260 MONOEC. TR1AND. 



Smaller than the last, with much narrower leaves and catkins. Sterile 

 {lowers, according to Smith, (which in T. latif. have hairs on the 

 receptacle,) mixed with chaffy scales. 



5. SPARGANIUM. 



1. S. ramosum (branched Bur - reed), leaves triangular at the 

 base their sides concave, common flower-stalk branched, stig- 

 ma linear. Lig/itf. p. 539 (S. erectum}. E. B. t. 744 



HAB. Banks of lakes and stagnant waters, not uncommon. Fl. July. 



i V. 



Two feet and more high, with a few sword-shaped leaves or bracteas 

 with broad membranous sheathing bases on the upper or branching 

 part of the culm. Radical leaves very long, linear-ensiform, trian- 

 gular at the base, their sides concave. Sterile /lowers in spherical 

 heads, distantly placed on the upper part of the branches of the 

 culm ; fertile ones below. 



2. S. simplex (unbranched upright Bur-reed), leaves triangular 

 at the base their sides plane, common flower-stalk simple, stig- 

 ma linear. Llglitf. p. 540 (var. of S. ramosum) . E. B. 



{.745. 



HAB. Lightfoot considers this the most common of the two. Ditch near 

 Corstorphine, Maugh. Bog, Robroyston, Glasg., Hopk. Bute, 

 plentiful, Mr. Murray. Appin, Capt. Carmichael. Lakes near 

 Forfar, &c. G. and D. Don. Fl. July. I/ . 



Much smaller than the last. Culm rarely at all branched, though the 

 lower heads of flowers are pedunculate. The sides of the leaves are 

 plane, not concave or grooved. The flowers pale yellow. 



S. S. natans (floating Bur-reed), leaves floating plane, common 

 flower- stalk simple, stigma ovate very short, head of sterile 

 flowers mostly solitary. Lightf. p. 541 . E. B. t. 273. 



HAB. Lakes, ditches, and stagnant waters, not unfrequent, especially 

 in the Highlands. Loch on Dunearn hill, Mr. P. Neill, and peat- 

 pits S. side of Dalmahoy hill, Edinb., Maugh. Frankfield and Mug- 

 doch Lochs, &c. about Glasg., abundantly, Hopk. Fl. July. 11 . 



Leaves very long, linear, pellucid. 



6. CAREX. 



* Spike simple, solitary, the upper part formed of sterile, and the lower 

 part of fertile Jlowers (except in C. dioica and C. Davalliana, which 

 are dioecious). 



1. C. dioica (upright -fruited dioecious Carex), spike simple 

 dioecious, fruit ascending ovate shortly acuminated striated 

 rough at the margin upwards. Lightf. p. 54 1 . E. B. t. 543. 



HAB. Boggy places, especially in the Highlands, common. Pentland- 

 hills and Revelrig-toll, plentiful, Mr. Greville. Not very frequent 

 about Glasg., Hopk. Fl. May, June. 11 . 



,/?oostoloniferous. Culms a span high, smoothish. Stigmas 2. 



2. C. Davalliana (recurved-fruited dioecious Car ex) > spike 

 simple dioecious, fruit ovate much acuminated recurvato-de- 

 flexed smoothish at the margin. E. B, t. 2123. 



