438 POLEMONIACEAE 



ovoid. Leaves simple or occasionally pinnately 3-lobed, rarely 5-lobed, glabrate to minutely 

 puberulent; bracts 3-5-lobed or simple and entire, the middle lobe lanceolate, the lateral lobes 

 much shorter, divergent or ascending, puberulent to lightly floccose ; heads 1-3-flowered, solitary 

 or 2-3 aggregated into small clusters, terminal and in the upper leaf-axils, arachnoid and lightly 

 floccose ; calyx deeply cleft into subequal lobes, 5 mm. long, sinuses over half-filled with a hyaline 

 membrane which flanks the lobes to their tips, densely arachnoid ; corolla funnelform, 6-8 mm. 

 long, white to pale blue, tube 3-5 mm. long, throat 1 mm., lobes 2-3 mm. ; stamens inserted on 

 base of throat, exserted, filaments 1-1.5 mm. long, slightly unequal, anthers sagittate, 1 mm. 

 long; stigma barely exserted, 0.33 mm. long; capsule ellipsoid-obovoid, 3-5 mm. long, valves 

 campanulately spreading on dehiscence. 



Dry hillsides, Upper Sonoran and Arid Transition Zones; Oregon east of the Cascades from Deschutes and 

 Harney Counties southward through western and central Nevada, and in California along the eastern base of the 

 Sierra Nevada to the Tehachapi Mountains, and then on the western slopes of the southern Sierra Nevada to 

 Fresno County. Type locality: Kings River Canyon, California. June-July. 



11. Eriastrum Tracy i H. L. Mason. Tracy's Eriastrum. Fig. 3970. 



Eriastrum Tracyi H. L. Mason, Madrotio 8: 87. 1945. 



Erect slender annuals 1-2 dm. high ; stems simple or racemosely branched, lightly arachnoid- 

 flocculent throughout. Lower leaves simple, upper 3-cleft above base, segments linear-filiform; 

 flowers congested in terminal heads, often several heads aggregated at ends of branches, densely 

 but loosely arachnoid-lanate ; bracts 3-5-cleft from a broad base, often with a short membrane in 

 the sinuses, arachnoid-lanate below, becoming glabrate above ; calyx deeply cleft into unequal or 

 subequal segments 6-8 mm. long, densely arachnoid-floccose-lanate, sinuses about half-filled with 

 a hyaline membrane ; corolla 8-9 mm. long, subsalverform, light blue to white, tube 5 mm. long, 

 throat 1 mm. long, lobes 2-3 mm. long; stamens inserted at base of throat, about 0.75 mm. long, 

 filaments 0.5 mm. long, anthers 0.5 mm. long, oval, versatile; pistil about one-half the corolla-tube 

 in length ; capsule 5 mm. long, 2-2.5 mm. wide, oblong-ellipsoid ; seeds 1 or 2 to a locule. 



Trinity County, California. Type locality: Hayfork Valley, Trinity County, California. June. 



12. Eriastrum Brandegeae H. L. Mason. Brandegee's Eriastrum. Fig. 3971. 



Eriastrum Brandegeae H. L. Mason, Madrofio 8: 88. 1945. 



Erect annual 5-30 cm. high, branching virgately, corymbose-paniculate. Leaves 3-parted into 

 linear-filiform divisions from above the base, lightly flocculent ; flowers sessile in densely arach- 

 noid-floccose obovoid heads ; bracts 3-5-lobed, exceeding the heads ; heads 1 to 3 at ends of 

 branches ; calyx deeply cleft into unequal linear-acerose divisions, 7-10 trim, long, densely arach- 

 noid, sinuses over half-filled with a narrow plaited membrane ; corolla subsalverform, about 

 10 mm. long, white to pale blue, tube 4-5 mm. long, throat 2 mm. long, lobes 3 mm. long, tube 

 and throat together shorter than calyx ; stamens inserted at base of throat, 1-2 mm. long, un- 

 equal to subequal, filaments 2 times anthers, anthers cordate-sagittate, 0.5 mm. long; pistil 4-5 

 mm. long, included, capsule 3-sided, elliptic in outline, 4 mm. long by 2 mm. wide, shorter than 

 the calyx ; locules only rarely 2-ovuled ; seed mucilaginous when wetted, solitary in locules. 



Mountains of Lake County, California. Type locality: ridge southeast of Borax Lake, Lake County, Cali- 

 fornia. June-Aug. 



13. Eriastrum Hooveri (Jepson) H. L. Mason. Hoover's Eriastrum. Fig. 3972. 



Huegelia Hooveri Jepson, FI. Calif. 3: 167. 1943. 

 Eriastrum Hooveri H. L. Mason, Madrono 8: 89. 1945. 



Erect annual, 10-20 cm. high, branching virgately, paniculate. Leaves linear, filiform, or 

 3-cleft with two long linear segments from near base, lobes tipped with a very slender point ; outer 

 bracts 3-5-lobed, the central lobe 3-4 times the flowers ; calyx unequally cleft, nearly filled with 

 a broad membrane, tips of lobes connivent over growing capsule ; corolla 6 mm. long, subequal 

 to the calyx, yellow to pale blue or white, tube 2-3 mm. long, throat 1-2 mm., lobes 2 mm., linear 

 spatulate ; stamens inserted on base of throat, equal or exceeding throat, slightly unequal to equal 

 in length, anther versatile, ellipsoid ; stigma included ; capsule oblong-ellipsoid, triangular, base 

 of style persistent ; locules 3-4-seeded. 



Rolling plains bordering the southern San Joaquin Valley, California. Type locality: Shafter, Kern County, 

 California. May-July. 



14. Eriastrum Abramsii (Elmer) H. L. Mason. Abrams' Eriastrum. Fig. 3973. 



Navarretia Abramsii Elmer, Bot. Gaz. 41: 314. 1906. 



Huegelia Abramsii J eipson and Bailey in Jepson, Fl. Calif. 3: 167. 1943. 



Eriastrum Abramsii H. L. Mason, Madrono 8: 90. 1945. 



Erect or spreading annual, 3-10 cm. tall, simple to few-branched; branching corymbose. 

 Leaves pinnately dissected into linear filiform green segments, sparsely arachnoid below, glabrate 

 above, 15-25 mm. long; flowers sessile in densely bracteate heads, closely packed with a white 

 felty arachnoid pubescence which envelopes the upner branches : calvx denselv cleft into linear, 

 acicular, subequal lobes, tip and base of lobes glabrous, midpoint densely arachnoid, floccose, 

 sinuses over half-filled with a broad hyaline membrane ; corolla 6-8 mm. long, regular to slightly 

 irregular, subequal calyx, narrowly funnelform, tube and throat yellow, lobes blue, lanceolate, 

 rotately spreading ; stamens equally inserted on throat, anthers versatile, ellipsoid to subsagittate. 



