278 



JUNCACEAE (RUSH FAMILY) 



about the length of the sheathing scarious awl-pointed bract ; flowers pale and 

 reddish (3-4 mm. long) ; sepals lanceolate, acute; petals obtusish, f the length 

 of the trigonous-ovoid acute or acuminate pale capsule (5-6 mm. long), as long 

 as the slender stamens ; filaments many times longer than the oblong anthers ; 

 recurved stigmas shorter than the style ; seeds oblong, with a very loose coat 

 prolonged at both ends (2-2.5 mm. long). Eurasia. 



Var. americanus Buchenau. Often taller (1-4.5 dm. high) ; heads 1 or 2; 

 flowers larger (4.5-5.5 mm. long); the distinctly mucronate-tipped capsule 

 longer (6-9 mm. long) ; seeds 3-4 mm. long. Peat-bogs, Lab. 

 and Nfd. to Ont., s. to N. S., Me., N. Y., Mich., and Minn., very 

 local. July, Aug. (E. Prussia.) 



42. J. rdpens Michx. Stems ascending (0.5-2 dm. high) 

 from a fibrous annual root, at length creeping or floating ; 

 leaves short, linear, those of the stem nearly opposite and 

 fascicled; heads few in a loose leafy cyme, 3-12-flowered; 

 flowers green (0.5-1 cm. long) ; sepals and petals rigid, lance- 

 subulate, sepals as long as the linear triangular obtuse capsule, 

 the petals much longer ; stamens as long as the sepals ; fila- 

 J repens. nients much longer than the oblong anthers; seeds obovoid, 

 Inflorescence x v 'slightly pointed, very delicately ribbed and cross-lined. Miry 

 banks and ditches, Del. to Fla. and La. June-Oct. FIG. 600. 

 43. J. marginatus Rostk. Stem erect, from a bulbous and stoloniferous 

 base (2-7 dm. high) ; leaves linear ; heads 3-12-flowered, in simple or compound 

 cymes ; flowers purplish and green (3.5 mm. long) ; sepals and 

 petals oblong, the sepals acute and slightly awned, petals longer, 

 mostly obtuse, as long as the subglobose scarcely mucronate cap- 

 sule ; stamens shorter than the sepals, early shriveling ; anthers 

 shorter than the filaments; style very short ; seeds (about 0.5 

 mm. long) slender, pointed at both ends and strongly ribbed. 

 Moist sandy places, Me. to Ont., Neb., and 

 southw. July-Sept. FIG. 601. 



Var. set&sus Coville. Similar to the species, 

 but with lance-attenuate aristate petals. 

 Kan. to La. and Tex. 



44. J. aristulatus Michx. Coarser (0.4-1 m. 

 Fruiting flower x 8. hi S h ) ' the larger inflorescence (0.5-2 dm. high) 



with abundant 2-5-flowered brown heads ; stamens equaling or 

 exceeding the sepals, persistent and usually exserted in fruit. (J. marginatus, var. 

 biflorus Engelm.) Wet sandy barrens, Mass, to Mich., and southw., mostly near 

 the coast. FIG. 602. 



2. LtZULA DC. WOOD RUSH 



Capsule 1-celled, 3-seeded, 1 seed to each parietal placenta. Perennials, 

 often hairy, usually in dry ground, with flat and soft usually hairy leaves, and 

 spiked, crowded, or umbeled flowers. (From Gramen Luzulae, or Luxulae, 

 diminutive of lux, light, a name given to one of the species from its shining 

 with dew.) JUNCOIDES [Dill.] Adans. JUNCODES Ktze. 



a. Flowers solitary at the tips of the ultimate branches of the inflorescence. 



Inflorescence an umbel, the filiform peduncles l(rarely 2)-flowered ; flow- 

 ers 8-4.5 mm. long 1. L. salttti 'Unix. 



I n ilorescence a loose decompound cyme; flowers 2 mm. long . . . 2. L. parvitforn. 

 a. Flowers crowded in spikes or glomeriiles b. 



b. Flowers white 8. L. nemoroaa. 



b. Flowers brown or straw-colored (rarely green in shade) c. 



c. Flowers in dense nodding spiko-likt- panicle 5. L. spicata. 



O. Flowers in mostly |N.lmiclcd ^lomerules d. 



d. Leaves flat, with blunt callous tips ; bracts at base of the flowers entire 

 or merely lacerate. 



Flowers flMtaneoni (6) L. campestris, v.frigida. 



Flow.-rs frmiirinoiis, pale brown or yellowish. 



Kay* all strongly ascending 6. L. campextrix. \. mult (flora. 



Ka\ - lor Minn' i.f tin-in) strongly divergent . . (0) /. i-<nnj>t'Ktrix, \. Inilbosa. 

 d. Leaves'with involute subulate tips; bracts at base of flowers ciliate- 



flmbriate 4. L. confuna. 



602. J. aristulatus. 



601. J. marginatus. 

 Inflorescence x %. 

 Fruiting flower x8. 



