14 TRIAND. MONOG. 



veloping the seed, valves lanceolate, ext. with or without an 

 awn, inserted below the extremity. 



ft 'Calyx of 2 valves. 



19. SESLERIA. Cal, 2 3-flowered, compressed, acute, some- 

 what awned. Cor. variously toothed or awned. Seed free, 

 covered with the Cor. 



20. POA. Cor. 2-valved, valves sub-ovate somewhat acute, awn- 

 less. Seed free, covered with the Cor. 



21. BRIZA. Cor. 2-valved, ventricosCj the valves cordate, ob- 

 tuse, awnless. Seed adnate with the Cor. 



22. DACTYLIS. Cal. valves unequal, the larger 1 -keeled. Cur. 

 2-valved, valves lanceolate, awnless. Seed invested with the 

 permanent hardened Cor. 



29. ELYMUS. Cal. lateral, in pairs or ternate, the valves nearly 

 equal. Cor. firmly enveloping the seed, valves lanceolate, 

 ext. acuminate or lengthened into an awn. (Fl. spiked.) 



24. FESTUCA. Cal. valves opposite, unequal. Cor. of 2 valves^ 

 lanceolate, ext. one acuminate, or awned at the extremity. 



27. TRITICUM. Cal. valves opposite, solitary, nearly equal. 

 Cor. 2-valved, valves lanceolate; ext. one acuminate or length- 

 ened into an awn. See-.d adnate with the Cor. Rachis zigzag, 

 toothed. (Fl. spiked.) 



25. BROMCJS. Cor. bivalved, valves lanceolate : ext. one awned 

 below the extremity. Seed adnate with the Cor. (Inner valve 

 fringed. Sm.) 



26. A VENA. Cor. bivalved, valves lanceolate, firmly inclosing 

 the seed : ext. one bearing a twisted awn on its back. 



23. CYNOSURUS. Cal. 2 5-flowered, having a pectinated in* 

 volucrum. Cor. valves linear lanceolate : ext. awnless or 

 awned below the extremity. Seed incorporated with the Cor. 



3. TRIGYNIA. 



32. MONTIA. Cal. of 2 leaves. Cor. of 1 petal. Caps. 3-valved, 

 3 -seeded. 



1. MONOGYNIA. 



1. VALERIANA. 



* Corolla spurred. Stam. 1. (Centranthus, D. C.) 



1 . V. rulra (red Valerian], leaves ovato-lanceolate.E. B. 1. 153 1 * 

 HAS. Old walls at Inverleith, Mr. E.S.Maughan. (I fear escaped from 

 a garden, as in England. Its native country is the South of Eu- 

 rope.) Fl. July. 5 



One foot or more in height, glabrous, sometimes glaucous. Leaves, 

 as in all this and the following genus, opposite,, and flowers corym- 

 bose. Here thejlowers are rose-coloured. 



