12 TRIANDRIA. 



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

 rula odorata), and giving the well-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 j one with a straight awn from the 

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

 small j valves membranaceous, obtuse, equal. 



III. TRIANDRIA. 



1. MONOGYNIA. 



* Flowers superior. 



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

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

 red on one side at the base. Fruit crowned with the feathery 

 pappus. Seed 1. 



2. FEDIA. Cal. toothed. Cor. mbnopetalous, 5-cleft, gibbous 

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



3. IRIS. Perianth single (Cor. of Auth ), 6-cleft, petalous, each 

 alternate segment reflexed. Stigma petaliform. 



* * Flowers inferior, glumaceous. 



4. SCHOENUS. 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. Cat. Glumes of 1 valve, 1 -flowered, imbricated 

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

 Fruit naked or with bristles at the base. 



6. ERIOPHORUM. Cal. Glumes of 1 valve, 1- flowered, 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 I -flowered (except Arundo Phragmites). 

 t Flowers perfect (each having Anthers and Pistils) . 



-*- Cor. of 1 valve. 



9. ALOPECURUS. Cal. 2-valued, valves nearly equal, acute, 



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



-t- 4- Cor. of 2 valvesr 



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

 very small. Seed invested with the permanent hardened co- 

 rolla. 



