ENGELMANN — NORTH AM. SPECIES OF JUNCUS. 439 



His specimens were collected in April in full bloom ; the 

 stem is nearly four feet high, the panicle six inches long ; 

 the flowers, absolutely identical with European specimens, 

 are easily recognized by their broadly margined sepals, the 

 inner ones being deeply emarginate, and by their thick and 

 short subulate stigmas. I have also seen specimens said to 

 have come from the coast of New Jersey ; Baldwin collected 

 it on the La Plata in South America, and Chamisso and 

 Gaudichaud brought it from the same regions. J. macrocar- 

 pus, Nees, from the Cape of Good Hope is the same species. 



2. J. Rcemerianus, Scheele, Linnrea, 22, 348 ; Walp. Ann. 

 3, 655 : rhizomate longe repente; foliis caules (2-3 pedales) 

 robustos rigidos teretes aaquantibus; spatha paniculam supra- 

 decompositam patulo-eflusam longe superante ; glomerulis 

 3-5-floris; sepalis ovato-lanceolatis 5-nerviis exterioribus 

 acutatis, interioribus brevioribus obtusis saepe mucronatis ; 

 antheris six late linearibus filamento ter quaterve longioribus 

 demum deciduis ; stylo ovario ovato multo breviore ; capsula 

 ovata obtusa mucronulata sepala exteriora tequante placentis 

 tumidis triloculari ; seminibus late obovatis obtusis vix apicu- 

 latis tenuissime (sub lente) costato lineolatis (J. maritimus, 

 auct. Amer.). 



Atlantic coast of the United States from New Jersey to 

 Florida and Texas. — Closely allied to the European J. mari- 

 timus, for which it has always been taken, until Scheele, 

 without discovering its distinctive characters, gave it a new 

 name. It is well marked by an open spreading panicle with 

 slender, flexible branches, deciduous anthers ; a very short 

 style, which is not half as long as the obtuse ovary ; an obtuse, 

 short, deep brown capsule; remarkably large, spongy pla- 

 centae, which fill the greater space of the capsular cavity, and 

 the like of which I have not seen in any other species; and 

 obtuse, tailless seeds, marked with very slight, wavy ribs and 

 slighter cross lines. — J. maritimus bears a rigid, fastigiate 

 panicle, persistent anthers, an ovary attenuated into a style 

 of nearly its own length, a greenish, acute capsule which 

 usually exceeds the sepals, placentae of ordinary size, and 

 seeds with distinct tails and stronger ribs. 



The light, brownish flowers are 1.5 lines, and the seeds 0.3 

 line, long, and nearly 0.2 line thick. 



This is the only Juticus in which occasionally unisexual 

 specimens occur (Georgia, Le Conte, in Hb. Acad. Philad., 

 and Florida, Chapman, in Hb. A. Gray) ; these plants, pistil- 

 late by abortion of the stamens, have a stricter but fewer 

 flowered panicle, and thus present a very unusual aspect ; our 

 southern botanists ought to find out under which conditions 

 this form occurs, and whether any corresponding staminate 

 plants grow with them. 



