114 COMPOSITAE 
hirsute to _sokespet patent sung cusp of chaff usually conspicuously exceeding disk-flowers in 
length, “ brous at apex; rays 10-17; x obes of disk-flowers reddish purple or yellow; achenes 
; re eo minu ae aes, i, 
Dry banat Upper Sonoran and Transitior ion Zones; Josephine and Jackson Counties, Oregon kag to es 
and San Luis Obispo Counties, California. Type locality : geysers in Lake County, California. y-Nov 
3. Helianthus petiolaris Nutt. Prairie Sunflower. Fig. 5157. 
Helianth iolars. . Journ. Acad. Phila. 2: 115, 1821. 
Helianthus pate pce gr Sem. Hort. Hamb. 8. 182 . 
Helianthus ropes var. humilis Mace in Neu iad. Reise N.-Amer. 2: 441. 1841. 
Helianthus integrifolius Nutt. Trans. Amer. Phil. Soc. IL. 7: 366. 1841. 
Helianthus integrifolius var. gracilis Nutt. loc. cit. 
Helianthus petiolaris patens Rydb. Mem. To: orrey Club 5: 334. 1894. 
Helianthus petiolaris var. phenax Cockerell, Nature 66: 174. 1902. 
Helianthus aridus Rydb. Bull. Torrey Club 32: 127. 1905, in part. 
nnual, 0.4-2.0 m 
nate, das ane to che entire or aos: ee serrate, ee ate to truncate at base, 
blade 4. -0 cm. long, 1.0-10.0 cm. wide, strigose on both surfaces, frequently bluish green 
in color, petiolate; disk 1.0-2.5 cm. in diameter ; phyllaries lanceolate to ovate-lanceolate, his- 
pidulous on backs, acto ate on eel se, mm. broad; middle cusp of chaff not con- 
spicuously exceeding disk-flow thos center densely white- hispid or Dg pi Ay apex; disk- 
flowers reddish p wc Te sa i lightly. a ae 3.5-4.5 mm. long; pappus = 17, 
Sandy soils phe waste a, a tee and Minnesota to wvltate south to shes iid eaterart Mexico. 
Type locality: Upper Missouri River. J ov 
Helianthus petiolaris var. canésc gdh Contr. 35: 108. 1852. (Gymnolomia encelioides 
A. Gray, Proc. Amer. Acad. 19: 4. 1883; * Helianthis ee pani wh Laing Torrey Club 5: 334. 1894; 
H. canus Woot. & Stand. Contr. U.S. Nat. Herb. 16: 190. 1913.) Lea stems, and involucres densely strigu- 
lose or canescent; middle cusp of chaff facpay hispid to densel ely ciliate ers Dias sandy goa Lower Sonoran 
Zone; Texas to southern California and northern Mexico. Type locality: southwestern Tex 
4, Stelianthne tephrodes A. Gray. Desert Sunflower. Fig. 5158. 
os adage hi Gray in Torr. Bot. Mex. Bound. 90. 1859 
A. Gray, Bot. cat 1: 354. 1876. 
a i des A. ao Amer. Acad. 17: 218. 1882. 
g ‘onorae eee eee he Contr. N.S. Nat Bact: 16: 20. pl. 16. 1912. 
Perennial from _— taproot, erect or decumbent, 1.0-1.5 m. bein stem appressed sericeous- 
villous. Leaves alternate above, deltoid or dchhiad abate: 3; gt Oc Beer ng, 2.0-4.0 cm. broad, 
appressed white pettslnerner ol petiolate ; aes 1.42.8¢ a diset ie chapel lanceolate, 
evenly appressed sericeous-villous, —4.0 mm. wide; a le of he cor rlla reddish purple ; achene 
7-8 mm. non densely villous with long are pappus s of 2(-3) long a and erat squam alae. 
Lower Sonoran Zone; Imperial Cosas, California, and a es Sonora. Type locality: 
Colorado ee of California. “Feb. —May 
This species has previously been Sontabed with H. niveus (Benth.) Brandg. of Lower California. 
5. Helianthus graciléntus A. Gray. Slender Sunflower. Fig. 5159. 
Helianth ilentus A. Gray, Proc, Amer. Acad. 11: 77. 1876. 
Peiaint from thickened r 1-2 m. tall; stems strigose-hispid or rarely glabrous. Leaves 
opposite to near inflorescence, vatantihig ‘to lance- ovate; blades 5-11 cm. long, 2-3.5 cm. wide, 
hispid both surfaces, subsessile or with petioles to 3 cm. long; disks 2.0-2.5 ne wide; Sieikarins 
lanceolate to lance-ovate, equal to or shorter than ey puberulent, 2.5-3.5 m m. br oad; lobes 
of disk-corolla yellow or reddish purple; achene about 4 mm. long, glabrous. fi 
Dry slopes, Upper Sonoran Zone; Contra Costa County, pati south to northern “peck California. Sea 
level to fy 000. ries Type locality: San Diego County, California. May—Oct. 
6. Helianthus ciliaris DC. Blueweed. Fig. 5160. 
Helianth iliaris DC. Prod. 5: 587. 1836. 
Helianthus eas oe Gray, Mem. Amer. Acad. II. 4: 84. 1849. 
Perennial from long stout rhizome, 0.5-1.0 m. high, glaucous, glabrous or rarely hispid. 
Leaves mente oO pposite, linear-lanceo sail ie lanceolate, entire to laciniate, usually somewhat un- 
e on margins, glaucous, bluish g or, subsessile; stems monocep halic or with few 
lat 
py disks 0.9-2.0 cm. wide; dhyllaries jo winaony sects than disk: rays short; lobes of 
disk-flowers reddish An th achene ¢ s _ lon — i | ees a 
te place s Achocas ena ab tral aa co. This species is an extremely trou! 
PEE pom | pose Fo og ey «th geo. was BP cchiiched in Tehama, San "take a Santa Barbara, Ventura, Orange, = 
Los Angeles Doteine, California, but appears to have been largely eradicated. Type locality: near Reynosa de 
Tamaulipas, Mexico. 
7. Helianthus cusickii A. Gray. Cusick’s Sunflower. Fig. 5161. 
Helianthus cusickti A. Gray, Proc. Amer. Acad. 21: 413. 
Perennial from thick fleshy root; stems glabrous or with scattered long hairs. Leaves mo ostly 
ahernate, linear-lanceolate to lanceolate, frequently strongly 3-nerved, entire, scabrous-hispid 
