82 44. Eriophoriiiti. 9. CY?ERAC£iE. Plend.pk. 



Root creeping, scaly; culms slender, smooth, a foot high, 

 round, 3-sided above; leaves long, slender, acutely keeled, 

 edge smooth; panicle 4 to 8-spiked; hractecB leaflike, un- 

 equal ; spike sometimes dioicous or polygamous. 



^. Alp'inum. Panicle 2 or 8-spiked. 



5. Eriopho7-um gracile. Slender coltongrass. 



Calami 3-sided ; leaves filiform, 3-sided, channelled ; 

 spike erect, peduncled, overtopping the bracteae ; peduncles 

 rougli. 



Eriophorum triquetruitij Hoppe Bot. Tascli. 1800, 108. 

 Eriophorum gracile, Roth Catal. 11. Appendix. 

 Linagrostis paniculata /S, La March Fl. Fr. 3, 555. 



Bogs; perennial; April. 



Roots creeping ; culms slender, 1 8 in. high ; leaves chan- 

 nelled at bottom ; lower sheaths brown ; spikelets 3 or 4^ 

 oblong, fruitbearing, drooping; peduncles unequal. 



V. 10. GRAMINE^. 



Flower hermaphrodite, or unisexual, glumaceous; glumes 

 1, 2, or many flowered, or 2-rowed on a common rachls : 

 spathelles 2 or none; glumelleofl or 2 spathellules; spathel- 

 lules dissimilar; outer mostly carinate, 1 or many-ribbed, 

 awnless, bristled, or awned; lower mostly 2-ribbed, awnless, 

 rarely 2-awned, sometimes more ; lodicule 1 or 2, hypogy- 

 nous, small, inserted mostly side by side between the ex- 

 ternal spathellule, and the stamens, rarely opposite, alter- 

 nating with the valves, or wanting; stainens S, hypogynous, 

 rarely 1 or 2; anthers 2-celled, 2 forked; ouary 1, free, 

 1 -seeded; style 2 or 3; stigmata feathered, hispid, or as- 

 pergilliform ; cariopsis membranaceous; corculum small, ba- 

 sillary; perisperm farinaceous. — Herb annual or perennial; 

 root fibrous ; culm cylindrical, fistulous, jointed, mostly 

 simple; leaves alternate, 1 at each joint, sheathing; sheath 

 divided lengthways ; flowers small, panicled or spiked. 



1. Locustce all alike; flowrets enclosed in the same 



receptacle. Monothalama. 



A. Axis not jointed ; glumes inserted alternately. 



a. Glumes l-flowered ; lower spaihelle largest. 



Spathellule 1, av/ued; axis spiked; 



spike not involucratcd Alopecurus* So. 



Spathellule 1, awned ; axis panicled; 

 .^uthellule nicked at the apex Agkaulus. 91. 



