268 



JUNCACKAE (RUSH FAMILY) 



8. J. Ger^rdi. 



n. J. Vaseyi. 

 12. J. oroiienais. 



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

 seeds ovoid, apiculate. 

 Flowers scattered singly along the one-sided usually dichoto- 



mous branches . t. J. bufomus. 



Flowers clustered (!)</. Hm/oniua, v. congesius. 



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

 ing the capsule ; seeds truncate . . . . (i) J. In^oniue, v. halophilus. 

 d* Perennials &. 



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

 tion to the bractlet at base of pedicel /. 

 y. Leaf-sheaths with fimbriate auricles ; flowers 1-4, 5-20 times 

 exceeded by the thread-like subtending leaf. 

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

 line leaves mostly crowded at the summit; flowers 



usually 2-4 2. J. trijid-us. 



Basal sheaths bearing long leaves ; cauline leaves scattered ; 



flowers usually solitary (2) t/. triJvduB, v. monanthoa. 



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 

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

 acute or acuminate ?i. 

 h. Seeds with long caudate appendages. 



Inflorescence exceeding the erect bracts; capsule 4.6-6 



mm. long, usually exceeding the calyx . 

 Inflorescence exceeded by 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. 

 J. Leaves flat (or in age becoming involute) k. 

 k. Auricles at the summit of the sheaths scarlous, 

 whitish, conspicuously extended beyond the 

 point of insertion ; bracts exceeding the inflo- ' 



rescence I. 

 I. Gapsule 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 florlferous branch- 

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

 Ultimate floriferous branculets widely spread- 

 ing, 0.5-2 era. long .... iA:) J, tenuis, y. WilUamaii 

 L Capsule less than one half as long as the closely 



appressed sepals 6. J. monofiiic/ius. 



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-S.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 ; 



perianth erect 



Sheaths and auricles cartilaginous, darker ; 



perianth spreading Q. J. Dudleyi, 



Inflorescence brownish ; inner basal sheaths 



strongly purple-tinged . . (9) J, dicTiotomua, v . plcUyphyllui 

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



upner surface 9. J. diohoiomus, 



£. 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 cah-x ; seeds 



ovoid, obtuse . 19, ^. Roemerianus. 



Capsule ellipsoid, slightly exceeding the calyx ; seeds with 



long caudate tips . . . . *tO. t/". maritimue. 



Leaves flat, grass-like. ' 



4. J, tenuis. 



7. J. aeczmdus. 



6. J. interior. 



