276 



JUNCACEAE (RUSH FAMILY) 



592. J. Torreyi. 

 Inflorescence x %. 

 Fruiting flower x 3. 



5. J. brachycarpus. 

 Inflorescence x %. 

 Fruiting flower x ;j. 



31. J. Torrdyi Coville. Similar to the last ; stem stouter (0.4-1 m. high), 

 with thick leaves ; heads few and large (1-1.5 cm. in diameter), 30-80-flowered ; 

 anthers linear, shorter than the filaments. (J. nodosus, 

 var. megacephalus Torr.) Low sandy soil, Mass, to Sask., 

 westw. and south w. July-Oct. FIG. 592. 



32. J. brachycarpus Engelm. Stem erect (4-9 dm. 

 high), from a thick white horizontal rootstock, bearing 

 about 2 leaves and 2-10 densely flowered spherical heads 

 (7-11 mm. in diameter) in a slightly 

 spreading crowded cyme much exceed- 

 ing the involucral leaf ; flowers pale green 

 (4 mm. long) ; anthers much shorter 

 than the filaments ; style very short ; 

 seeds (0.3 mm. long) abruptly apiculate. 

 Damp light soil, Mass, to N. C. ; Ont. 

 to Miss, and Tex. June-Aug. FIG. 593. 



33. J. scirpoides Lam. Stem erect (2.5-9 dm. high), 

 rather slender, from a thick horizontal rootstock, bearing 

 about 2 terete leaves with wide and open sheaths, and a cyme 

 of few or many densely flowered pale green irregularly spheri- 



cal heads, much longer than the involucral leaf, its branches 

 erect and often elongated ; heads (6-13 mm. in diameter) 

 15-40-flowered ; flowers 3-4 mm. long; sepals and petals rigid, 

 awl-shaped and (especially the sepals) bristly-pointed, at 

 length pungent, as long as the stamens and nearly equaling 

 the oblong-triangular taper-pointed 1 -celled capsule ; anthers 

 very small ; style elongated or very short ; seeds ovoid, 

 abruptly pointed at each end (0.5 mm. long.) Wet sandy soil, N. Y. to Fla., 

 Mo., and Tex. July-Sept. 



34. J. megacephalus M. A. Curtis. Stouter ; leaves terete ; branches of the 

 compact cyme short ; heads larger, spherical, 40-80-flowered ; flowers 4 mm. 



long; sepals and petals narrower and more sharply pointed, 

 the sepals a little longer than the petals ; stamens shorter 

 and anthers longer than in the preceding, and seeds rather 

 smaller and more slender. (<7. scirpoides, var. echinatus 

 Engelm.) Va. (?) to Fla. 



35. J. acumlnatus Michx. Stems tufted, erect, slender 

 (3-7 dm. high), bearing about 2 leaves and a very loose 

 spreading cyme ; heads rather few and large (0.5-1 cm. 

 broad), 5-many-flowered, greenish, at length straw-colored 

 or darker ; sepals and petals lance-awl- 

 shaped, sharp-pointed, equal, as long as 



the ovoid-prismatic short-pointed 1-celled 

 straw-colored or light brown capsule ; an- 

 thers a little shorter than the filaments; 

 style almost none; seeds small (0.3-0.4 

 mm. long), acute at both ends, ribbed and 

 reticulated. N. E. to Ga., Minn., and 

 Tex. May-Aug. Heads often prolifer- 

 ous in autumn. (Mex.) FIG. 594. 



36. J. dSbilis Gray. Stems slender 

 (2-8 dm. long), flaccid, erect, decumbent, 



or even rooting at the nodes ; heads green, 2-7-flowered, in a 

 loose cyme (0.5-2.5 dm. long) ; flowers small (2.5 mm. long); 595. j. debilis. 

 capsule oblong-prismatic, short-mucronate. (J. acuminatus, var. inflorescence x %. 

 Engelm.) Wet sandy soil, R. I. to Mo., and southw. May- Fruiting flower x 3. 

 Aug. FIG. 595. 



37. J. diffusissimus Buckley. Slender and erect (2. 5-6 dm. high) ; heads very 

 numerous, 2-7-flowered, in a very diffuse and loosely dichotomous cyme (1-2.5 

 dm. long), the branches suberect ; flowers greenish or pale brown, 3 mm. long, the 



594. J. acuminatus. 

 Inflorescence x %. 

 Fruiting flower x 3. 

 Seed x 25. 



