April, 1913.] 
Liliales of Ohio. 
127 
8. Heads of the inflorescence 5-15, each head usually 5-10 flowered, 
plants less than 20 in. high. J. marginatus. 
8. Heads of the inflorescence usually 20-100, each head 2-5 flowered, 
plants over 20 in. high. J. aristulatus. 
9. Glomerules loosely few-flowered, hemispherical. 10. 
9. Glomerules densely many-flowered, spherical. 13. 
10. Stamens 6, or if 3 the glomerules only 3-7 flowered; capsule longer than 
the perianth segments. 11. 
10. Stamens 3, glomerule 5-many flowered, capsule shorter than the 
perianth segments. J. acuminatus. 
11. Stamens 6, seeds not with caudate tips. 12. 
11. Stamens 3, seeds with caudate tips. J. brachycephalus. 
12. Plants articulate, sepals acuminate, flowers brownish, capsule grad¬ 
ually tapering to a mucronate tip. J. articulatus. 
12. Plants not articulate, sepals blunt, often mucronate-tipped, flowers 
straw-colored, capsule acute, or obtuse with a short tip. 
J. richardsonianus. 
13. Involucral leaf usually much exceeding the inflorescence stamens 6. 14. 
13. Involucral leaf usually shorter than the inflorescence, or if exceeding 
the inflorescence then not over one inch long, stamens 3. 15. 
14. Sepals exceeding the petals, leaf-blades abruptly divergent from the 
stem. J. torreyi. 
14. Sepals shorter than the petals, leaf-blade erect. J. nodosus. 
15. Capsule obtuse or acute at the apex, sometimes mucronate but not 
prolonged into a beak; seeds with definite caudate tips. 
J. canadensis. 
15. Capsule tapering evenly into a prominent subulate beak; seeds blunt or 
merely pointed, not caudate. J. scirpoides. 
1. Juncus effusus L. Common Rush. An herb with a 
branching root-stock, lateral inflorescence and non-septate leaves. 
Basal leaves reduced, scapes soft and pliant; inflorescence a 
diffused, much-branched cyme; flowers small and greenish; 
stamens 3; style short; capsule trilocular; seeds small. Marshy 
ground. General and common. 
2. Juncus balticus Willd. Baltic Rush. Scape rigid; in¬ 
florescence a lateral, loose or dense cyme; perianth parts brown 
with a green mid-rib and hyalin margins; capsule about as long 
as the perianth, brown mucronate, trilocular. On sand}' soil. 
Erie County. 
3. Juncus dudleyi Weig. Dudley’s Rush. Inflorescence 
a terminal cyme subtended by bractlets; leaves non-septate; 
leaf-sheath covering Y of the stem; auricles dark, cartilaginous 
not conspicuously extended beyond the point of insertion; seeds 
blunt. Montgomery', Clinton, Champaign, Licking, Delaware, 
Tuscarawas. 
4. Juncus tenuis Willd. Slender Rush. Inflorescence ter¬ 
minal, subtended by bracts; flowers subtended by bractlets; 
sheaths covering Y\ of the stem; leaves flat, non-septate, becoming 
involute in age; auricles scarious, conspicuously extended beyond 
the point of insertion. Seeds blunt. General. 
