JFNCACEAE (RUSH FAMILY) 



271 



J, tenuis. 

 Inflorescence x 2, 



5T0. J. interior. 

 Inflorescence x %. 



the ovoid retuse scarcely pointed green falsely 1-celled cap- 

 sule ; anthers much shorter than the filaments ; style very 

 short; seeds small (3-4 mm. long), delicately ribbed and 

 cross-lined. — Fields and roadsides, very 

 common. June-Sept. (Eu., n. Afr.) 

 Fig. 569. 



Var. anthelatus Wiegand. Tall (4-9 

 dm. high) and loose ; cyme loose, 6-18 

 cm. long ; flowers usually 2.5-3.5 mm. 

 long. — Me. to Mo. and Tex. 



Var. Williamsii Fernald. Compara- 

 tively low (2.5-5 dm. high) and slender ; 

 inflorescence 3-8 cm. long ; capsule about 

 equaling the calyx. — Gulf of St. Law- 

 rence to Ct. and N. Y. (Eu.) 



6. J. interior Wiegand. Compara- 

 tively stout, 4.5-9 dm. high ; leaves about 

 Sheath with auricles one third as long as the scapes ; mflores- 

 x2. cence 3-10 dm. long, with very ascend- 



ing branches, the flowers 3-4 mm. long ; 

 capsule obscurely 3-celled ; anthers much shorter than the 

 filaments; seeds 3.5-5 mm. long. — Prairies, 111. to Wyo. 

 and Tex. Apr.-July. Fig. 570. 



6. J. mon6stichus Bartlett. Erect, 3-5 dm. tall ; culms compressed ; leaves 

 basal, J-| as long as the culms, the blades involute in drying, the auricles as in 

 J. tenuis; inflorescence 4-8 cm. long, much exceeded by the 

 lowest bract, finally stramineous, the branches 1-2.5 cm. long, 

 often incurved, bearing 3-9 secund flowers ; perianth 4-5 mm. 

 long, the sepals lance-acuminate, entirely concealing the trig- 

 onous-ovoid falsely 1-celled capsule (2 mm. long) ; seeds 

 ovoid, coarsely reticulate, with longitudinally oblong areoles. 

 — Ind. and Ark. Fig. 571. 



7. J. seciindus Beau v. Strict (1-8 dm. 

 high); the short flat leaves mostly tufted, 

 rarely more than one third as long as the 

 scapes ; sheaths with rounded membranous 

 auricles; inflorescence 3-14 cm. long, the 

 branches closely flowered ; sepals erect, barely 

 exceeding the distinctly 3-celled capsule ; 

 anthers exceeding the filaments. {J. tennis, 

 var. secundus Engelm.) — Sandy or sterile 

 sofl. Me. to Vt. and N. C. ; also in the Miss. 

 Val. from Tenn. to 111. and Mo. June-Oct. 

 Fig. 572. 



8. J. Dudldyi Wiegand. Stiff (0.3-1 m. 

 high) ; leaves about half as long as the inflorescence x %. 

 scapes; inflorescence 1.5-7 cm. long, the 



flowers rather closely aggregated, 4-5 mm. long, the segments spreading- 

 ascending, yellowish-green, barely exceeding the imperfectly 1-celled trigonous 

 capsule ; filaments slightly exceeding the anthers; seeds 3.5-4.5 — 



mm. long. — Damp or open (mostly calcareous) soil, Que. to 

 Sask. and the Rocky Mts., s. to Pa., Mich., Wise, Minn., and 

 Kan. June-Sept. Fig. 573. 



9. J. dich6tomus Ell. Stems rigid (0.4-1 m. high) from a 

 tumid base ; leaves filiform, two thirds as long as the scapes, 

 the broad brown or purplish sheaths with rounded cartilagi- 

 nous auricles ; cyme loose or dense (2-8 cm. long), often with 

 1-sided forked branches, mostly longer than the involucral 

 leaf ; flowers greenish brown (3.5-4 mm. long) ; sepals lance- 

 olate, sharp-pointed, spreading in fruit, as long as the ovoid 



571. J. monostichus 

 Inflorescence x %. 

 Fruiting flower x 3 



572. J. secundus. 



573. J. DudleyL 

 Sheath wth auri- 

 cles X 2. 



