GRAMINE^E 23! 



S. versicolor Fabre. Plant 2-4$ ft. high, with long creeping rhizomes. 

 Leaves very long, rush-like and revolute, at first purplish then green streaked 

 with white. Spikes 3-5, the upper one long peduncled, the others subsessile. 

 Upper glume half as long as the lower one, lanceolate-obtuse. 



Damp, sandy places near the sea, rare. November-March but rarely flower- 

 ing. It grows at the Vieux Salins, the Plage d'Hyeres (sometimes under the 

 Pines), on the Isthmus of Giens, near Frejus, and at Cap Croisette near 

 Cannes. 



ANDROPOGON L. 



Spikelets in twos, sessile or stalked, linear-lanceolate. Spikes digitate, 

 or in pairs or panicles. Fertile glume with a long, bent awn. Seed nearly linear. 

 Plants mostly tall, and often hairy. Ligule reduced to hairs. 



A. distachyos L. Spikes in pairs, terminal. Barren spikelets awned. 

 Stem undivided. Plant 1-3 ft. high. Awn of fertile glume 2 cm. long. 

 Hill-sides and stony places. May- November. 



A. Ischtemum L. Spikes 5-10, fan-like. Barren spikelet awnless. Fer- 

 tile spikelet sessile, with nearly equal glumes, hairy, purplish. Plant 1-2$ ft. 

 high. Awn of fertile glume only 10-15 mm. 



Dry, stony places, borders of fields and slopes. May-October. 



A. hirtus L. Spikes in pairs, panicled. Barren spikelets awnless. 

 Upper part of stalk, common to a pair of spikes, with long hairs. Plant 2-4 

 ft. high, somewhat variable. Awn 2 cm. long. 



Hill-sides and borders of fields, very common. April-November. 



A. ptlbescens Vis. May be no more than a variety of the last with longer 

 awn, longer spikes, and peduncles downy to the top, but not hispid. It grows 

 with the other and is almost as common. April-November. 



A. Jfryllus L. Spikes small, numerous, in long verticillate panicles. 

 The whorled spreading branches are 3-flowered. Plant 2-3 ft. high. 

 Arid, uncultivated ground, uncommon. May-July. 



SORGHUM Pers. 



Spikelets in twos or threes, sessile or stalked, oblong or rather ovoid. 

 Glume of fertile flowers coriaceous, without striae. Seed large, roundish. 



S. halepense Pers. Panicle spreading ; branches and rachis rough. Stalk 

 of barren floret about half as long as the floret. Barren floret extending con- 

 siderably beyond the fertile. Leaves and sheath smooth. Root creeping. 

 Plant 2-6 ft. high. 



Fields and damp places ; introduced from the Orient, but long naturalized 

 on the Riviera. June-September. 



SACCHARUM L. 



Spikelets all fertile, in sets, one sessile and one or two stalked. Usually 

 awnless. Fertile glume without hairs. Pale minute or wanting. The sugar-cane 

 belongs to this genus. 



S. Ravennie L. occurs in marshes in the Var and flowers in September and 

 October. It is 3-6 ft. high, with a silky white branched panicle. 



S. cylindricum Lamk. = Imperata cylindrica P.B. Spike cylindrical, 

 silky and silvery, but spotted with the purple 'styles. Leaves glabrous, narrow. 

 Plant 2-3 ft. high. 



Sands near the sea and rather damp places. Uncommon. June-August. 



ARUNDO L. CANB. 



Spikelets pedicelled, 1-7 flowered, in a large branched panicle. Glumes 

 membranous, equal or the outer larger. Inner glumes membranous, very un- 

 equal. Awn, if any, fine and slender. 



