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 head.s, 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. /. 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. /. 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 villous; 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 glabrattui (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. 



Jimcoides parviflorum (Ehrh.) Coville. Very similar to /. 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. 



