406 



884. AVENA. 



tracted : longer branches bearing 2 or 3 spi- 

 cules. Glume S-neiTed. Mts. 5-6. L. hairless, 

 rough on margin. Sheaths much compressed, 

 2-edged. p. 7, 8. Springy. Sil. Mor. 



12. alpina. Pan. contracted, nearly sim- 

 ple : branches in pairs, rarely 2-flowered. Up- 

 per Glumes 3-nerved. Axis hairy. Fits, about 

 8, awned above middle. L. Knear, very rough 

 on upper surface. Sheaths terete. Root fibrous. 

 p. 7, 8. High mountains. Clova. Cam. 



13. longifolia. "Pan. erect, contracted. 

 Mts. 5-8, exceeding unequal glumes. Axis 

 with a few hairs. Outer Pale 7-nerved, acu- 

 minate, shortly bidentate, harry at base. L. 

 narrow, asper on upper surface. Ligules ob- 



long, acuminate, p. 



— DUBY. 



Fine-woods. Narbonne." 



14. pratensis. Pan. contracted, nearly 

 simple : longer branches sometimes bearing 2 

 spicules. Upper Glumes 3-nerved. Axis bearded. 

 Fits. 4-5, awned fi-om the middle. L. rough 

 on upper surface. Sheaths smooth. Culm 

 with one joint. Root fibrous, p. 6, 7. I>Ty 

 meadows. 



15. versicolor. Pan. subovate, nearly 

 simple : the branches bearing 1 or 2 spicules. 

 Upper Glume 3-nerved. Axis hairy. Pales 

 asper. L. flat ; upper surface nearly smooth. 

 Ligule oblong, subacute. Root fibrous, p. 7, 8. 

 Sigh pastures. Alps. Mountains of Carrara. 



B. Plant perennial. Glumes h-^-nerved. 



16. alba. Pan. erect, lax, narrow. Fits. 

 2, only one of them awned. Inner Glume ob- 

 tuse, as long as pale. Pale 7-nerved, acumi- 

 nate, vrith short hairs at base. p. Prades. 

 — DuBT. Appearance of A. sativa, Vahl. 



C. Annual. Spicules drooping after flowering. 

 Glumes h-'d-nerved. 



i. Base of Outer Tale, as far as middle, covered 

 with long hairs. 



17. sterilis. Pan. 1-sided. Fits. 4-5, 

 falling short of calyx ; the 2 lower awned and 

 hairy ; upper awnless and smooth, a. 7. Corn. 

 It. Istria. 



18. fatua. Pan. difliise, equal. Fits, 

 about 3, falling short of calyx ; all hairy and 

 awned. Outer Pale ending in lanceolate, 

 finely acute divisions. Root fibrous, a. 6, 7- 

 Corn. 



19. hirsuta. Pan. one-sided. Fits. 2-3, 

 very hairy, as long as calyx, with a geniculate, 

 dorsal awn, and two long setiform teeth. Root 

 fibrous, a. 5, 6. Corn. Roofs, s. It. Sic. 



ii. Base of outer Pale smooth. 



20. strigosa. Pan. one-sided. Fits, about 

 3, as long as calyx ; each with 1 awn and 2 

 long setas ! Awn dorsal, generally very long. 

 a. 7, 8. Escapes from cultivation. 



Besides these, we find infield cultivation, and 

 occasionally escaping, but not maintain- 

 ing themselves, the following annuals: — 



21. orientalis. Pan. secund. Fits. 2, 

 falling short of the glume. Pale indurated. 



22. nuda. Pan. secund. Fits. 3, exceediug 

 glume. Pale membranous. 



23. brevis. Pan. secund. Fits. 2, ex- 

 ceeding glume. Fits, obtuse ! 



24. sativa. Pan. spreading all round. 



885. GAUDINIA. 



1. fragilis. Cuhn branched. Sheaths and 

 L. pubescent. Spicule solitary, 5-7 -flowered, 

 smooth, a. 6, 7- P>ry. s. Eur. 



886. ARRHENATHERUM. 



1. avenaceum. Pan. diffuse. Upper Fit. 

 with a short, straight awn. Root knobby. L. 

 harsh. Glumes unequal, smooth, p. 6-8. TJn- 

 cult. 



2. Thorei. Pan. erect. Upper Fit. awn- 

 less. Axis haiiy. Outer Pale pubescent, acu- 

 minate, entire. L. convolute, rigid, very long. 

 Knobs and lower Sheaths downy, p. Dry 

 heaths. Dax. 



887. HOLCUS. 



1. lanatus. Pan. equal. Awn of ban-en 

 Fit. recurved, included in calyx. Root fibrous. 

 p. 5-7. Meadows. Not in s. It. 



2. mollis. Pan. equal. Awn of barren 

 Fit. geniculate, protruded. Root creeping, p. 



7. Shade. 



888. DANTHONIA. 



1. decumbens. Awn short, straight. Pan. 

 nearly simple, contracted, few-flowered. Spi- 

 cules 3-4-flowered. Cal. about as long as Fits. 

 L. and Sheaths haiiy. p. 6, 7- Barren pas- 

 tures. Not in s. It. 



2. provincialis. Awn long, twisted. Fits. 

 5-6. L. smooth, throat hairy ; lower convo- 

 luto-setaceous. p. 6, 7. Hill pastures. Gap. 

 Sisteron. Carin. Carn. 



