JUNCACEAE. 57 



Juncus ensifolius major Hook. Differs from the species in its larger size, 

 30-60 cm. high, and numerous smaller brown heads. Common in wet places. 



Juncus nodosus L. Stems 15-60 cm. high, terete, from slender creeping 

 tuberiferous rootstocks; leaves narrow; bract exceeding the inflorescence; 

 heads few to several, globose, 8-20-flowered ; perianth segments lanceolate, 

 acuminate, the inner longest; capsule subulate, exceeding the perianth. Wet 

 places, rare in our limits. 



Juncus suksdorfii Rydberg. Stems terete, leafy, 30-60 cm. tall, from 

 running rootstocks; leaves slightly flattened, with few partitions, 2-3 mm. 

 wide, 15-30 cm. long; ligules present; panicle loose, composed of numerous 

 small dark brown heads, these few-flowered; perianth segments lanceolate, 

 acuminate, 4 mm. long, smooth; stamens 6. Common along streams. It 

 very rarely produces good seeds. 



Juncus columbianus Coville. Stems terete, leafy, 30-45 cm. tall, slender; 

 leaves narrowly linear, becoming somewhat involute, with few cross partitions, 

 10-15 cm. long; heads cinnamon color, aggregated into a dense panicle; 

 perianth segments lanceolate, acuminate, equalling the three-angled acute 

 capsule; stamens 6. In springy places, rare. 



74. JUNCOIDES. WOOD RUSH. 



Perennial, with glabrous or sparingly pubescent herbage; 

 stems leaf-bearing; leaf sheaths with united margins; blades 

 grass-like; inflorescence umbellate, paniculate or congested into 

 head-like clusters; flowers always bracteolate; ovary 1 -celled 

 with 3 basal ovules. 



Flowers congested into 1-several head-like clusters. J. campestre. 



Flowers solitary or in clusters of 2 or 3 in an open panicle. 



Leaves 10-12 mm. broad; perianth brown, 3-3.5 mm. long. J. glabratum. 



Leaves 6-8 or 10 mm. broad; perianth pale green, 1.5-2.5 



mm. long. /. parviflorum. 



Juncoides campestre (L.) Kuntze. Stems tufted, 15-40 cm. tall, the 

 whole plant loosely yillous; leaves flat, 2-5 mm. broad, 5-15 cm. long; flowers 

 in short spikes, these in cymes; longest bract usually exceeding the inflorescence; 

 spikes oblong, 5-15 mm. long, on peduncles 1-5 cm. long, erect or nodding; 

 perianth segments straw-color or brownish, lanceolate, acuminate, 3 mm. long; 

 capsules obtuse, short-beaked, equalling the perianth. Dry woods, common. 



Juncoides glabratum (Hoppe) Sheldon. Glabrous throughout; stems 

 30-50 cm. high, from creeping rootstocks; leaves dark green, flat, 10-20 cm. 

 long, 10-12 mm. broad, acute; panicle loose and nodding; bracts small; perianth 

 segments dark brown, lance-ovate, acute, shorter than the apiculate nearly 

 black capsule. Mt. Carlton, Kreager. An alpine species greedily eaten by 

 horses. 



Juncoides parviflorum (Ehrh.) Coville. Very similar to J. glabratum but 

 taller and more slender; leaves usually with a few long hairs at base; panicle 

 very loose; perianth segments straw-color, lanceolate, acuminate, hardly 

 equalling the straw-colored capsule. In swamps in woods. 



