ENGELMANN—NORTH AM. SPECIES OF JTJNCUS. 471 
unilocularem sequantibus; filamentis anthera oblongo-lineari 
apiculata bis terve longioribiis; seminibus obovatis apiculato- 
acutatis areis lineolatis reticulatis. 
Swamps near Mendocino City, California, discovered in Oc¬ 
tober, 1865, by H. N. 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. 2,1,466, excl. syn.; Rostk, 
Mon. 38, t. 2, f. 2, excl. syn. Torr. FI. 1ST. Y. 2, 326, excl. var. 
2; Gray, Man. ed. 2, 482: eaulibus teretibus erectis e basi 
stolones tuberiferos emittentibus; paniculze plerumque sub- 
simplicis capitulis pluri vel multifloris; sepalis lanceolato- 
linearibus subulatis stamina 6 fere duplo superantibus capsulam 
pyramidato-rostratam unilocularem sequantibus seu plerumque 
ea brevioribus; seminibus ovatis abrupte apiculatis lineolato- 
reticulatis.— J. Rostkovii , Mey. June. 26; La Harpe, Mon. 
133 ; Kunth, 1. c. 332; J. polycephalus, Hook. FI. Bor. Am. 2, 
Yar. 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 sequalibus 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. 
Yar. /?. Texanus: caule elatiore (pedali bipedali) foliisque 
tenuibus; spatha patente paniculam plerumque compositam 
decompositamve fere aequante; 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. 
Yar. 7. megacephalus , Torr. 1. c.: caule elatiore (pedali 
tripedali) foliisque robustis; spatha erecta seu paulo deflexa 
•foliove summo paniculAm subsiraplicem coarctatam ssepius 
