This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
P. integrifolia Torr. Ann. Lye. N. Y. 2: 222. pl. 3. 1827.
Annual or biennial; stem erect or ascending, rather stout, very leafy, commonly branched above, viscid-hirsute, 6'-2° high. Leaves finely strigose-pubescent, ovate-oblong or oblong-lanceolate, irregularly crenate-dentate, obtuse at the apex, rounded or cordate at the base, 1'-2 1/2' long, petioled or the uppermost sessile; spike-like branches of the scorpioid cymes dense, 2'-4' long when expanded; flowers sessile, about 4" long; calyx-segments oblong, acute; corolla tubular-campanulate, white or blue, its tube longer than the calyx; filaments glabrous, exserted; ovules 2 on each placenta; capsule ovoid, obtuse.
In saline soil, western Kansas (according to B. B. Smyth); Oklahoma to Colorado, Mexico, Utah and Arizona. April-Sept.
Phacelia bipinnatifida Michx. Fl. Bor. Am. 1: 134. pl. 16. 1803.
Biennial, hirsute-pubescent; stem erect, usually much branched, glandular-viscid above, 1°-2° high. Leaves slender-petioled, 2-5' long, pinnately divided or deeply pinnatifid into 3-7 ovate or oblong acute or acutish, dentate or incised segments, or these again pinnatifid; flowers blue or violet, 6"-8" broad, numerous, slender-pedicelled in loose racemes, the inflorescence only slightly scorpioid; pedicels 4"-10" long, recurved in fruit; calyx-segments linear; appendages of the rotate-campanulate corolla in pairs between the stamens, conspicuous, villous on the margins, corolla-lobes entire; filaments pilose, exserted; ovules 2 on each placenta; capsule globose.
In moist thickets and along streams, Ohio to Illinois, Missouri, Georgia, Alabama and Tennessee. Ascends to 4000 ft. in North Carolina. April-June.
Eutoca Franklinii R. Br. App. Frank. Journ. 51 . pl. 27.
1823. Phacelia Franklinii A. Gray, Man. Ed. 2, 329. 1856.
Annual, villous-pubescent; stem erect, 6-18' high, simple, or corymbosely branched at the summit. Leaves 1 1/2'-3' long, pinnately parted into 7-15 linear or linear-oblong acute entire dentate or incised segments; flowers blue or nearly white, short-pedicelled in dense scorpioid racemes; calyx-segments linear-lanceolate, acute; longer than the tube of the rotate-campanulate corolla; appendages of the corolla free at the apex; anthers scarcely exserted; filaments glabrous, or nearly so; styles united nearly to the summit; ovules numerous on each placenta; capsule ovoid, acute.
Western Ontario, Michigan and Minnesota to British Columbia, Wyoming and Idaho. Summer.