276 



JUNCACEAE (RUSH FAMILY) 



593. J. brachycarpns. 

 Inflorescence x 2 j. 

 Fruiting flower x 3. 



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 southw. July-Get. 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 ; 

 rreyl - seeds (0.3 mm. long) abruptly apiculate. 

 Moence x % _Damp light soil, Mass, to N. C. ; Ont. 

 Fruiting flower x 3. . ,,. j m T r> rno 



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. (J. scirpoides, var. echinatus 

 Engelm.) Va. (?) to Fla. 



35. J. acuminatus 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. d6bilis 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 din. 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 x25. 



