280 HTDROPHTLLACEAE 



a slight or obscure difference in habit may be ecological. Phacelia hicolor Torr. ; Wats., Bot. King, 

 255 (1871), type loc. Carson City, Nev., Stretch; Jepson, Man. 829 (1925). There are only in- 

 constant leaf-differences between this form and P. fremontii. The corolla-scales are united with 

 the filaments for more than one-half their length in Phacelia bicolor; in P. fremontii the corolla- 

 scales are usually wholly free from the filaments, though sometimes partly united with them below. 

 This partial differentia in the scales of Phacelia bicolor and P. fremontii does not, however, seem, 

 in reality, to be important in segregating two units — in view of the fact that the two forms agree 

 in practically all features of habit and in all other details of flowers and fruit. The lack of 

 reliability in the scale character is somewhat emphasized by the entire absence of scales in some 

 collections of plants referred to P. fremontii and of others referred to P. bicolor. Phacelia fre- 

 montii seems always to have glabrous filaments, but in P. bicolor the filaments are either hairy 

 below or glabrous. The status of P. bicolor seems, at this time, uncertain on the basis of Cali- 

 fornia material. 



61. P. brachyloba Gray. Stem erect, with many branches from the base or 

 subsimple, 1 to II/2 feet high ; herbage hirsutulous, the stems glaudnlar ; leaf-blades 

 linear to oblong in outline, 1 to 2^4 inches long, coarsely toothed, piunatifid or pin- 

 nately parted, the lobes oblong, mostly obtuse, often somewhat dentate ; racemes 

 spicate, densely flowered; calj^s-lobes linear-spatulate, glandular-pubescent, 2 lines 

 long ; corolla white, or clear pink-lavender with yellow throat, campanulate, 3 to 4 

 lines long, the throat bearing an oblong-ovate areola behind each stamen and a pair 

 of smaller ones between each two of these; scales of corolla usuallj' absent ; stamens 

 included ; filaments toward base narrowly dilated downward ; style shortly cleft ; 

 capsule oblong, shorter than the calyx ; seeds inconspicuously corrugated. 



Sandy soil of caiions, washes or mountain flats, 1500 to 5500 feet : Monterey Co. 

 to San Diego Co. South to Lower California. May-June. 



Field note. — Phacelia brachyloba is a "fire plant." On Palomar Mountain, in the summer of 

 1941, after a wide-spread conflagration covering the entire east face of the mountain, it whitened 

 the slopes for miles. Of the rather numerous fire plants, it was the most abundant. This species 

 also displays similar color phenomena on "burns" in the San Gabriel Mountains. — F. W. Peirson. 



Locs. — Finches ranch, Arroyo Seco, Santa Lucia Mts., Brewer 674; Cold Springs Canon, 

 Santa Ynez Mts., A. L. Grant 1694; Ojai Valley, Euhby ; San Francisquito Pass, n. Los Angeles 

 Co., Hall 3092 ; Mt. Wilson, Peirson 160 ; San Gabriel Canon, San Gabriel Mts., C. E. Eutchinson ; 

 Cajon Pass, Jepson 6104 ; San Bernardino, Parish 3657 ; Yucaipa Hills, near Eedlands, F. M. Seed 

 2793; San Jacinto Canon below Strawberry Valley, San Jacinto Mts., Jepson 1282; betw. Van- 

 deventer Flat and Pinyon Flats, Santa Rosa Mts., Clary 985 ; Glen Ivy trail, Santa Ana Mts., 

 Munz 7055; Del Mar, w. San Diego Co., Belle Angier ; Jacumba, se. San Diego Co., Jones. 



Refs. — Phacelia brachyloba Gray, Proc. Am. Acad. 10:324 (1875) ; Parish, Erythea 6:90 

 (1898) ; Jepson, Man. 830 (1925). Eutoca brachyloba Benth., Trans. Linn. Soc. 17:277 (1837), 

 type from Cal., Douglas. P. cooperae Gray, I.e. 15:49 (1879), type loc. Santa Tnez Mts., Cooper. 

 P. orcuttiana Gray, I.e. 19:88 (1883), type loc. mts. of L. Cal. near TJ. S. border, C. R. Orcutt. 

 P. leucantha Lemmon; Greene, Pitt. 1:175 (1888), type loc. Del Mar, San Diego Co., Lemmon. 



62. P. pachyphylla Gray. Stem compactly branched, forming a low dwarf 

 1 to 21/4 inches high; herbage viscid or glandular-pubescent throughout ; leaf -blades 

 roundish to ovate, thickish, rounded at apex or obtuse, cordate or subcordate at 

 base, crenate or entire, (1/4 or) % to 1% inches long, the petioles half as long or 

 longer; racemes 2 to 4, dense, short (i/4 to 1 or 2 inches long), borne in a small 

 compact panicle not exceeding the leaves or sometimes twice as long, or the panicle 

 sometimes reduced to a single raceme ; calyx-lobes glandular, narrowly oblong, 1 to 

 1^2 lines long; corolla pale purple or pink, narrowly campanulate, 2 to 21/0 liues 

 long; scales narrowly linear; stamens included; style cleft half way; capsule sub- 

 globose, slightl.y exceeding the calyx. 



Alkaline desert flats or gravelly desert mesas, 200 to 3000 feet : central and east- 

 ern Mohave Desert; Colorado Desert. South into Lower California, east to Arizona. 

 Apr.-May. 



Locs. — Mohave Desert: Baker (15 mi. n.), Mnnz 12,604; flats betw. Bristol Mts. and Marble 

 Mts., Jepson 20,366. Colorado Desert: Paloverde, Ball 5955; Salvation Spr., Chuckwalla Mts., 

 Hall 5867; Carrizo Mt., T. Brandegee ; Signal Mt., T. Brandegee. In the Mohave Desert occur 

 also loosely branching forms 2 to 5 inches high: Lucerne Valley (12 mi. e.), Muns 15,162; Kane 

 Springs wash, Ord Mt., Jepson 15,535 ; Hector, Hall 6121 ; Red Rock Canon, w. end El Paso Mts., 



