222 JUNCACEAE 



Leaf of inflorescence shorter than the 



flower cluster or wanting. 22. J. scirpoides. 



Capsule merely acute or with a short 

 mucro, not subulate. 

 Inner perianth parts much shorter 



than the outer. 23. J. br achy car pus. 



Inner perianth parts equalling the 

 outer or exceeding them. 

 Perianth parts about as long as 

 the capsule rarely a little 

 shorter. 

 Seeds 0.7 mm. long or more, 

 narrowed into tails at 

 both ends. 

 Perianth 3-4 mm. long. 24. /. canadensis. 

 Perianth about 2 mm. 

 long. 25. J. brachycephalus. 



Seeds 0.5 mm. long or less, 

 merely apiculate at 

 both ends. 

 Perianth parts as long 

 as or longer than the 

 capsule; heads several 

 to many-flowered. 26. /. acuminatus. 

 Perianth parts shorter 

 than the capsule; 

 heads 2-3-flowered. 27. J. debilis. 

 Perianth parts from J 2— J 3 shorter 

 than the capsules. 

 Stamens 6; cymes spreading. 28. J. articidatus. 

 Stamens 3; cymes contracted. 29. /. brevicaudatus. 



1. J. effusus L. In swamps and moist places: nearly throughout 



North America, except the extreme north and the high 

 western portions. Also in Europe and Asia. 

 Throughout the range. 



2. J. filiformis L. Lab. to Brit. Col., Pa., Mich, and in the 



Rocky Mountains to Utah and Col. Also in Europe and 

 Asia. 



Known only from Naomi Pines and Long Pond, Monroe Co., Pa. 

 Both places are on or very near the terminal moraine, have an 

 elevation of 1,200-1,933 ft- an d a growing season of 118 days. 



3. J. gymnocarpus Coville (/. Smithii Engelm.). In swamps: 



Mountains of Schuylkill and Lebanon counties, Pa., and in 

 Walton Co., Fla. 



The only known station in the range is at the summit of Broad 



