DESCRIPTIONS OF TRIBES AND GENERA. 



175 



Sub- tribe C. — Leptureae. 

 Spikelets transverse; starch-grains compound. 



279. (269) Lepturus Brown. In habit like the genus 

 Monerma, but with two nearly equal, approximate empty 

 glumes opposite in the terminal spikelet. Low annuals. 



Sec. I. Eulepturus. Spikelets one-flowered. 



Species one, from the Baltic Sea to Egypt along the 

 coast ; the second in the Mediterranean regions and 

 through the Orient and Hindostan to Australia ; the 

 third from Persia to Afghanistan. 



Sec. II. Plioliurus Trin. (as genus). Spikelets two- 

 flowered. 



Species one, L. Pannonicus Kunth, from Hungary to 

 Trans-Caucasia. 



280. Scribneria Hackel. Rachis not articulate nor 

 excavated ; sj3ikelets frequently in pairs (one pedicellate) 

 on the lower joints [solitary above]. 

 Empty glumes somewhat unequal, ex- 

 centrically keeled, coriaceous ; flower- 

 ing glumes keeled, membranaceous, 

 two-toothed, awned between the teeth. 

 The rachilla prolonged beyond the 

 flower and bearded at the point. 

 Stamens not exserted at flowering time. 

 Stigma short. Grain linear, laterally 

 compressed, unfurrowed. 



Species one (S. Bolanderi Hack., 

 Lepturus Bolanderi Thurb.). A low, 

 delicate annual in California and 

 Oregon. 



281. (270) Psilurus Trin. A delicate 

 grass with very long, slender, curved 

 spikes, the joints not hollowed out. 

 Empty glumes many times shorter 

 than the flowering glumes, the latter 

 finely awned from the point ; rachilla prolonged beyond 

 the flower, often having a second flower ; stamen one. 



Species one (P. nardoides Trin.), South Europe to 

 Afghanistan. 



Ai U A.2 



Fig. 91a. — S cribneria 

 Bolanderi Hackel . 

 A 1, Pedicellate spike- 

 let viewed from the 

 outside. A 2, Same 

 seen from the inside. 

 a, Floret with pro- 

 longation of rachilla 

 detached. (After Hack- 

 el, Bot. Gazette, vol. 

 xi. pi. 5.) 



