182 COMPOSITAE 
22. Hemizonia lutéscens (Greene) Keck. Sonoma Tarweed. Fig. 5291. 
Hemizonia luzulaefolia var. mee Greene, Bull. Torrey Club 9: 16. 1882. 
Hemizonia congesta subsp. lutescens Babe. & Hall, Univ. Calif. Pub. Bot. 13: 38. 1924. 
Hemizonta congesta var. hemes = Man. FI. Pl. Calif. 1089. 1925. 
Hemiszonia lutescens Keck, Aliso 4 
Ste robust, 2-7 a high, usually much branched from the base upward; herbag 
dark- ni peo ay inflorescence or throughout, heavily scented; basal rosette at first eon 
nent. Leaves short and narrow (up to cm. long an mm. wide), often silvery-vill ith 
long cobwebby hairs; heads small; involucre 4.5—5 mm. high, the tips of the phyllaries shorter 
than on body ; ray-flowers deep yellow. 
Grassy valleys and hillsides away from the immediate coast, Upper Sonoran Zone; southern 5 i ions hang 
County rs sin and Alameda Cities: Cities, Type locality: San Pablo, Contra Costa County. July—Nov 
23. Hemizonia tracyi (Babc. & Hall) Keck. Tracy’s Tarweed. Fig. 5292. 
Hemizonia congesta subsp. tracyi Babc. & Hall, Univ. Calif. Pub. Bot. 13: 46. 1924. 
Hemizonia congesta var. 6 sigh atime Man. FI. Pl. Calif. 1089. 1925 
Hemizonia tracyt Keck, Aliso 958 
Stem slender, 1.5-6 vv hi bi sik mple or openly few-branched above, — villous or 
merely densely puberulent ; herbage s oft- seen glandular ant aroun ne the Ea Leaves not 
crowde a basal asi grass-like, very n w, the lower up to 15 cm. lon 
bright ah hes ds mbo se, relatively aig piel e 5-7 mm. high, cin ts of the phyllaries 
shorter cs the body + eet, chenes one- “half to 3 fiths as broad as lon 
and forest Humid Transition Zon uthern Humboldt and nort thik n Mendocino Coun- 
pees Hie Poh Type lochkitey pales of t the Van Predets River’ lapouitk Buck Susie. Humboldt County. May-— 
24. Hemizonia luzulaefélia DC. Hayfield Tarweed. Fig. 5293. 
Hemizonia peat saben, DC. Prod. 5: 692. 1836 
Hemizonia sericea k. & Arn, Bot. Beechey Suppl 3 
Hemizonia ano. var. fragarioides Kell. Proc. Sess pare 2: 69. 1860. 
i 7 rams © 
Hemizonia congesta subsp. Iuziulaefolia Babe. & Hall, Unite. Calif, Pub. Bot. 13: 43. 1924. 
Hemizonia congesta var. luzulaefolia Jepson, Man. F1. Pl. Calif. 1089, 1925. 
Stem slender, 2-5 dm. high, openly branching above or throughout, mostly vie es 
well down oward base, often also more or less villous; basal rosette none or obsc Low 
leaves prominent at pga oh pee “ae a 15 or more > long and to . wi ide, gieen aad 
chiefly eee ioe si i with cobweb-tomentum, not glan dul is rs heads sho owy; 
involucre 5—6 mm. high, che tips oe ‘the Shllarics shorter than the body; ray- -achenes about one- 
half as pre as tae 
Open ground, coastal valleys and foothills, Seve Sonoran Zone; Lake County to San Luis Obispo County, 
California. Type locality: peste April-Jun 
Hemizonia luzulaefo subsp. ridis (Benth.) Keck, Aliso 4: 111. 1958. (Hemizonia rudis Benth. Bot. 
Sulph. 31. 1844.) More poe 2-8 dm high, a ear and den sely gla ndular-viscid througho out; basal rosette 
h m r of the secti 
.5—-5 mm. high. e most widespread and abundan tion, in st polenelds and pastures peer 
Sonoran Zone; Sacramento ewig —— Tehama County “‘ Boas Joaquin County, Coast Range valleys fr. ake 
County to Santa Barbara Cou ery rare north of = noma County, and in Monterey County, California. Type 
locality: Santa Clara, Santa Clara County. July—Nov 
25. Hemizonia congésta DC. Hayfield Tarweed. Fig. 5294. 
Hemizonia ets. ate DC. Prod. 5: 692. 1836. 
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but ina silly, saci viscid toward heads but the glands us sually obscure ; 
or Lo leaves usually prominent at. abthests: remotely denticulate ; heads small 
terminal clusters or solitary at t he e ends of the short branches and often a few watt: nerd 
heads; involucre 6-9 mm. high, the tips of the cay iteeles Datialine to acs peiedind the body ; 
iy sechieties aosily three-fifths as broa 
Fields near the coast, Humid Transition—Zon : Del Norte County to San Mateo County, California, but fre- 
quently only in Sonoma and iris Pounties Type ages: California. May—Oct. 
26. Hemizonia calyculata (Babe. & Hall) Keck. Mendocino Tarweed. Fig. 5295. 
Hemizonia —— subsp. calyculata Babe. & Hall, Univ. Calif. Pub. Bot. 13: 42. 1924. 
Hemizonia c a var. calyculata Jepson, Man. F1, Pl. Calif. 1089. 1925. 
Hemizonia orecanee Keck, Aliso 4: 111. 1958. 
Stem 2-8 dm. high, divaricately branching above; herbage moderately villous and densely 
glandular-pubescent, the dark stalked glands abundant in pod inflorescence. Lower leaves not 
recent at preg Erect osiats ies cm. long, 2-5 mm. wide; heads terminating — 
stiff peduncles, the floral bracts crowded, ending to surpass Phe he ads ; involucre 6-12 m 
~~ ae tips of the phyllaries exceeding t a body; ray-achenes one-half to three-fifths as beted 
Ids and open hillsides, r+ Sonoran Zone; Lake and southern Mendocino Counties, California. 
Type boa east of Orr’s Springs, isis Md ino County. July—Oct. 
