404 



881. DESCHAMPSIA. 



dal. x\wn short, from base of outer pale. 

 Axis hairy. L. iJat, very rough above. Root 

 tufted, p. 6, 7. Woods and moist meadows. 



2. Vifibeliana. Pan. diffuse, oblongo-py- 

 ramidal. Awn setaceous, equalling outer pale. 

 L. flat, rather rough above. Eoot stolonife- 

 rous. p. 6, 7- Wet sandy hanJcs. Elbe. 



3. juncea. " Pan. spreading, very obtuse. 

 Outer Pale villous at base, and a\^'ned, toothed 

 at top ; inner smooth, bifid." — Kunth. 

 " Glumes acute, about as long as truncate pale. 

 Awn hardly equalling glumes. L. convoluto- 

 setaceous." — Duby. a. 6. Dry. Mtp. Sis- 

 tei'on. Gap. Sienna. Pisa. 



882. LAGUEUS. 



1. ovatus. Root-L. and Spike vvooUy. 

 a. 5. Dry. s. Eur. 



w 883. TRISETUM. 



1. subspicatum. Pan. spike-Uke. Glumes 

 nearly equal, 1 -nerved. Awn reflexed. Fits. 

 3, nearly sessile, rough, with a fevv hairs at the 

 base. p. 7, 8. Very high. Sw. Sav. Pdm. 

 Pyrenees. 



2. condensatuiu. Pan. ovoid, contracted 

 when in fruit. Glumes nearly equal; inner 

 8 -nerved. Fits. 2-3, with a naked caUus. 

 Eachis hauy, but not bearded. Awn from 

 above middle of pale, nearly straight. L. flat, 

 hairless, a. 5, 6. Dry hills and waysides. 

 Terrac. Sic. 



3. neglectum. Pan. oblong. Glumes 

 very unequal, the outer not being half the 

 width of the inner. Fits. 4. Awn from about 

 middle of pale, somewhat recui-ved. L. hairy. 

 Eoot fibrous, a. 6. Meadoios and waysides. 

 Cors. s. It. Sic. 



4. parviflorum. Pan. spreading, much 

 branched. Spiciiles small, numerous, 2-flow- 

 ered. Glumes very unequal. Axis hairless. 

 Awn short, from near summit of pale. L. 

 pubescent, a. 4, 5. Oimn fields. Pisa. Sic. 

 Sardinia. 



5. myrianthuiu. Pan. much branched. 

 Spicules small, numerous. Glumes nearly 

 equal: outer 1 -nerved ; inner 3 -nerved. Fits. 

 2, with 2 tufts of very short hairs at base. 

 Awn from middle of back. L. and Sheaths 

 smooth externally, a. 6. Fields. Milan. — 

 Bert. 



6. fiavescens. Pan. equal, diffuse. Glumes 

 very unequal. Fits, about 3, exceeding calyx. 

 Axis with a very short beard. Outer Pale 5- 

 nerved. Root somewhat creeping, p. 6, 7- 

 ■Meadoios. 



7. argenteum. Pan. equal, diffuse. Fits, 

 about 3. Glumes rather unequal: outer 1- 

 nerved ; inner 3 -nerved. Hairs of Axis about 

 one-thfrd as long as floret. Outer Pale 1- 

 nerved. L. distich, smooth. Throats of 

 Sheaths hairy, p. 7, 8. High pastures. Alps. 



8. distichopliylluin. Pan. equal, diffuse. 

 Fits, about 2. Glumes rather unequal : both 

 3-nerved at base. Beard more than half as 

 long as floret. Outer Pale 3-5-nerved. L. 

 distich, somewhat downy. Throat of Sheaths 

 hairless, p. 8, 9. High 'pastures. Alps. 



9. gracile. " Rac. short, ovate, nearly sim- 

 ple. Spicules 3-flowered. Glumes shoi'ter than 

 florets. Axis with a dense, rather short, dirty- 

 white beard. Outer Pale 5 -nerved, villous from 

 base to awn, which is fixed below middle of 

 pale. Root-L. involuto - setaceous, smooth. 

 Culm smooth. Root fibrous, p. 6. Moun- 

 tain pastures. Sard. An excellent species, 

 by no means to he confounded with T. disticho- 

 phyllum." — Beet. 



10. Cavanillesii. Pan. contracted, short. 

 Glumes very unequal, 1 -nerved and 3-nerved. 

 Fits. 2. CaUus and short Rachis with very 

 long hairs. Pale hairless. Awn from above 

 middle, a. 4. Monte Baldo. VaU. Very rare. 



11. villosum. "Rac. compound, oblong, 

 nodding, somewhat spreading when in flower. 

 Spicules 2-flowered. Glumes unequal : outer 

 1-nerved ; inner 3-nerved. Fits, about equal- 

 ling calyx, with a silky, rather long beard on 

 the base and axis ; awned from above the 

 middle. Sheaths and outside of L. hairless. 

 Culm villous. Root creeping, p, 7. Calc. rocks. 

 Monte Cornu. Rio Sacro." — Bert. 



12. tenue. Pan. equal. Glumes 7-9- 

 nerved. Fits. 3, exceeding calyx ; lowermost 

 awned at tip ; others at the back. Root fibrous. 

 a. Dry fields, s. Fr. s. G. n. It. rare. 



884. AVENA. 



A. Plant perennial. Glumes 1-3-nerved. 

 i. Florets not so many as 5. 



a. Ligule long, acute, nearly entire. 

 Sp. 1-4. 



b. Ligide veiy short, ciliato-laccrate. 

 Sp. 5-10. 



