TRIANDRIA.— MONOGYNIA. 31 



33. KYLLINGIA. Cyperoidece. 



K. monocephala : stem filiform, 3-angled ; head 

 globose, sessile ; involucrum 3-leaved, very long. 



HAB. — If. Root creeping; clum 3-12 in, high; 

 head solitary. 



34. SCIRPUS. Club-rush. Cyperoidece. 



* Seed surrounded with bristles at the base. 



t Style articulated to the seed; base dilated and persistent 

 Seed often lenticular. [Spike solitary.) 



%. S. tenuis: culm very slender, quadrangular; spike 



elliptical, acute at each end ; glumes Ovate, obtuse ; 



stamens 3 ; style 3-cleft ; seed rugose. 



HAB, Wet places. July — Aug. U • Culmnaked, 8 — 12 



in. high ; head brown; bristles 2-3, sometimes wanting. 



2. S. glaucus : culm many-angled, glaucous ; spike ovate. 



acute ; glumes ovate, obtuse, or emarginate ; stamens 

 3 ; style 2-cleft. 

 HAB. Borders of salt marshes. July. U . Culm slender, 

 lft. high; spike brownish ; bristles 4. 



3. S. palustris : culm terete, inflated ; spike oblong- 



lanceolate ; glumes somewhat obtuse ; seed roundish, 

 punctate and rugose ; bristles scabrous. 

 HAB. Wet places. June. If. Cespitose ; culm 1-2 

 ft. high, sheathed at the base, leafless; seed crowned 

 with a conical tubercle. 

 ■♦ S. capitatus : stem terete, or somewhat compressed : 

 spike ovate, obtuse ; seed oval, compressed, smooth. 

 HAB. Wet places. July — Aug. If. Cespitose ; culm 

 attenuated below the spike ; spike often globose ; bris- 

 tles 6. 

 >. S. acicularis : culm setaceous, quadrangular ; spike 

 ovate, acute, 3 — 6-flowered ; glumes somewhat ob- 

 tuse ; stamens 3 ; style bifid ; seed obovate. 

 HAB. Border of ponds. June — July. If. Culm 

 almost hair-like ; inf. glume empty , large ; seed stri- 

 ate; bristles 4. 

 f}. S. pusillus : culm compressed and a little angular; 

 spike ovate, compressed ; seed obovate ; stamen* 

 Btyle 2— 3-cleft. 



D 



