252 FLORA. 



thick or less, usually less than I dm. long, the septa perfect; basal leaves similar, 

 but with longer blades; inflorescence strict or slightly spreading, sometimes 1.5 dm. 

 in length; heads 2-30, globose, 6 12 mm. in diameter; perianth 2.5-3.5 mm. long, 

 its parts subulate, the inner somewhat shorter; capsule subulate, i-celled, its long 

 beak exceeding the perianth; seed oblong, abruptly apiculate at either end, reticu- 

 late in 14-20 longitudinal rows. Me. (according to Fernald), N. Y. to Fla. and La. 



35. Juncus megacephalus M. A. Curtis. Carolina Rush. (I. F. f. 953.) 

 Stems 3-9 dm. high, tufted from a branching rootstock, stout, 2-3-leaved. Leaves 

 with auricled sheaths, the blades of the basal 2 dm. long or less; the uppermost 

 rarely 2 cm. in length; inflorescence 1.5 cm. high or less, its lowest leaf almost 

 bladeless, the others scarious; panicle of 1-40 heads; heads spherical, 8-12 mm. 

 in diameter; perianth 3-3.5 mm. long, its parts subulate, the outer longer than 

 the inner; stamens 3; capsule subulate, beaked, equalling the perianth, 3-sided, 

 i-celled; seed oblong, acute at either end, reticulate in 12-14 rows. Va. (?), N. Car. 

 to Fla. 



36. Juncus brachycephalus (Engelm.) Buch. Small-headed Rush. 

 (I. F. f. 954.) Stems 3-6 dm. high, tufted, 2-4-leaved; leaves all with well 

 developed blades, the lower commonly 1-2 dm. long; inflorescence commonly 6-15 

 cm. high, with spreading branches; heads top-shaped, 2-5 -flowered; perianth 

 2-2.5 mm - l° n g> * ts P ar ts lanceolate, the outer shorter than the inner; stamens 3; 

 capsule reddish brown, about one-half longer than the perianth, ovoid-oblong, 

 tipped, 3-sided, i-celled; seed with narrowly oblong body, short-tailed at either 

 end, 20-30-ribbed. Me. to Penn., 111. and Wis. 



37. Juncus Canadensis J. Gay. Canada Rush. (I. F. f. 955.) Stems 

 0.3-1.2 m. high, erect, stout, 2-4-leaved, few in a tuft. Basal leaves usually 

 decayed at flowering-time; stem leaves with large loose auriculate sheaths, and a 

 stout erect blade usually 1-2.5 dm. long; panicle 0.7-2.5 dm. in height; heads 

 usually crowded, 5-40-flowered; perianth 3-4 mm. long, the parts narrowly 

 lanceolate, acute, the inner longer than the outer; stamens 3; capsule lanceolate, 

 acute, mucronate, 3-sided, i-celled, reddish brown, exceeding the perianth; seed 

 1-2 mm. long, tailed at either end, the body with a smooth shining coat, about 

 40-striate. N. B. to Minn., Ga. and La. 



Juncus Canadensis subcaud&tus Engelm. Stems 4-7.5 dm. high, slender, frequently 

 weak and reclining; heads few, scattered; seed with very short tails. R. I. to Penn. 

 and Ga. 



Juncus Canadensis brevicaud&tus Engelm. Stems erect, 2-7.5 dm. tall, slender, 

 closely tufted ; panicle contracted ; heads 2-6-flowered ; seed long-tailed N. S. to Minn, 

 and N. J. 



38. Juncus acuminatus Michx. Sharp-fruited Rush. (I. F. f. 956.) 

 Plant 2.5-9 dm. high; rootstock short. Stems few or several in a tuft, erect, 

 1-3-leaved; blades of the lower leaves 1-2 dm. long; inflorescence 0.5-1.5 dm. 

 high, and with 5-50 heads, rarely larger, or reduced even to a single head, its 

 branches usually spreading; heads 3-20-flowered; perianth 2.5-3.5 mm< l° n g> i ts 

 parts lanceolate-subulate, nearly equal; stamens 3; capsule ovate-lanceolate, 

 broadly acute, mucronate, I -celled, equalling the perianth, light brown; seed 

 oblong, about 0.5 mm. in length, tipped at either end, reticulate in 16-20 longitudinal 

 rows. Me. to S. Ont., Minn., Ga. and Mex. Also on the northwest coast. Heads 

 often proliferous. 



Juncus acuminitus d^bilis (A. Gray) Engelm. Smaller, densely tufted, 2.5-5 dm. 

 high, the stems often weak and procumbent; perianth shorter, 2-2.5 mm. long; capsule 

 linear-oblong, obtuse, about one-third longer than the perianth, short-tipped. N. J. to 

 S. Car. 



39. Juncus robustus (Engelm.) Coville. Stout Rush. (I. F. f. 957.) Plant 

 about 9 dm. high. Stems single or few in a tuft, stout, nearly terete, 1-2-leavcd; 

 blades erect, terete, conspicuously many-septate, 2-6 dm. long, usually reaching 

 or exceeding the inflorescence; inflorescence 1-2.5 dm. high, with innumerable 

 (commonly 300-500) heads; heads 2-10-flowered; perianth 2-2.5 mm - l° n g- * ts 

 parts nearly equal, lanceolate-subulate; stamens 3; capsule equalling or one-third 

 exceeding the perianth, straw-colored, oblong, obtuse with a short tip, 3-sided 



