144 COMPOSITAE 
1. Dicoria canéscens A. Gray. nent Dicoria, Fig. 5211. 
Dicoria canescens A. Gray in Torr. Bot. Mex. Bound. 87. pl. 30. 1859. 
Dicoria calliptera Rose & Standl. Contr. U.S. Nat. Herb. 16: 18. es i2. 1912. 
Coarse shine, 5-10 Matte oo the stems Sao eading from the base, avant much branched, 
see clothed with upward-curved, appt ssed hairs, these tardily deciduous, and with a few 
ustulate- Secor. hispid | fae Rea lea ee cm. long, reduced as rather thick, the petioles 
m ad i 
i d 
partially winged on the ridge, the outer often partly corky, the winged margin one-half or more 
the width of the body of the achene, with broad, ic lidate or bp es > fakes ually | straw-colored, 
thickened toward the base 
In sand, Lower Sonoran hase lege and Imperial Counties, California, southwestern Arizona, and north- 
bela Sonora. co locality; “Tn the andy desert of the Gila and of the Colorado. ” Collected by Emory. Oct.- 
Dicoria canescens subsp. hispidula Beck, Aliso 4: 101. 1958. (Dicoria hispidula Rydb. N. Amer. FI. = 
12. 3922.) ig a D. canescens subsp. canescens and D. ‘clarkiae, Sas: pubescence of the ste m mu ch the same 
body < the achene. In sand, Lower Sonoran Zone; brani Mojave Desert, “california, south through t 
chella Valley. Type locality : Whitewater est. Riversi de County. Differing princi ally by the more Priefer 
ee and narrower margins of the a es. Growing with D. canescens in the Coac ella Valley. 
oblongifolia i N. Ace Fl. 33: 12. 1922, is said by Rydberg to grow i southern California and 
ices Califtrni nia. Soh s some question about the area in which the type of nia oO 7 Bale was Greg neg on 
almer (n 
numbers, many of them from the Mojave Déeiert a io The type locality, > ay cou George, Utah, if the 
year given on the label is correct. If it is not, the type locality could be the Moiave Desert. The achenes of the 
ae are about 5 mm. long, the margined lobes about 0.5 mm. oy delat double-toothed, darkened at the base, 
somewhat hairy or glandular- dotted. 
2. Dicoria clarkiae Kennedy. Clark’s Dicoria. Fig. 5212. 
Dicoria clarkiae Kennedy, Muhlenbergia 4: 2. fig. 1908. 
Dicoria canescens subsp. clarkiae Keck, Aliso 4: 101. 1958. 
Coarse annuals up to 7 dm. high, stems spreading from the base and branching above, striate, 
poate upward-curved Sais and some longer appressed hairs, becoming scabrous in age. 
Upper leaves 1.5-5 cm. long, the petiole about one-half or less the length of the blade, broadly 
ove 
er 3 (20 -mar- 
gined; achenes 5-6(7) mm. long, the body of the achene mostly 2 mm. wide, , more often 
more or less oblanceolate, inner surface brown, flat, 1-nerved or ridged, — peta mina 
often glandular-dotted and sparsely hirsute, the outer rounded, ri ay ed, bro — — be by 
moe cas e or less gland-dotted and sometimes hirsute, the ma n0. 
more at base e achene, peg: venly or unevenly lobed ae toothed, acc anne ae 
ened whine eked to the body eens. 
In sand, Upper Sonoran Zone; act Cou Nevada, to Inyo County, Savors, and adjacent San 
Bernardino County. Type locality: Soda Lake, Churchill ice 3 ed i. Oct.—Nov. 
Seemingly merging with Dicoria fog aioha subsp. hispidula in its southern When life-cycles 
ae all the species of Dicoria are thoroug studied, artinelae with po possibility rm on of Dn of the 
nged margins of the achenes, more sae Sete change may become necessary. 
22. HYMENOCLEA Torr. & Gray ex A. Gray, Mem. Amer. Acad. II. 4: 79. 
184 
Monoecious or subdioecious shrubs with white or straw-colored bark and greenish, 
striate, glabrous or sparsely hispidulous, more or less resinous branches. Le alternate, 
filiform or linear-filiform, entire or pinnately few-lobed with filiform np emir gree 
volu 
ike tie panicles. Stamin te heads a 5-flowered ; Gaivaucre saucer-shaped or turbi- 
— of —— 5-6 mos eo ov: er acre yllaries united about to middle. Receptacle 
few spatulate, set lar, and ciliate, membranous bracts. Pistillate involucre 
purse ubenaed by 1-3 usually ovate and subherbaceous or mostly scarious phyllaries, 
