GENUS i. 



RUSH FAMILY. 



479 



37. Juncus caesariensis Coville. New Jersey 

 Rush. Fig. 1202. 



J. caesariensis Coville, Mem. Torr. Club 5- IQ 6. 1894. 

 Juncus asper Engelm. Trans. St. Louis Acad. 2: 478. 1868. 

 Not Sauze, 1864. 



Stems 2o'~4o' high, stout, erect, i.}" in thickness, 

 slightly roughened ; basal leaves few, the uppermost, 

 like the cauline, with inconspicuously articulate sheaths 

 and long erect terete roughened blades ; inflorescence 

 i '-4' high, with spreading branches, its lowest bract 

 with a small blade sometimes ii' long; heads 2-5-flow- 

 ered ; perianth 2"-2i" long, the parts lanceolate-acumi- 

 nate, stiff, green, striate, the inner longer than the 

 outer; stamens 6, about half as long as the perianth; 

 filaments about equalling the anthers ; style and stigmas 

 long; capsule lanceolate-oblong, 3-sided, mucronate- 

 acuminate, incompletely 3-celled ; seed tailed at both 

 ends, altogether about i" long, the body about I" long, 

 closely striate, almost devoid of transverse lines. 



Sandy swamps of southern New Jersey. 



38. Juncus brachycarpus Engelm. Short-fruited 

 Rush. Fig. 1203. 



Juncus brachycarpMs Engelm. Trans. St. Louis Acad. 2 : 467. 

 1868. 



Rootstocks bearing 1-6 stems; stems erect, 8'~36' high, 

 terete, i-4-leaved ; blades terete, i" thick or less, seldom 

 exceeding 6' in length, the upper much shorter; inflores- 

 cence sometimes 4' high and with 20 spherical heads, or 

 smaller and even reduced to a single head; perianth ii"-2" 

 long, its parts subulate, the inner about three-fourths as 

 long as the outer; stamens 3, about half as long as the 

 perianth; capsule one-half to two-thirds as long as the 

 perianth, oblong, acute, mucronate, i-celled, dehiscent 

 through the tip ; seed oblong, acute at both ends, about i" 

 long, reticulate in about 18 longitudinal rows, the areolae 

 smooth and nearly square. 



Southern Ontario, through the Mississippi Valley to Okla- 

 homa, Texas and Mississippi ; also from Massachusetts to 

 Georgia. 



39. Juncus polycephalus Michx. Many-headed Rush. Fig. 1204. 



Juncus polycephalus Michx. Fl. Bor. Am. i : 192. 1803. 

 Juncus Engelmanni Buch. Krit. Verz. June. 67. 1880. 



Stem stout, about 3 high, compressed, 2-4- 

 leaved. Leaves 20' in length or less, the upper 

 shorter; blades vertically flattened, ii"-4" broad, 

 the septa incomplete, or the blades rarely nar- 

 rower, merely compressed, and with complete 

 septa; inflorescence 3i'-i2' high, its leaves with 

 nearly obsolete blades ; heads globose, 3$"-5" in 

 diameter; perianth ii"-2" long, its parts subulate; 

 stamens 3, one-half to three-fourths as long as 

 the perianth ; anthers shorter than the filaments ; 

 capsule subulate, I -celled, exceeding the perianth, 

 the valves remaining united by the slender beak, 

 their margins finally involute ; seed narrowly ob- 

 long, about i" long, acute at each end, with 

 nearly straight tips, reticulate in about 12 rows, 

 the areolae smooth. 



In swamps, Virginia to Missouri, Florida and 

 Texas. 



Juncus validus Coville, which has beak-less cap- 

 sules and leaves with complete septa, is recorded from Missouri ; Arkansas, Oklahoma, Mississippi 

 and Texas. 



