ENGELMANN—NORTH AM. SPECIES OF JUNCUS. 455 
distinguished from all our other ies by the le, or, _— 
ry, red-brown color (already nétiond y La La Harpe) 0 ‘ 
three a which usually exceed the oute adel “a 
length; it is further characterized by the acute outer se 
being dh shorter than the obtuse or, sometimes, mucronate 
inner ones; by the ovate, obtuse ovary, with the almost 
sessile, enclosed stigmas of the same length; and the sub- 
globose, obtuse, mucronulate capsule. The seeds are quite 
but in Lindheimer’s Fl. Tex. exsice. 193, which has been 
named -/. posse el they are eae short, ovate obtuse and 
anerey apiculate. The length of the seeds varies from 0.22 
to 0.33 line, and their thickness from } to } of their length. 
—J. aristulatus, Michx. 1, 191, and J. aristatus, Pers. Syn. 1, 
385, are exactly the same; a biflorus, Ell. Sketch, 1, 407,* 
and J. heteranthos, Nutt. Pl. Arkans. in Trans. il 
Soc. V. 153, are forms of the same with fewer flowers in the 
head. J. cylindricus, Curtis, Sillim. Journ. 44, 83; Steud. 
Glum. 2, 304, is a form with heads elongated into spikes 6 
lines long and 3 lines in diameter, sterile below, only the 
ee, flowers bearing fruit; outer sepals almost as long 
as inner 
We phe o> ~ following forms 
Var. a. vulgaris, 14-3 feet high, with 5-8flowered heads 
0 
heads in a a decompound, often very large, panicle; a southern 
— bie os om Com Texas, 
capitatus, 1-1} feet high, with few (2-6 or 8) 
lager + idioma heads; Long Branch, New Jersey, C. 
W. Short, and elsewher 
32. J. petocarpus, E. Mey. Synops. Luzul. p. 30; La 
Harpe Monog. 124; Kunth En. 3, 333, non Auct. Amer.: 
rhizomate horizontali tenui pallido; ¢ caulibus (spithameis pe- 
dalibus et ultra) 7 He raeke teretiusculis erectis paucifoliis ; 
foliis teretiusculis indist aa decompo- 
et ovarium acuminatum in — m breviorem abiens vix 
* Pica inner sepals, however, are not the shortest, as the usually so 
1 and reliable Elliott, age eg wl . cai of the pen, says, but, as 
in in all nts forms of this species, the longe 
