ENGELMANN — NORTH AM. SPECIES OF JUNCUS. 471 



unilocularem sequantibus; filamentis anthera oblongo-lineari 

 apiculata bis terve longioribus ; seminibus obovatis apiculato- 

 acutatis areis lineolatis reticulatis. 



Swamps near Mendocino City, California, discovered in Oc- 

 tober, 1865, by H. JV. Bolander, and named for him, one of 

 the acutest and most zealous explorers of Californian Botany. 

 Rhizoma not seen ; flattened stems very slender, terete leaves 

 strongly knotted ; mature heads 4-5 lines in diameter, brown, 

 shining, single, or 2, or, usually, 3-5 together, either sessile 

 and crowded together into a large cluster, or, some of them, 

 peduncled; flowers 2 lines long, with very narrow and sharp 

 pointed sepals, and very slender stamens; shape of capsule 

 quite peculiar ; seeds 0.25 line long, with about 8 ribs visible. 

 The flattened stems and the brown heads assimilate this spe- 

 cies to the Californian Ensifolii, but the rounded and strongly 

 knotted leaves and the sessile flowers seem to separate it from 

 them and place it with J. scirpoides and its allies. 



43. J. nodosus, Lin. Sp. PL, ed. 2, l,466,excl. syn.; Rostk. 

 Mon. 38, t. 2, f. 2, excl. syn. Torr. Fl. N. Y. 2, 325, excl. var. 

 2 ; Gray, Man. ed. 2, 482 : caulibus teretibus erectis e basi 

 stolones tuberiferos emittentibus ; paniculee plerumque sub- 

 simplicis capitulis pluri vel multifloris; sepalis laneeolato- 

 linearibus subulatis stamina 6 fere duplo superantibus capsulam 

 pyramidato-rostratam unilocularem requantibus seu plerumque 

 ea brevioribus; seminibus ovatis abrupte apiculatis lineolato- 

 reticulatis.— J. Rosikovii, Mey. June. 26; La Harpe, Mon. 

 133; Kunth, 1. c. 332 ; J. polycephalus, Hook. Fl. Bor. Am. 2, 

 190. 



Var. a. genuinus, caule humiliore (spithameo ultrapedali, 

 rarissime elatiori) foliisque tenuibus ; spatha erecta paniculam 

 subsimplicem coarctatam (raro capitulum singulum) super- 

 ante ; capitulis minoribus pluri-(8-20)floris; floribus minori- 

 bus fuscatis ; sepalis lanceolatis requalibus seu exterioribus 

 paulo brevioribus ; antheris oblongis seu oblongo linearibus 

 plerumque apiculatis filamento brevioribus ; ovario ovato 

 stylo brevissimo coronato; capsnla ovato-lanceolata rostrata 

 plus minus exserta. 



Var. p. Texanus: caule elatiore (pedali bipedali) foliisque 

 tenuibus ; spatha patente paniculam plerumque compositam 

 decompositamve fere aequante ; capitulis majoribus multi-(15- 

 40)floris; floribus majoribus deraum stramineis ; sepalis lan- 

 ceolato-subulatis exterioribus brevioribus ; antheris linearibus 

 obtusis fllamento (hinc duplo) longioribus ; ovario lanceolato 

 in stylum longiorem sensim abeunte; capsula pyramidato- 

 lanceolata subulata exserta. 



Var. y. megacephalus, Torr. I.e.: caule elatiore (pedali 

 tripedali) foliisque robustis ; spatha erecta seu paulo deflexa 

 foliove summo paniculam subsimplicem coarctatam sa^pius 



