174 COMPOSITAE 
1. Hemizonia clementina pie Catalina Tarweed. Fig. 5270. 
Aiseesip —— rl ease vghaie| Erythea 7: 70. 18 
Davids. & Moxley, Fl. S. uc 401. 1923, 
Shrub 3-8 dm. hi vga ith many erect, ascending or decumbent branches from base, densely 
read es, kas older “eaves deciduous ; : he rbage siahaeks hirsute, viscid. Lower leaves opposite, 
arrowly linear, 3-8 cm. long, 1.5-6 mm. wide, reineels tate; upper leaves alternate, entire, 
with pee, or lea i shoots in their ie heads ound cymes; involucre broadly cam- 
panulate to ve c, 5-8 mm. high; ray- -flowers 134, ie nae yellow, 4.5-6.5 mm. long; 
receptacular bracts in 3 mae disk. acne 18-30, t central 0 ed without bracts; ray-achenes 
2-3 mm. long, emauee a the minent Pes beaks and one-half to three times 
as long as thick; disk-achenes or i i a of 7-10(- 2 linear- il attenuate, fimbriate, 
unequal paleae 1-3 mm e. 
In hea oils, Upp one; Anacapa, San Nicholas, and Santa Barbara Islands, Ventura County, 
pug San Clemente a sare vpn Islands, Los Angeles County, California, Type locality: San Clemente 
2. en minthornii Jepson. Santa Susana Tarweed. Fig. 5271. 
thornii Jepson, Man. Fl. Pl. Calif..1092. 1925. 
Shrub 6-10 dm. high, 10-30 dm. wide, with up to 500 stiff, woody, ascending stems from bas 
herbage short- hirsute, paar fragrantly resinous. gene esa alternate, somewhat thickened, like = ai 
of seam tina; heads mostly solitary on long peduncles, racemosely or corymbosely paniculate ; 
46 8; i : oe mm. ee: 
olucre 5. m. hi mm. al r 
receptacular bracts in about 3 series; disk-flowers 18-23, each subtende a bract; ray-achen 
.5-3 mm. long, smooth, the beak scarcely longer than thick; disk- rn Beate but Saat 
pappus of 8-12 linear, more or less fimbriate, subequal paleae 1.2-2.6 mm. long. 
Dry tr slopes, Upper Sonoran Zone; Santa Susana ia, Ventura County, California, the type 
locality. July— 
3. Hemizonia kelloggii Greene. Kellogg’s Tarweed. Fig. 5272. 
ements aoe Greene, Bull. Torrey Club 10: 41. (Apr.) 1883. 
ighttti A. Gray, Proc. Amer. Acad. 19: 17. (Oct.) 1883. 
Sear kellogait eas Fl, eh ran. 424. 
Deinan ndra a wrightit Greene, loc 
ia wrightit var. " Rellogoti ak Man. FI. Pl. Calif. 1090. 1925. 
em 2-10 dm. high, corymbosely branching above or nae pes by pennchens ow ohion soft- 
above 
eae at base, hispid-hirsute and aged eerie aves narrowl long, re- 
—— sharp oe ed or ey tifid, m. long, 3-10 mm. bide 0 iene leaves entire; 
open panicle or thyrse; Ltchecre 4-5.5 mm. long, 3. mm. wide, densely stipita wie: 
eee tk usualy caseunre ligules 4-7 mm. long, 3.5-5.5 mm. wide; pappus of 6-12 white, linear 
to oblon g palea 
Dry nage hillsides, Upper Sonoran Zone; San Francisco Bay region south through the San Joaquin and 
Coast Res poked to San Diego County, California; adventive in Mendocino, Colusa, and Imperial Counties. 
Type locality: near Antioch, Contra Costa Cou . April- —July. 
4. Hemizonia pallida Keck. Kern Tarweed. Fig. 5273. 
Hemizonia pallida Keck, Madrofio 3: 8. 1935. 
Ste m 2-8 dm. high, branching above or throughout with ascending or divergent branches, whit- 
ish or reddit herbage villous-hirsute and hispidulous, lightly g 55 eS Bess ildly odoro ~ 
Lower leaves linear xg Sehlas nceolate, epee — a cleft, 5-10 cm. long, 3-6(-10) m 
wide, the bes pper o oming entire ; Reta th as re 4.5-6 .5 mm. bi 
5-8 mm. wide, hispid-hirsu ute and Ri sate & stipitate-glanduiar tigales 6-10 mm. long, 3-5 mm. wide 
pappus of 4-8 narrow distinct paleae 0.8 m r less lon 
Dry plains, U mee Sonoran Zone; head of “58 tioned Valley, California. Type locality: 5.3 miles north 
of Grapevine, Kern nty. April-May. 
5. Hemizonia arida Keck. Red Rock Tarweed. Fig. 5274. 
Hemizonia arida Keck, Aliso 4: 109. 1958. 
Stem 2-4 dm. high, intricately corymbosely caer peep herbage hispid-hirsute 
and hirsutulous, ‘lightly glandular and mildly odor Leaves about as in pallida; heads numer- 
ous, cymose-paniculate ; involucre 4 mm. high, 5 mm. n wide, Bispid Sieve aw stipitate-glandular ; 
ligules 5-6 mm. renee 3-4 mm. wide; pappus vestigial o 
oe —S sandy canyon-bottom, ere aes Zone; Red Rock Pi te: Sas County, California, the type locality. 
ay~ 
ee Hees corymbésa (DC.) Torr. & Gray. Coast Tarweed. Fig. 5275. 
Cc 
Hartmannia cor DC. op. cit. 694. 
sa Torr. & Gray, Fl. N. Amer. 2: 398. 1843. 
slemizonia deculiens Nutt. Journ. Acad. Phila. II. 1: 175. 1848. 
