ENGELMANN—NORTH AM. SPECIES OF JUNCUS. 471 
unilocularem equantibus; 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. MN. 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, 83-5 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: Noposus, Lin. Sp. PI. ed. 2, 1, 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; panicule plerumque sub- 
simplicis capitulis pluri vel multifloris; sepalis lanceolato- 
linearibus subulatis stamina 6 fere duplo superantibus capsulam 
pyramidato-rostratam unilocularem zquantibus seu plerumque 
ea brevioribus; seminibus ovatis abrupte apiculatis lineolato- 
reticulatis —J. Rostkovii, Mey. Junc. 26; La Harpe, Mon. 
133; Kunth, |. 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 ; capitulig, minoribus pluri-(8-20)floris; floribus minori- 
bus fuscatis; sepalis lanceolatis eequalibus seu exterioribus 
paulo brevioribus; antheris oblongis seu oblongo linearibus 
plerumque apiculatis filamento brevioribus; ovario ovato 
stylo brevissimo coronato; capsula ovato-lanceolata rostrata 
plus minus exserta. 
Var. 3. Texanus: caule elatiore (pedali bipedali) foliisque 
tenuibus; spatha patente paniculam plerumque compositam 
decompositamve fere equante; capitulis majoribus multi-(15— 
40)floris; floribus majoribus demum stramineis; sepalis lan- 
ceolato-subulatis exterioribus brevioribus; antheris linearibus 
obtusis filamento (hinc duplo) longioribus; ovario lanceolato 
in stylum longiorem sensim abeunte; capsula pyramidato- 
lanceolata subulata exserta. 
Var. y. megacephalus, Torr. 1. ¢.: caule elatiore (pedali 
tripedali) foliisque robustis; spatha erecta seu paulo deflexa 
foliove summo paniculam subsimplicem coarctatam sspius 
