrofio 3: af 1935. Plants erect or somewhat 
spnendinn “deep green, even the ailtimate twigs rather reid (never capillary); ray-flowers 8-13; disk- overs 14- 30. 
Abundant in fields near the coast, Upper Sonoran Zone; nterey fone to Santa Barbara Count ty and on San 
Rosa Island, Santa Selene Counts. California. Type lo ae 7.5 miles southwest of Arroyo Grande, San tne 
Obispo County. May—Nov 
15. Hemizonia floribinda i Gray. Tecate Tarweed. Fig. 5284. 
Hemizonia floribunda A. Gray, Proc. Amer. Acad. 11: 79. 1876. 
Deinandra floribunda Davids. & Moxley, TL. S$. aks 401. 1923. 
Stem 3-10 dm. high, corymbosely branched above or throughout with strict say 
branches; herbage moderately pil ose and densely ek Poets -glandular throughout, mildly tag 
Leaves mostly entire, the lower oblanceolate, the middle cauline linear-lanceolate, 1,53 ¢ Gare 
2-3.5 mm. wide; heads short-peduncled, in Sesage ely _compoun cymes o a dome Ne a glo- 
merate ; involucre 5-6 mm. high, 6-7.5 mm. wide, soft- chee and very g tohdu ar; ray-achen 
13-20; disk-flowers about 28, their achenes all ae aaeity Pag sapens of 6-9 oblong or elliptic, 
closely fimbriate, rufous and flecked paleae. 
Dry hills and montane valleys, Upper at oran Zone; southern San Diego County, California, and adjacent 
be California Sei Jo locality: California, near the so uthern boundary, on the Fort Yuma road, 80 miles anal 
an Diego. 
16. Hemizonia pingens (Hook. & ag ty _ & Gray. Common Spikeweed. 
Fis. 
——— i sie > sd Hook. & Arn. Bot. Beechey Sy 357. 1838. 
orr. & Gray, Fl. N. Amer. 2: 399. 1843. 
Centromadia vet Greene, Man. Bay Reg. 196. 1894. 
Hemizonia pungens subsp. interior Keck, Madrofio 3: 14. 1935. 
Stem 1-12 dm. high, divergently and rigidly heat oc! oan or throughout, leafy, sparsely 
to copiously hirsute, not gla iy - herbage yellowish green, inodorous. Basal leaves linear- 
lanceolate in outline, $15 c . long, 10-40 So wide, bipinnately parted into segments; upper 
cauline leaves with fascic age in her axils, mostly entire, spine-tipped, stiffly ciliate and sca- 
brous-puberulent ; heads apheepils in upper axils and terminal; involucre hemispheric, ae mm. 
y bracts i i 
> sie 
disk-flowers numerous, the ligules only 2-toothed; ray-achenes angular, often rugose; > ihiak. 
achenes in part pea "the fertile ones more or ‘tee ‘fusiform. 
Dry valley floors, Upper Sonoran Zone; S n Joaquin Valley from San Joaquin County to Kern County and 
Selina Valley. Culitdvnins introduced in Los ‘Auieeles, San Bernardino, and San Diego Coates and in northern 
Oregon. Type locality: Caines ese Oct 
Hemizonia poneens (Gee Keck, Aliso 4: 110. 1958. (Centromadia maritima Greene, 
Man. Bay Reg. igs 1894.) Brant, fa fairly ion. the branches usually iia uete ~ strict; leaves and bracts not 
scabrous; heads lomeru! mbers, large. Salt marshes and valley land around San Francisco Bay 
south to nort nactnese onterey Cocky me i ast to San Joaquin and Yolo Connties: Coitermie Type locality: 
Alameda, has apy ch 
Hemizon he septen a Bone ig Aliso 4:110. 1958. Plants large, the so ogee fring noe 
and often oe ghee pe bracts not scabro scattered, small. Dry ground, Upper Sonoran Z Sacra- 
mento Valley’ and feng 3 Valley, California: aah ee in northern Oregon and Washington. icin locality : 
Shi alley, Siskiyou County. 
