JUNCACEAE (RUSH FAMILYj 



J. Gerardi. 



J. Vaseyi. 

 J. orcnen.siH. 



Sepals and petals all long--attenuate and exceeding the capsule ; 

 seeds ovoid, apioulate. 

 Flowers scattered singly along the one-sided usuallj' dichoto- 



mous branches . ' \. J. hufoniux. 



Flowers clustered {Vt J. bwfonius, v. con genius. 



Petals blunt or obtuse, shorter than or only slightl}^ exceed- 

 ing the capsule ; seeds truncate . . . . (l) J. bt//07iius, V. halophilus. 

 d. Perennials e. 



6. Flowers prophyllate, i.e. subtended bj' bracteoles (2) in addi- 

 tion to the "bractlet at base of pedicel /. 

 /. Leaf-sheaths with fimbriate auricles ; flowers l-i, 5-20 times 

 exceeded by the thread-like subtending leaf. 

 Basal sheaths with setiform scarcely^ leaf-like blades ; can- 

 line leaves mostly crowded at the summit ; flowers 



usually 2-4 . . . , 2. J. trifidufi. 



Basal sheaths bearing long leaves ; cauline leaves scattered ; 



flowers usually solitary (2) J. trijidus, x.moiianthoa, 



f. Leaf-sheaths with entire (or merely erose) auricles ; flowers 

 (except in depauperate individuals) numerous g. 

 g. Leaf-sheaths covering one half the stem or more ; the brown 



and greenish sepals obtnse, and incurved at tip 

 g. Leaf-sheaths covering one fourth the stem or less ; sepals 

 acute or acuminate h. 

 h. Seeds with long caudate appendages. 



Inflorescence exceeding the erect bracts ; capsule 4.5-G 



ram. long, usually exceeding the calyx . 

 Inflorescence exceeded bj' the bracts; capsule much 

 shorter than the calyx ... . . 



h. Seeds short-pointed or blunt i. 



i. Capsule reddish or castaneous, ellipsoid, much exceed- 

 ing the calyx IZ. J. Greenei. 



i. Capsule green or straw-colored (brown in age), shorter 

 than or about equaling the calyx j. 

 Q. Leaves flat (or in age becoming involute') k. 

 k. Auricles at the summit of the sheaths scarious, 

 whitish, conspicuously extended beyond the 

 point of insertion ; bracts exceeding the inflo- 

 rescence I. 

 I. Capsule at least two thirds as long as the spread- 

 ing-ascending sepals. 

 Flowers mostly clustered at the tips of the 



branches of the inflorescence 

 Flowers scattered and secund along the 

 branches. 

 Branches of inflorescence loosely ascending, 

 elongate, the ultimate floriferous branch- 

 lets elongate and ascending . . (4) 

 Ultimate floriferous branchlets widely spread- 

 ing, 0.5-2 cm. long . , . . {A) J. 

 I. Capsule less than one hali" as long as the closely 



appressed sepals 



Ic. Auricles at the summit of the sheaths not conspicu- 

 ously extended beyond the point of insertion. 

 Bracts" shorter than the cymes ; flowers 2 5—3.5 

 mm. long, scattered and secund along the as- 

 cending or incurved branches . . . 1. J. secundum. 

 Bracts (or at least the lowermost) exceeding the 

 cymes ; flowers mostly larger, not conspicu- 

 ously secund. 

 Inflorescence and basal sheaths straw-colored 

 or the latter somewhat darker. 

 Sheaths and auricles membranaceous, pale ; 



perianth erect X>. J. interior. 



Sheaths and auricles cartilaginous, darker ; 



perianth sj)reaiUng . . . . . 8. e/. Dudleyi. 

 Inflorescence brownish ; inner basal sheaths 



strongly purple-tinged . . (9) J. dichotomus, v. platyphyllus. 

 y. Leaves terete, or at most slightly grooved along the 



upper surface &. J", dichotomus. 



3. Flowers eprophyllate, i.e. with only the bractlet at the base of 



the very short pedicel m. 

 m. Capsules at most 4 mm. long, rarely exceeding the calyx; 

 flowers glomerulate. mostly in freely branched cymes. 

 Leaves terete, scape-like. 



Capsule broadly ovoid, about equaling the calyx ; seeds 



ovoid, obtuse . • . . . . . . . 19. J. Rocmerinnus. 



Capsule ellipsoid, slightly exceeding the calyx ; seeds with 



long caudate tips . . , 20. t/". maritimus. 



Leaves flat, grass-like. 



4. J. tenuis. 



J. tenuis, V anthelatus. 

 tenuis, v. William sii. 

 6. J. monostichus. 



