JUNCACEAE (rush FAMILY) 



277 



t>9C}. J. ditfusissimus. 

 Part of inflorescence x %. 



597. J.robustus. 

 Part of inflorescence 



Seed X 80. 



linear-subulate sepals and petals subequal ; capsule linear- 

 prismatic. — Ind. to Ga. and Tex. June, July. Fig. 596. 



38. J. roblistus (Engelm.) Coville. Stem stout, tall 

 (0.5-1.2 m.), bearing 2 or 3 long 

 erect distinctly septate leaves, numer- 

 ous 5-8-flowered light brown heads 

 in a large much branched cyme (1-3 

 dm. long) ; ovoid-pristnatic capsules 

 scarcely longer than the sepals ; seeds 

 fusiform-ovoid. (</■. acuminaUis, var. 

 Engelm. ) — Deep swamps, 111. to La. 

 and Tex. June, July. Fig. 597. 



39. J. alpinus Vill. Stem erect 

 or slightly decumbent (0.5-3.5 dm. 

 high), from a creeping rootstock, with 

 1 or 2 slender erect leaves ; cyme 

 meager (1-15 cm. long), with erect 



branches bearing distant dark-brown heads, each of 3-10 



flowers (2-2.5 mm. long) and usually with one or more 



flowers elevated on slender pedicels ; sepals oblong, obtuse, 

 mucronate or cuspidate and usually longer than the rounded 

 oblong petals, as long as or shorter than the obtuse short- 

 pointed incompletely 3-celled castaneous capsule ; anthers a.s 

 long as the filaments ; style short ; seeds (0.5 mm. in length) 

 spindle-shaped. — Wet shores and marshes, Arctic Am., s. to 

 Nfd., N. B., n. Me., n. Vt., Oneida Co., N. Y. {Haberer), 

 and L. Superior. July, Aug. (Eurasia.) Fig. 598. 



Var. insignis Fries. Similar, usually taller (sometimes 

 6 dm. high) ; the flowers greenish or straw-color ; the capsule 

 pale brown. (J. Michardsonianus Schultes.) — Sandy shores, 

 etc., e. Que. to B. C, s. to 

 centr. Me., Pa., O., Ind., 

 111., etc. (Eurasia.) 



Var. fuscfiscens Fer- 

 nald. Branches spreading- 

 ascending; glomerulescom- 

 pactly and regularly flow- 

 ered, only ■ exceptionally 

 with any of the greenish or 

 straw-coloredflowers raised 



on elongate pedicels. — Vt. to B. C. and Mo. 



40. J. articuiatus L. Stems (1.5-6 dm. 

 high) , tufted from a short creeping rootstock, 

 with 1-3 slender leaves; cyme short (2-9 cm. 

 long), spreading, the crowded heads 3-10- 

 flowered ; flowers brown (2.5-3 mm. long) ; 

 petals a little longer than the sepals, shorter 

 than the slender-conic incompletely 3-celled 

 deep chestnut-brown shining capsule; anthers 

 as long as the filaments ; ovary attenuate into 

 a short style ; seeds (0.5 mm. long) obovoid,: 

 attenuate below, abruptly pointed above. — 

 Wet grounds, Nfd. to N. J., Ont., and Mich. 



Var. obtusatus Engelm. Inflorescence pale, usually larger (sometimes 1. 

 dm. long), tlie green flowers smaller, the abruptly mucronate pale capsule 

 shorter and duller. — Me. to N. J. and Vt., oftenest in brackish soil. 



* * * Leaves flat and grass-like or filiform, not septate. 



41. J. stygius L. Stems (1-3 dm. high) from slender branching rootstocks, 

 l-3-leaved below, naked above, the leaves fliiform ; heads 1-4, of 1-4 flbwers, 



598. J. alpinus. 

 Inflorescence x %. 

 Fruiting flower x 3. 



rf . articulatus. 

 Inflorescence x %. Fruiting tlower xS. 



July, Aug. (Eurasia.) Fig. 599. 



