12 TRIANDRIA. 



A foot high ; smell (when in the act of drying) like IVoodruff {Aspe- 

 rula odorata), and giving the Nvell-known scent to new-made hay. 

 Leaves short. Panicle compact, spiked, yellow in age. Flowers 

 lanceolate, valves of the cal. unequal, very sharp-pointed, slightly 

 pubescent ; valves of the ext. cor. as long as the smaller valve of the 

 cal., very obtuse, hairy, brown; one with a straight awn from the 

 back, the other with a twisted awn from near the base; int. cor. very 

 small ; valves membranaceous, obtuse, equal. 



III. TRIANDRIA. 



1. MONOGYNIA. 



* Flov)ers superior. 



1. Valeriana. Cal. involute, at length unfolding into a fea- 

 thery pappus. Cor. monopetalous, 5 -cleft, gibbous, or spur- 

 red on one side at the l)ase. Fridt crowned with the feathery 

 pappus. Seed 1. 



2. Fedia. Cal. toothed. Cor. monopetalous, 5 -cleft, gibbous 

 on one side at the base. Fruit 3-celied, 2 generally abortive. 



3. Iris. Perianth single {Cor. of Auth ), 6-cleft, pctalous, each 

 alternate segment reflexed. Stigma petaliforni. 



* * Flowers inferior, glumaceous. 



4. ScHCENlis. Cal. Glumes of 1 valve, imbricated on all sides, 

 the exterior ones smaller, sterile. Cor. 0. Fruit naked, or 

 ■with bristles at its base. 



5. SciRPUs. Cal. Glumes of 1 valve, 1 -flowered, imbricated 

 on all sides, 1 or 2 of the outer ones sometimes sterile. Cor, 0. 

 Fruit naked or with bristles at the base. 



6. Eriophorum. Cal. G/z/me5 of 1 valve, l-flovvercfl, imbri- 

 cated on all sides. Cor. 0. Fruit with very long silky hairs 

 springing from the base. 



7. Nardus. Cal. 0. Cor. of 2 valves. 



2. DIGYNIA. 



* Calyces l-Jiowered (except Arundo Phragmites). 



■\- Flowers perfect (each having Anthers and Pistils) . 



+- Cor. of 1 rmlve. 



9. Alopecurus. Cal. 2-valved, valves nearly equal, acute, 



united at the base. Valve of the Cor. awned at the base. 



+- -f- Cor. of 2 valves.^ 



8. PanicCm. Cal. of 3 valves, single flowered, the third valve 

 very small. Seed invested with the permanent hardened co- 

 rolla. 



