468 ' HYDROPHYLLACEAE phacelia 



of thin texture, mostly entire and simple, elliptic, acute, some of the 

 radical with a pair of pinnae at the summit of the slender petiole : racemes 

 several, terminal and subterminal : corolla nearly cylindrical, either deep 

 purple or ochroleucous : mature calyx-segments narrowly oblanceolate, 

 or some of them more dilated at summit, hispid with spreading hairs, 

 without finer pubescence: capsule small, ovate, acuminate mostly 4-seeded. 

 In rich moist soil, southeastern Oregon and adjacent California. 



P. heterophylla Pursh Fl. 410. P. circinata. Jacq. ? Hispid and the 

 foliage canescent: stem stout, 6-24 inches high from a perennial root: 

 leaves from lanceolate to ovate, acute, pinnately and obliquely striate- 

 veined, the lower tapering into a petiole and commonly some of them 

 with 1 or 2 pairs of small lateral leaflets : inflorescence hispid ; the dense 

 spikes thyrsoid congested : corolla bluish, longer than the oblong-lanceo- 

 late or linear calyx-lobes : filaments much exserted, sparingly bearded. Dry 

 grounds and rocky ridges, Brit. Columbia to California. 



P. virgata Greene Erythea iv, 54. Hispid and the foliage strigose: 

 stem usually solitary, erect and strict, simple, 1-3 feet high from an 

 annual or biennial root : leaves pinnate or the upper ones simple and en- 

 tire, leaflets lanceolate, acute or acuminate, 6-12 lines long, strongly pin- 

 nate-veined: flowers in dense glomerules in a long yirgate spike or thyr- 

 sus ; inflorescence hispid ; sepals oblong-lanceolate, corolla white or yel- 

 lowish, little exceeding the calyx; filaments long exserted, often curved or 

 twisted, pubescent. Dry ground, southwestern Oregon. 



P. leucophylla Torr. Frem. Rep. 95. Perennial by a stout rootstock, 

 pale, densely silky-pubescent, the hairs appressed or ascending: stems sim- 

 ple' or branched, 12-18 inches high : leaves lanceolate to oblong, entire ; 

 pinnately^ veined, 2-4 inches long, 4-12 lines wide, the lower long-petioled, 

 the upper sessile or nearly so ; spike-like branches of the scorpioid cymes 

 very dense, nearly straight and 1-3 inches long when expanded: flowers 

 sessile, very numerous, about 4 lines high: calyx lobes hispid, oblong-lan- 

 ceolate or linear, somewhat shorter than the white or bluish, 5-lobed 

 • corolla', corolla-appendages conspicuous, in pairs between the filaments; 

 stamens exserted glabrous; ovules 2 on each placenta; capsule ovoid. In 

 dry soil, Idaho to Dakota and Nebraska. 



P. humilis T. & G. Pac. R. Rep ii, 122. Pubescent or the inflorescence 

 often hirsute: stem 8-10 inches high from an annual root, diffusely 

 branched from the base : leaves spatulate-oblong or oblanceolate, rather 

 obtuse; the lower rarely with 1 or 2 lateral ascending lobes, the veins 

 branching: spikes loosely paniculate or solitary, in age rather slender: 

 pedicels either all very short, or the lower sometimes almost as long as 

 the calyx: corolla indigo-blue, rather deeply lobed, surpassing the linear 

 calyx-lobes : filaments moderately exserted, glabrous or sparingly beard- 

 ed, above: capsule ovate, acute, 1% lines long, 4-seeded: seeds a line long, 

 minutely pitted. Eastern Oregon to Nevada and California. 



'*~ ■*" Leaves simple, all petioled rounded-cordate, somewhat pal- 



niately lobed or incised, the lobes serrate. 



P. malvaeflora Cham. Linn, iv, 494. Rather tall and stout, hispid with 

 spreading or reflexed bristles and the foliage more or less pubescent : leaves 

 green and membranaceous, round-cordat,e, incisely 5-9-lobed, acutely 

 toothed, somewhat palmately ribbed at base : flowering spikes solitary or 

 geminate, an inch long : corolla 3-4 lines long, white, longer than the un- 

 equal linear and spatulate calyx-lobes : stamens exserted : seeds alveolate- 

 scabrous. Along the coast, southern Oregon and California. 

 . P. Rattani Gray Syn, FI. Supp. 413. Hfepid with slender stinging 

 "bristles throughout : root annual : stem slender and weak,' 6-18 inches high : 

 - leaves oval to oblong-ovate, with truncate or barely subcordate base, in- 



