RUSH FAMILY 



365 



39. Juncus dubius Engelm. 

 ]\Iariposa Kusli. Fig. 893. 



Juncus dubius Engelm. Trans. St. Louis Acad. 2: 459. 1S6S. 



Stems stout. 5-12 dm. high, from stout creeping root- 

 stocks. Leaf-sheaths with distinct auricles, the blades 1-4 

 dm. long, 1.5-3 mm. broad, compressed, conspicuously 

 septate ; panicle compound, diffuse, 7-25 cm. long ; heads 

 numerous, 6-20-flowered ; perianth 3 mm. long, rather pale 

 brown, the segments about equal, lanceolate, acuminate ; 

 anthers much longer than the filaments ; capsule narrowly 

 oblong, tapering above into a long rostrate beak ; seeds 

 abruptly apiculate at each end, reticulate, the reticulations 

 transversely lineolate. 



Mountain meadows and stream banks, Arid Transition Zone; 

 Oregon through the Coast Ranges, the Cascade Mountains and 

 Sierra Nevada to San Diego County, California. Type locality : 

 Clark's Meadow, near the Mariposa Big Tree Grove. 



40. Juncus rugulosus Engelm. 

 Wrinkled Rush. Fig. 894. 



Juncus riigulosus Engelm. Bot. Gaz. 6: 2J4. 18S1. 



Stems short, 5-12 dm. high, from stout 

 creeping rootstocks, conspicuously rugose, as 

 also the sheaths and blades. Basal sheaths 

 bladeless, usually colored ; stem leaves 2-4, their 

 sheaths with a conspicuous auricle, the blades 

 terete, 15-45 cm. long, 3-4 mm. broad, dis- 

 tinctly septate ; panicle decompound and diffuse, 

 6-25 cm. long ; heads numerous, 5-10-flowered ; 

 perianth 3 mm. long, light greenish brown and 

 more or less tinged with purple, the segments 

 narrowly lanceolate, acuminate ; anthers about 

 equalling the filaments ; capsule narrowly ob- 

 long, tapering above into a beak ; seeds reticu- 

 late, the reticulations transversely lineolate. 



Stream banks and springs. Upper Sonoran Zone; 

 Kern and San Luis Obispo Counties, south to San 

 Diego County. Type locality : "running streamlet at 

 the base of the San Bernardino Mountains." 



41. Juncus bolanderi Engelm. 

 Bolander's Rush. Fig. 895. 



Fig. 



Juncus bolanderi Engelm. Trans. St. Louis Acad. 2: 470. 



1868. 

 Juncus bolanderi riparius Jepson, Fl. Calif. 1: 255. 1921. 



Stems from creeping rootstocks, slender, 5-8 

 dm. high. Basal sheaths bladeless ; stem leaves 3-4. 

 their sheaths with conspicuous auricles ; the blades 

 slightly coinpressed, 10-20 cm. long. 1-1.5 mm. 

 wide, distinctly septate ; heads 2 or 3 or sometimes 

 solitary, many-flowered, subglobose ; perianth 3.5 

 mm. long, greenish brown, the segments narrowly 

 lanceolate, setaceously acuminate ; stamens 3 ; anth- 

 ers much shorter than the filaments ; capsule 

 clavate-oblong, shorter than the segments, obtuse 

 and apiculate at the apex ; seeds minute, obovate. 

 reticulate. 



Stream banks and swamps. Humid Transition and 

 Upper Sonoran Zones: Umpqua Valley, Oregon, to Mendo- 

 cino County, California, also occurring locally in the lower 

 Sacramento Valley and Orange County. Type locality : 

 swamps near Mendocino City, California. 



