GRAMINA. 



411 



base. Spicules lineari-oblong. Fits. 15-35, 

 obtuse, witb a short point. Sheaths smooth. 

 Root fibrous. Seeds reticulate, a. 6. Woods 

 and sandij, cult, and uncult. s. Eur. 



2. poseformis. Pan. spreading : branches 

 solitary or in pairs ; lower branches hairy at 

 base. Spicules ovato-oblong. Fits. 9-18. 

 Sheaths hairy. Root fibrous, a. 6-8. Sandy 

 uncult. s. Eur. 



3. pilosa. Pan. contracted when in flower. 

 Branches semiverticillate ; lower hairy at base. 

 Spicules linear. Fits. 5-13, acute. Lateral 

 nerves of outer Pale rather indistinct. Sheaths 

 smooth. Root fibrous, a. 7-9. Sandy cult. 

 s. Eur. There seem to he two var. In one, 

 the branches are semiverticillate, and not 

 immediately subdivided ; in the other, the 

 branches are never more than two together, 

 but, being immediately subdivided, have a 

 semiverticillate appearance. 



4. leersioides. "Panicle contracted: 

 branches smooth. Spicules 2-4-flowered. L. 

 flat, exceeding panicle. Sheaths hairless. Culm 

 erect. Root fibrous, a. 6. Sandy shores. 

 Palermo." — Guss.,yroM Peesl. 



5. triticea. "Pan. simple, spike-like. Ra- 

 chis with one nerve, flattened below. Spicules 

 sessile, oval, 6-flowered. Pale 3-nerved. Li- 

 gule exsert. L. flat. Culms diffuse, a. 5. 

 Fields. Palermo."— Guss.,/roM Peesl. 



898. GLYCERIA. 



1. aquatica. Pan. equal, diffuse, much 

 branched. Spicules linear, 5-9-flowered. Root 

 creeping, p. 7, 8. Water. 



2. fluitans. Panicle 1 -sided, very long, 

 slightly branched. Spicules linear, 7-11-flow- 

 ered. Root creeping, p. 6-9. Water. 



p. plicata. "Branches of Pan. semiverti- 

 cillate. Young L. many times folded."— 

 Koch. (Width of outer Pale half the 

 length, Bab.) 



899. SCLEROCHLOA. 



A. Outer Pale subtruncate, nearly cylin- 

 drical. 



i. Nerves indistinct thickenings towards the 

 top of the pale. 

 1. maritima. Pan. contracted when in 

 fruit. Spicules linear, about 5-flowered. Outer 

 Glume 1-nerved ; inner obscurely 3-nerved. 

 Plant with long barren runners, p. 7. Salt 

 marshes. 



3 



2. distans. Lower branches of Pan. long, 

 deflexed or horizontal. Spicules linear, about 

 5-flowered. Outer Glume 1-nerved; inner 

 obscurely 3-nerved. Lateral nerves of outer 

 Pale ciliate at base. Plant without runners. 

 p. 7. Saltish pastures. 



3. Borreri. Panicle rather spreading: 

 branches suberect when in fruit. Outer Glume 

 with 1, inner with 3 nerves. Fits. 3-6. Outer 

 Pale often rather acute, not ciliate at base. No 

 runners. L. flat. p. 6. Salt marshes. Hamp- 

 shire. 



4. convoluta. Pan. somewhat contracted : 

 branches erect. Outer Glume with 1, inner 

 with 3 nerves. Fits. 6-8. Outer Pale with 

 a silky fringe at base of lateral nerve. L. 

 smooth, involuto-setaceous. No runners, p. 

 Salt. Mars. 



ii. Nerves ^, formed of very distinct thichen- 



5. procuxnbens. Pan. ovato-lanceolate. 

 Glumes rigid; outer with 1, inner with 3 

 nerves. Fits, about 4. Outer Pale firm and 

 rigid. L. flat. No runners, a. 7, 8. Dry 

 banks in salt marshes. 



6. dura. Pan. secund, very compact. Spi- 

 cules 3-5 -flowered. Glumes very unequal, 

 both 3-5-ribbed, rigid. Outer Pale very firm 

 and rigid, a, 6. Dry. Fr. G. It. 



B. Outer Pale acute or mucronulate. 

 i. No distinct nerve. 



7. rigida. Pan. rigid, compressed. Spi- 

 cules in 2 rows, adpressed, linear, 5-11-flow- 

 ered. Pale rather obtuse, with a minute point. 

 Root fibrous, a. 6. Walls and dry banks. 



j3. hemipoa, Guss. Outer Pale acute, point- 

 less. L. at last convolute. 



ii. Outer Pale tvith 3 well-defined nerves. 

 Intermediate spaces even. 



8. loliacea. Spike simple or somewhat 

 branched at base, linear. Spicules in 2 rows, 

 erect, 8-12-flowered. Outer Pale somewhat 

 boat-shaped, subobtuse. Root fibrous. a. 

 6, 7. Gravelly shores. 



9. Triticum. Spikes in a wide -spreading 

 raceme. Branches divaricate, solitary or in 

 pairs. Spicules lanceolate. Glumes 3-nerved. 

 Axis quite smooth. Culm geniculate, branched 

 at base. a. 5, 6. Sandy shores. Mdt. 



10. divaricata. Spikes in a wide-spreading 

 raceme. Branches divaricate, rather crowded. 



G 2 



