268 



JUNCACEAE (RCSH FAMILY^ 



3. J. Gerardi. 



11. J. Vaseyi. 



12. J. oroneruia. 



13. J. Greenei. 



Sepals and petals all long-attennate and exceeding the capsnle ; 

 seeds ovoid, apicuiate. 

 Flowers scattered singly along the one-sided usually dichoto- 



mous branches I.J. hufonius. 



Flowers clustered (!)«/• lufoniuis, v. congestus. 



Petals blunt or obtuse, shorter than or only slightly exceed- 

 ing the capsule; seeds truncate . . . . (!)«/• hufonius, v. halophilus 

 d. Perennials e. 



e. Flowers prophyllate, i.e. subtended by bracteoles (2) in addi- 

 tion to the "braotlet at base of pedicel /. 

 /. Leaf-sheaths with tiuibriate auricles ; flowers 1-1, 5-20 times 

 exceeded by the ihread-hke subtending leaf. 

 Basal sheaths with setiforiu si-arcely leaf-like blades ; cau- 

 line leaves mostly crowded at the summit ; flowers 



usually 2-4 1. J. trifldua. 



Basal sheaths bearing long leaves ; cauline leaves scattered ; 



flowers usually solitary (2) J. trijidua, v. moiianthoa 



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

 (ex^cept in de[)auperate individuals) numerous g. 

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



and greenish sepals obtuse, and incurved at tip . 

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

 acute or acuminate /*. 

 h. Seeds with long caudate ajipendages. 



Inflorescence exceeding the erect bracts; capsule 4.5-6 



mm. long, usual!}- exceeding the calyx . 

 Inflorescence exceeded by the bracts; capsule much 



shorter than the cal\x 



h. Seeds short-pointed or blunt i. 



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

 ing the calyx 



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

 than or about equaling the calyx j. 

 j. Leaves flat (or in age becomino 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 . . . 4. J", tenuis. 



Flowers scattered and secund along the 

 branches. 

 Branches of inflorescence loosely ascending, 

 elongate, the ultimate floriferous branch- 

 lets elongate and ascending . . (4) J. tenuis, v. anthelatus 

 Ultimate floriferous branculets widely spread- 

 ing, 0.5-2 cm. long . . . . (4; «/". 

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



appressed .sepals 



k. 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 

 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 ; 



I'erianth erect b. J. interior. 



Sheaths and auricles cartilaginous, darker; 



perianth sjireading %. J. Dudleyi. 



Inflorescence brownish ; inner basal sheaths 



strongly purple-tinged . . (9) J. dichotomua, v. platyphyllua. 

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



upper surface 9. c/l dichoiomua. 



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

 the very short pedicel tw. 

 tn. 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", Roeynerianua. 



Capsule elUpsoid, slightly exceeding the calyx ; seeds with 



long caudate tips 20. ./. mdritimut. 



Leaves flat, grass-like. 



tenuis, v. William sii 

 6. J. monostichua. 



7. J. secundua. 



