268 



JUNCACEAE (RUSH FAMILY) 



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



seeds ovoid, apiculate. 

 Flowers scattered singly along the one-sided usually dichoto- 



mous branches % . . 1. /". bufonius. 



Flowers clustered (1) J. bufonius, v. congestus. 



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

 ing the capsule ; seeds truncate . . . . (!)/ bufonius, v. halophilus. 

 Perennials e. 



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

 tion to the bractlet at base of pedicel /. 

 /. Leaf-sheaths with fiinbriate auricles ; flowers 1-4, 5-20 times 



exceeded by the thread-like subtending leaf. 

 Basal sheaths with setiforrn scarcely leaf-like blades ; cau- 

 line leaves mostly crowded at the summit ; flowers 



usually 2-4 . . 2. J. trifidus. 



Basal sheaths bearing long leaves ; cauline leaves scattered ; 



flowers usually solitary (2) J. trifidus, v. monanthos. 



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 obtuse, and incurved at tip . 3. J. Gerardi. 



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 4.5-6 

 im. long, usually exceeding the calyx . 



Inflorescence exceeded by the bracts ; capsule much 



11. J". Vaseyi. 



12. J. oronensis. 



shorter than the calyx 

 h. Seeds short-pointed or blunt *. 



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



ing the calyx ........ 13. J. Greenei. 



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



than or about equaling the calyx j. 

 j. 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 . . 4. J. tennis. 



Flowers scattered and secund along the 



branches. 



Branches of inflorescence loosely ascending, 

 elongate, the ultimate floriferous branch- 



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

 Ultimate floriferous branchlets widely spread- 



ing, 0.5-2 cm. long . . . . (4; J. tennis, v. Williamsii. 



I. Capsule less than one half as long as the closely 



appressed sepals ...... 6. J. monostichus. 



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 . . 7. J. secundus. 



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 ...... 5. J. interior. 



Sheaths and auricles cartilaginous, darker ; 



perianth spreading ..... 8. J. Dudleyi. 



Inflorescence brownish; inner basal sheaths 



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

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



upper surface ....... 9. J. diehotomus. 



9. 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 



Capsule ellipsoid, slightly exceeding the calyx ; seeds with 

 long caudate tips ........ 



Leaves flat, grass-like. 



19. J. Roemerianus. 



20. J". maritimu*. 



