352 



JUNCACEAE 



40. J. rugulosus. 



Epidermis of the leaves and steins transversely rugosely roughened. 

 Stamens 3. 



Heads few, spherical, densely many-flowered. 

 Heads many, turbinate, few-flowered. 

 Capsule subulate; stamens 6. 



Leaf-blade abruptly divergent from its sheath; inner perianth-segments shorter than the outer 



43. /. torreyi. 

 Leaf-blade erect; inner perianth-segments longer than the outer. 44. /. iwdosus. 



41. /. bolanderi. 



42. J. acitminatus. 



VI. Ensifolii 



Anthers much shorter than the filaments. 



Perianth 4-5 mm. long; capsule acute below the mucronation. 

 Perianth 3-4 mm. long; capsule obtuse below the mucronation. 

 Anthers usually much shorter than the filaments, rarely equalling them. 

 Capsule tapering gradually into a slender beak. 

 Capsule abruptly contracted into a short beak. 

 Stamens 5. 



Heads commonly 25-100; perianth usually straw-colored; leaves 4-10 mm. wide. 



48. /. xij^hioides. 

 Heads commonly 2-12; perianth dark brown; leaves usually 2-4 mm. wide. 



49. /. saximontanus. 

 Stamens 3. 50. J. cnsifoliits. 



45. /. phaeocephalus. 



46. J. macrandrus. 



47. J. oxv»ieris. 



1. Juncus parryi Engelm. 

 Parry's Rush. Fig. 855. 



Juncus parryi Engelm. Trans. St. Louis Acad. 2: 446. 1866. 



Stems tufted, 10-30 cm. high, slender, from matted rootstocks. 

 Only the uppermost basal leaf-sheath bearing a blade ; blade 

 sulcate at base, terete above, 3-6 or- rarely 8 cm. long, scarcely 1 

 mm. thick ; inflorescence 1-3-flowered, the flowers inserted singly 

 and each with a pair of bractlets at the base ; lowest leaf of 

 inflorescence 1.5-6 cm. long; perianth 5-7 mm. long, tinged with 

 brown, its segments lanceolate, acuminate, the inner a little 

 shorter and acute, with broad scarious margins ; stamens 6, 

 scarcely half the length of the perianth ; anthers much longer 

 than the filaments ; capsule oblong, triangular, acute, slightly 

 exceeding the perianth ; seeds ovate, 2 mm. long, tailed, finely 

 striate. 



LTsually in dry grassy or stony slopes, Arctic to Canadian Zones; 

 British Columbia to Montana south to Colorado and southern California. 

 Type locality : Colorado. 



2. Juncus drummondi Meyer. 



Drtimmond's Rtish. Fig. 856. 



Juncus coDipressiis subtriflorus Meyer, Linnaea 3: 368. 1828. 

 Juncus drummondi Meyer; Ledeb. Fl. Ross. 4: 235. 1853. 

 Juncus subtriflorus Coville, Contr. Nat. Herb. 4: 20S. 1893. 



Stems tufted, mostly 20-45 cm. high, from matted 

 rootstocks. Basal leaf-sheaths all bladeless or with the 

 mere rudiments of blades ; inflorescence 1-3-flowered 

 rarely 4-5-flowered, the flowers inserted singly and 

 each with a pair of bractlets at the base ; lowest leaf 

 of the inflorescence mostly 2-3 cm. long; perianth 6 

 mm. long, its segments lanceolate, acute or acuminate, 

 with broad brown margins, the inner equalling the outer, 

 or nearly so ; stamens 6, scarcely half the length of 

 the segments ; anthers longer than the filaments ; cap- 

 sule oblong, refuse at apex, equalling the segments ; 

 seeds ovate, 2 mm. long, caudate, very finely striate. 



Moist alpine slopes, Arctic and Hudsonian Zones; Alaska 

 south to the southern Sierra Nevada, California and New 

 Mexico. Type locality: Rocky Mountains. 



