PHACELIA FAMILY 265 



minthoides Elmer, Bot. Gaz. 41:309 (1906), type loc. Hernandez, San Benito Co., Lathrop. Var. 

 OPACA J. T. Howell, Lflts. West. Bot. 1 :221 (1936), type loc. Merced (5 mi. ne.), J. T. Howell 4192. 



28. P. thermalis Gi-eene. Stems with few or many branches from the base, 

 3 to 12 inches high; herbage thinly puberulent and hirsutulous; leaf -blades ovate 

 in outline, 1 to 1% inches long, pinnately cleft or divided into 5 or 7 segments, the 

 lower pair usually distinct and disci-ete ; racemes dense, 1 to 3 inches long ; calyx- 

 lobes oblong-lanceolate, reticulate-venulose, thinly but markedly bristly-ciliate; 

 corolla white or pale blue, tubular, 1% lines long, exceeding the calyx only slightly ; 

 scales semi-obovate, quite distinct from scales of contiguous pairs, attenuate below 

 to an extremely slender point adnate to sides of filaments ; stamens included ; style 

 2-cleft, very short, included in the fruiting caljrs. 



Moist soil, 3500 to 5000 feet : Lassen, Shasta and Modoc Cos. North to eastern 

 Oregon. June. It is very similar in aspect and habit to Phacelia ciliata. 



Locs.— Bieber, nw. Lassen Co., J. T. Howell 12,222 ; Bald Mt., s. of Fall Eiver Mills, ne. Shasta 

 Co., Hall 4- Bahcoch 4269; Little Hot Springs Valley, sw. Modoc Co., M. S. BaTcer ; Horse Camp, 



6 mi. se. of Perez sta., w. Modoc Co., J. T. Hotvell 12,270. So far as the records show this species 

 has no habitat relation to hot springs. 



Refs. — Phacelia thermalis Greene, Erythea 3 :66 (1895), type loc. Little Hot Springs Val- 

 ley, Modoc Co., BaTcer 4" Nutting. P. ciliata var. thermalis Jepson, Man. 824 (1925). 



29. P. pedicellata Gray. Stem robust, erect, simple or branched, % to IV2 

 feet high; herbage short-villous and glandular, with a heavy odor; leaf -blades 

 broadly ovate or sub-orbicular in outline, 2V2 to 41/2 inches long, pinnate with 3 to 



7 distinct leaflets ; leaflets sub-orbicular to ovate, serrate or incisely lobed, % to 2^4 

 inches long, with petiolules (or the uppermost pair of leaflets with a broadish sessile 

 base) ; upper leaves sometimes not pinnate but round-ovate and merely deeply 

 toothed (sometimes a basal leaf also simple) ; flowers closely packed in short ra- 

 cemes, the racemes aggregated in compact terminal cymes; pedicels filiform, 1 to 3 

 lines long, densely pilose, often deflexed in fruit ; calyx-lobes linear or oblanceolate, 

 2 lines long, exceeding the globular capsule ; corolla white, lavender or pale lilac, 

 eampanulate, 2 to 2^/4 lines long; scales rather broad, free from the filaments, curv- 

 ing upward, each one approximating the scale of the adjacent filament so as to 

 form a sort of hood ; stamens and style exserted ; style cleft nearly half-way. 



Partly shaded cliffs and rocky walls of desert canons, 300 to 4500 feet, infre- 

 quent : Inyo Co. ; eastern Mohave Desert ; Colorado Desert. East to Arizona, south 

 to Lower California. Mar.-May. 



Field note. — A characteristic habitat is as follows : On the steep gradient of a talus slide on 

 the southerly canon wall of Johnson Canon, near Shadscale Spr. in the Panamint Range, scattered 

 individuals in a colony of Phacelia pedicellata were flowering on April 22, 1940. The stems, quite 

 erect and unbranched below the inflorescence, bear widely spreading long-petioled leaf -blades, the 

 whole blade rather compact and crumpled or undulate. As seen at a little distance the fleshy 

 petioles, spreading ividely from the stout central axis and bearing clumps of vivid green on the 

 end, recall in miniature the wide-spreading branches of conventional illustrations of Lebanon 

 Cedars. The entire herbage is extremely ill-smelling, the stems, petioles and roots very fleshy. 



The corolla scales are quite free from but originate near the base of the filaments and are 

 wholly adnate to the corolla-tube. Each scale curves away from the filament ; above it is abruptly 

 narrowed to a short lanceolate apex. The curved portion of the scale is quite broad and approxi- 

 mates the curved portion of the scale of the adjoining filament in such a way as to form a hood 

 or sort of chamber. The ovary is seated on a thin white disk (Jepson Field Book, 59:141. ms.). 



Locs. — Inyo Co. : Badwater, Death Valley, C. N. Smith 103 ; Johnson Cauon, Panamint Range, 

 Jepson 19,637; Shepherd Canon, Argus Mts., Jones. Mohave Desert: Lavic, Jepson 15,458; Am- 

 boy Crater, Jepson 20,308; Fountain Canon, Providence Mts., Mary Beal 550; Piute Creek, near 

 Piute Mts., N. C. Wilson. Colorado Desert: Devils Canon, 8 mi. w. of Coachella, Clary 1612; 

 Palm Creek, w. of Borrego Sprs., T. Brandegee ; Wagon Wash near Sentenac Canon, below San 

 Felipe Valley, e. San Diego Co., Jepson 12,482. 



Refs. — Phacelia pedicellata Gray, Syn. Fl. 2:160 (1878), type from L. Cal., Streets; 

 Jepson, Man. 824 (1925). 



30. P. crenulata Torr. Stem erect, branching, i/^ to 1 (sometimes 3) feet high; 

 herbage glandular throughout and ill-scented, hirsutulous to hirsute or hirsute- 



