WATERLEAF FAMILY 489 



IV 

 Style parted to the middle or below. 



Plants glabrous or glabrate and glaucous below the inflorescence; all but the uppermost cauline leaves opposite. 



35. P. racemosa. 



Plants variously pubescent throughout, not glaucous; cauline leaves, or most of them, alternate. 



Plants prickly-hispid; leaves flaccid, shallowly lobed all around, the lobes crenate or dentate. 



16. P. Rattanh. 



Plants hirsute or hirsutulous and usually glandular; leaves firm, entire or with a few entire lobes at 

 the base. 

 Capsule terete; filaments papillate or glabrous. 



Leaves narrowly oblanceolate to ovate-lanceolate, 3-S mm. broad; corolla 3-4 mm. long, usually 



shorter than the calyx. 42. P. minutissima. 



Leaves ovate-lanceolate to ovate, 5-10 mm. broad; corolla 4-6 mm. long, longer than the calyx. 



44. P. vallicola. 



Capsule flattened; filaments hairy. 46. P. phacelioides. 



Style merely bifid at the apex, or cleft at most one-third. 



Perennial from a suffrutescent caudex, the older stems white-tomentose; capsules often persistent and becom- 

 ing hardened. 53. P. perity hides. 

 Annual from a slender taproot, the stems without tomentum; capsules permanently membranaceous. 

 Corolla deciduous; seeds oblong to ovoid, terete or angled. 



Leaves prominently venose; ovules few (4-8) to each placenta. 54. P. suaveolens. 



Leaves without prominent lateral veins; ovules numerous (10-100) to each placenta. 



Petioles slender, equaling or exceeding the leaf blades; flowers slender-pedicellate in lax cymes. 

 Corolla purple or violet, campanulate-funnelform, 7-14 mm. long, 4-8 mm. broad; style 



3.5-5 mm. long. 55. P. pnlchella. 



Corolla pale violet to white, about 5 mm. long, 2.5-3 mm. broad; style 1 .5-2 mm. long. 



56. P. rotundifolia. 



Petioles shorter than the leaf -blades; flowers short-pedicellate or subsessile in compact cymes. 

 Cymes pedunculate; seeds about 25, 1-1.5 mm. long. 58. P. Parishii. 



Cymes subsessile; seeds 50-100, 0.5 mm. long. 57. P. Lemmonii. 



Corolla marcescent; seeds orbicular, flattened. 59. P. saxicola. 



V 

 Filaments with a dilation or wing at base; style parted above the middle. 

 Corolla subrotate or pelviform, the tube about equaling the limb. 



Leaves coarsely dentate, serrate, or lobed; corolla violet with white or yellow markings at the center; 

 filament-dilations pubescent. 60. P. Parryi. 



Leaves crenate or crenate-dentate; corolla white (rarely blue); filament-dilations glabrous. 



61. P. longipes. 



Corolla tubular-campanulate or campanulate-funnelform, the tube about twice as long as the limb. 

 Corolla tubular-campanulate, constricted at the throat; chiefly coastal. 62. P. minor. 



Corolla campanulate-funnelform, not constricted; deserts. 63. P. campanularia. 



Filaments without a basal dilation or wing; style parted to below the middle. 



Inflorescence rather lax, at least some pedicels slender; corolla 8-18 mm. broad, the center darker-colored than 



the periphery, or the whole corolla white; filaments pubescent. 64. P. viscida. 



Inflorescence dense, the pedicels all short; corolla 30-50 mm. broad, the center colored like the periphery; 

 filaments glabrous. 65. P. grandiflora. 



VI 



Leaves broadly oval to orbicular, cordate, entire to crenulate-dentate; styles divided about to the middle; calyx- 

 lobes shorter than the capsule; seeds about 50 to more than 100. 

 Corolla 10-15 mm. long; calyx-lobes 3-4 mm. long; seeds about 50. 66. P. calthifolia. 



Corolla 5-7 mm. long; calyx-lobes 2-3 mm. long; seeds more than 100. 67. P. pachyphylla. 



Leaves linear-oblong to oval, cuneate or truncate, pinnately lobed to bipinnatifid; styles divided one-fourth or less; 

 calyx-lobes longer than the capsule; seeds 5 to about 20. 

 Corolla 2-4 . 5 mm. long, shorter than to about equaling the calyx. 

 Calyx-lobes linear to linear-oblanceolate. 

 Calyx-lobes spatulate. 

 Corolla 6-15 mm. long, at least twice the length of the calyx. 



Leaves deeply pinnately lobed to bipinnatifid; seeds about 12-20. 

 Leaves bipinnatifid; calyx-lobes linear to linear-oblanceolate. 

 Leaves pinnately lobed or pinnatifid; calyx-lobes spatulate. 



Corolla-limb white; seeds about 20, about 0.5 mm. long. 71. P. brachyloba. 



Corolla-limb blue; seeds about 12, 1-1.25 mm. long. 72. P. Fremontii. 



Leaves shallowly pinnately lobed; seeds 5-8. 73. P. gymnoclada. 



1. Phacelia hydrophylloides Torr. Waterleaf Phacelia, Fig. 4060. 



Phacelia hydrophylloides Torr. ex A. Gray, Proc. Amer. Acad. 7: 400. 1868. 



Perennial from a woody base, 1-3 dm. tall, softly appressed-hirsute throughout; stems simple 

 or branched, decumbent or ascending from the base. Basal leaves alternate, oblong-oval, 3-5 cm. 

 long, 1.5-3 cm. broad, tapering into a petiole of about equal length, coarsely toothed or lobed, or 

 pinnatifid at base with a pair of oblong lobes ; cauline leaves alternate, numerous, like the basal ; 

 flowers rather numerous, short-pedicellate in small globose cymes, 1-3 cm. long, the cymes 

 spreading in fruit; calyx-lobes linear-oblong, 3-4 mm. long, about 0.5 mm. broad, densely hirsute 

 on the margins, nonaccrescent ; corolla purplish blue to white, broadly campanulate, deciduous, 

 5-6 mm. long, ()-8 mm. broad, the lobes ovate, acute because of their laterally recurved margins, 

 2-2.5 mm. long, the whole slightly longer than the calyx; stamens long-exserted, about 8 mm. 

 long, the anthers oblong-oval, 1-1.5 mm. long; scales oblong to oval, adnate, united over the 

 base of the filament; style long-exserted, 8-10 mm. long, cleft to the middle or below; capsule 



