244 HYDROPHYLLACEAE 



Corolla oblong-campannlate, sliallowly cleft. 



Corolla a little ventricose, that is, slightly broader below than at throat ; ovules 15 to 20 



to each placenta; mainly coastal S. Cal 56. P. minor. 



Corolla funnelform-campanulatc, that is, much broader at throat than below; ovules 20 



to 30 to each placenta; transmontane deserts 57. P. campanularia. 



B. Seeds transversely corrugated; corolla without scales or the scales very narrow or indis- 

 tinct; ovules more than 2 to each placenta; annuals; transmontane deserts or mountain 

 ranges bordering them (except P. bracliyloba). — Subgenus Microgenetes. 



Leaves plnnately divided or pinnatifid into many or numerous lobes or divisions, the divisions 

 rather fine (M; to 4 lines long). 

 Corolla small, shorter than or only slightly exceeding calj"x. 



Calyx-lobes linear, slightly dilated and often recurved or spreading at apex ; stems dif- 

 fuse or ascending; transmontane deserts 58. P. ivesiana. 



Calyx-lobes strongly spatulate, straight; stems erect; San Gabriel Mts. and w. side of 



Colorado Desert 59. P. affinis. 



Corolla 2 to 3 times longer than calyx. 



Flowers 5 to 7 lines long ; corolla-throat not bearing areolae ; cismontane and transmon- 

 tane 60. P. fremontii. 



Flowers 3 to 4 lines long; corolla-throat with areolae; cismontane, Monterey Co. to San 



Diego Co 61. P. hrachyloia. 



Leaves round-ovate, entire or crenate, not pinnatifid ; stamens included ; transmontane deserts. 

 Leaves subcordate at base; style cleft % to % ; capsule globose, the fruiting calyx % to 

 as long. 



CoroUa 2 to 2V2 lines long, 1% to 1% times as long as the calyx; compact dwarfs 



62. P. pachypliylla. 

 Corolla 4 to 6 lines long, 2 to 3 times as long as the calyx ; erect robust branching plants. 



63. P. caUhifolia. 

 Leaves acute at base; style shortly cleft at apex; capsule oblong, V2 to % as long as the fruit- 

 ing calyx; decumbent or procumbent plants 64. P. gymnoclada. 



J — Subgenus EuPHACELiA. Corolla-tube with 10 scales, each attached by one side 

 to the corolla-tube and by the other side to the base of the stamen ; ovules 2 to 6 

 (or 8 to 200) to each placenta; seeds not transversely corrugated (or in a few 

 species slightly so on one side) . 



1. P. argentea Nels. & Mcbr. Stems 4 to 14 inches high, decumbent or ascend- 

 ing, forming mound-like clumps, sparingly leafy or sometimes markedly leafy at 

 base; leaf -blades elliptic to suborbicular, simple and entire (or rarely with a pair 

 of supplementary leaflets at base) , 1 to IV2 inches long, thick, densely silky-strigose, 

 the upper side with the hairs impressed right and left between the lateral parallel 

 ribs of the blade so as to make compact hirsute ridges with conspicuous furrows 

 along the ribs between the ridges; under side of blades with the lateral ribs in 

 relief and densely hirsute, the intervals pubescent or tomentulose; racemes in a 

 dense subcapitate cluster ; corolla white. 



Coast-line sand dunes, 5 to 50 feet : Del Norte Co. North to Curry Co., south- 

 western Oregon. July. 



Locs.— Crescent City, Davy; Pt. St. George, Cooper 129; Lake Earl, Tracy 16,371; Smith 

 River Indian Eoservation, R. Van Deventer 310. This sand dune plant is closely allied to various 

 forms of Phacelia magellanica. The describable differences are mainly restricted to the peculiar 

 distribution of the leaf hairs which results in marked furrows on the blades along the lateral ribs 

 on the upper side. 



Refs. — Phacelia argentea Nels. & Mcbr., Bot. Gaz. 61:34 (1916), type loc. Chetco, Ore., 

 Howell 209, only the leaves described. P. calif ornica var. rotundata Dundas, Bull. S. Cal. Acad. 

 33:156 (1935), type loc. Lake Earl, Del Norte Co., Davy. 



2. P. magellanica Cov. Stems erect or ascending, few from a heavy root- 

 erown, puberulent and spreading-hispid, V2 to 2 feet high ; leaf-blades pinnatifid 

 with distinct divisions, or the main blade ovate or oblong-ovate and entire with a 

 pair of supplementary divisions at base or wholly entire; racemes dense, race- 

 mosely disposed or capitately congested ; calyx-lobes linear or oblanceolate, hirsute 

 and puberulent; corolla campanulate, 2 to 3 lines long; stamens exserted. 



