VASCULAR PLANTS. 145 



all round, the lowermost ones empty. Perigo- 

 nium oo-setous ; in fruit exserted and silky. U . 



6. Cyperus, L. 



Spikelets $ . Palets imbricate, distichous, 

 the lowermost empty. Perigonium 0. 



0. 71. inflorescence involuc rate. 



ORDER XXXVI. SPADICIFL0R.2E. 



Inflorescence, a spadix surrounded by a 

 spathe. Bracts depauperate. Ovary superior, 

 1 — oo-loculate; loculi 1-ovulate. Leaves alter- 

 nate with sheathing base. 



Family CI. Typhaceae. 



Flowers diclinous, in a sometimes interrupt- 

 ed club-shaped spadix; each division of which 

 is often protected by foliaceous spathes. Up- 

 per part of spalix $ : perigonium 0; anthers 

 basifixed, irregularly mixed with scales. Low- 

 er portion of spadix occupied by ? flowers 

 Ovaries surrounded at the base by go bristles, 

 sometimes 3 scales; style simple; stigma 1, lat- 

 eral. Fruit a utricle; endocarp copious. Leaves 

 linear, straight-nerved. Aquatic perennials. 



1. Sparganium, Tournef. 

 Flowers in crowded, glomerulate heads. Fil- 



7 



