JUNCACEAE. 91 



Juncus oreganus Wats. Stems slender, spreading, 15-20 cm. high; panicle 

 loose; flowers in small heads; perianth segments chestnut-brown, with green 

 midrib, the outer acute, the inner rather obtuse and a little longer; stamens 6; 

 capsule brown, acute and mucronate, exceeding the perianth. 



In bogs along the coast, rare. Ilwaco, Piper, Henderson; Seattle, Frye; 

 International Boundary, Lyall; Sproat Lake, Vancouver Island, Macoun. 



Juncus nevadensis Wats. Loosely tufted; stems slender, 10-40 cm. high, 

 much exceeding the leaves; lowest leaves reduced to sheaths, the others with 

 terete septate blades; cauline leaves 1 or 2; inflorescence umbellate, the hemi- 

 spherical heads 3-10-flowered; perianth segments pale brown, equal, lanceolate, 

 acute or mucronate, the inner hyaline-margined, 4 mm. long; stamens 6; 

 capsule 3-angled, mucronate, shorter than the perianth. 



Vancouver Island to California. 



Jiincus alpinus affinis (R. Br.) Aschers. & Graebn. (/. richardsonianus 

 Schult.) Stems erect, 15-40 cm. high, bearing 1 or 2 leaves; leaves terete, 

 with conspicuous internal cross partitions; panicle sparse, the straight branches 

 bearing scattered heads of 3-12 flowers; perianth segments pale green the outer 

 longer than the obtuse inner ones; capsule acute, longer than the perianth. 



Shores of lakes and streams, Vancouver Island, Macoun; Whatcom County, 

 Washington, Gardner, Suksdorf. 



106. 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 i-several spike-like or head-like clus- 

 ters. 

 Inflorescence nodding, nearly always of a single spike-like 



cluster. J. spicatum. 



Inflorescence erect, of 2-12 globose or oblong clusters. 

 Spikes loosely flowered, solitary or few, in a narrow pan- 

 icle. /. siihsessile. 

 Spikes densely flowered, several to many, umbellate. /. campestre. 

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

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



long. J. glahratum. 



Leaves 6-8 or 10 mm. broad; perianth 1.5-2.5 mm. long. 



Panicle rays divaricate; leaves without pilose hairs. J. divaricatiim. 



Paricle rays drooping; leaves with a few pilose hairs 

 at base. 

 Flowers and capsules pale green; leaves thin, shin- 

 ing; seeds brown, ellipsoid. /. parviflorum. 

 Flowers and capsules dark brown; leaves thick, 



dull; seeds yellow, constricted at each end. /. majus. 



Juncoides spicatum (L.) Kuntze. Tufted; stems 10-40 cm. high; leaves 

 narrow, folded, sparsely villous; perianth segments acuminate, brown with 

 hyaline margins; capsule acute, shorter than the perianth. 



In the mountains at high elevations. 



Juncoides subsessile (Wats.) Piper n. comb. {Ltizula comosa siibsessilis 

 Wats.) Loosely tufted; stems suberect, 10-30 cm. high; leaves 3-4 mm. 



