362 PROCEEDINGS OF THE AMERICAN ACADEMY. 
1903, Jones (N). SoNoRA: common on plains from Huerigo to 
Granada, Guasabas, alt. 915-1220 m., 15 Nov. 1890, Hartman 233 
(GN); Hermosillo, 10 June 1897, F. S. Maltby 229 (N); Torres, 10 
June 1897, Maltby 179 (N); El Grupo (?), 13 Nov. 1895, MeGee (N); 
hillsides, Guaymas, July 1887, Palmer 111 part (GN); Hermasillo, 
4 Mar. 1910, Rose, Standley, & Russell 12354 (N); Empalme, 11 Mar. 
1910, Rose, Standley, & Russell 12625 (N); Carral, 12 Mar. 1910, Rose, 
Standley, & Russell 12651 (N); Guaymas, 23 Apr. 1910, Rose, Stand- 
ley, & Russell 15051 (N); Magdalena, 25 Apr. 1910, Rose, Standley, & 
Russell 15098 (N); Srvatoa: thickets along Rio Fuerte, San Blas, 24 
Mar. 1910, Rose, Standley, & Russell 13365 (N).— The only Encelia 
of any economic importance, and that but slight, the resin being 
burned as incense in the churches of Lower California, giving the 
plant the local name of “ Incienso” (Brandegee, Zoe i. 83 (1890)). 
. E. rartnosa Gray f. phenicodonta Blake, n. forma, disco 
purpureo. Disk-corollas purple above; otherwise as in the typical 
form.— Specimens examined: Ca.irornta: Riverside Mt., Newberry 
(G); Arizona: Williams Fork, Mar. 1876, Palmer 251 (FN). Lower 
CALIFORNIA: west side of Lake Maquata, Colorado Desert, 27 Jan. 
1890, Orcutt 2023 (N); cafion near San Quentin, 22 Apr. 1886, Orcutt 
1341 (corypEs in FGN); old diggings, Calmalli, alt. 366 m., Jan.— 
Mar. 1898, Purpus 33 (FN); La Paz, 20 Jan.—5 Feb. 1890, Palmer 
50 (N); Santa Rosalia, 24 Feb.-3 Mar. 1889, Palmer 186 (GN); 
Sonora: Papago Tanks, Pinacate Mts., 14 Nov. 1907, MacDougal 
(N); hillsides, Guaymas, July 1887, Palmer 111 in part (GN). 
3y. E. rartosa Gray var. radians Brandeg. in herb., n. comb.— 
Leaves glabrate or nearly so; involucre nearly or quite glabrous, its 
bracts chiefly linear-oblong; disk purple. 
Encelia radians Brandeg. Proc. Calif. Acad. ser. 2. ii. 176 (1889). 
Specimens examined: Lower CaLirornta: San José del Cabo, 
Mar.-June 1897, Anthony 433 (GN); same locality, Jan-Mar. 1901, 
Purpus 398 (GN). 
+ Heads few or solitary; peduncles usually muy stem leafy. 
+ Shrubby, even the branches woody; heads solitary at tips of long nake d 
usually scabrous aiid oe the branches, often dissed disk 
yellow; awns often prese 
4. E. FRUTESCENS ee 35 A low much branched shrub, 1.3- 
1.6 m. high, white with a dense short very scabrous pubescence at least 
_ 35 Often —— with Viguiera Parishii Greene, which is rather — 
in aspect but has mostly opposite cordate-deltoid leaves and a pappus ° 
squamellae m well as awns. 
