STANDLEY — FLOKA OF GLACIER PAEK. 305 



17. JUNCACEAE. Rush Family. 



Grasslike annual or perennial herbs, with, narrow leaves; flowers small, green or 

 brown; sepals and petals each 3, scalelike; stamens 6 or 3; fruit a 1 or 3-celled 

 capsule, containing 3 to many seeds. 



Plants glabrous; leaf sheaths open; seeds numerous 1. JTJNCUS. 



Plants hairy, at least on the edges of the leaves; leaf sheaths closed; seeds 3. 



2. JTJNCOIDES. 

 1. JUNCUS L. Rush. 



Leaves flat or terete; flowers in heads, cymes, or panicles, each flower with a bract 

 and sometimes 2 bractlets at the base; stamens 6 or 3; capsule 1 or 3-celled; seeds 

 often with tail-like appendages at the ends. 



Lowest bract of the inflorescence terete, appearing like a continuation of the stem, 

 the inflorescence apparently lateral. 

 Seeds with a tail-like appendage at each end; flowers 1 to 5. 

 Capsule acute; lowest bract usually twice as long as the inflorescence or longer; 



upper leaf sheaths usually with blades 1. J. parryi. 



Capsule obtuse or shallowly notched; bract only slightly, if at all, longer than the 

 inflorescence; leaf sheaths without blades, merely bristle-pointed. 



2. J. drummondii. 

 Seeds without tail -like appendages; flowers often more numerous. 



Sepals and petals green or straw-colored 3. J. filiformis. 



Sepals with a dark brown stripe on each side of the midrib 4. J. baltlcus. 



Lowest bract not appearing as a continuation of the stem or, if so, channeled on the 



upper side. 



Flowers not in heads, inserted singly on the branches of the inflorescence; leaves 



flat, with their faces turned to the stem. 



Plants annual, branched, usually 5 to 15 cm. high; inflorescence more than 



half the height of the plant; capsule rounded at the apex ... 5. J. bufonius. 



Plants perennial, simple, tufted, usually 25 to 50 cm. high; inflorescence very 



short, less than one-tenth the height of the plant; capsule notched at the 



apex 6. J. confusus. 



Flowers in dense heads; leaves various. 

 Leaves compressed, inserted with one edge toward the stem. 



Stamens 6; ligule of the sheath usually produced into small auricles. 



7. J. saximontanus. 



Stamens 3; ligule without auricles 8. J. ensifolius. 



Leaves terete, or flat, but with one face turned toward the stem. 

 Leaves flat, not hollow, inserted -with one face toward the stem, without cross 

 partitions. 



Seeds with tail-like appendages 9. J. regelii. 



Seeds not appendaged 10. J. longistylis. 



Leaves terete or channeled on the upper surface, hollow, provided inside with 

 cross partitions. 

 Leaves channeled along the upper side. 



Heads 2 to 5, about 6 mm. broad; sepals pale bro-wTi .... 11. J. alpinus. 

 Head 1, 8 to 12 mm. broad; sepals very dark brown. 



« 12. J. mertensianus. 



Leaves channeled along the upper side. 



Capsule 6 to 9 mm. long; stems usually leafy, about 1.5 mm. thick. 



13. J. castaneus. 

 Capsule 3 to 5 mm. long; stems naked or leafy only at the base, less than 

 1 mm. thick. 



