116 A FLORA OF GIBRALTAR AND THE NEIGHBOURHOOD 



rare ; 6-7. III. i. Queen of Spain's Chair ! ii. Mountains 

 beyond Waterfall ! (2259). Dr. Stapf has only seen the latter 

 specimen, which he considers inseparable from type. 



Var. oropJiila Hack, has a denser panicle with less spreading 

 branches. III. ii. Summit of S. de Palma, Rev. Probably same 

 station as mine. 



Avena sterilis L. Dry fields and waste places ; frequent; 4-6. 

 Spikelets much larger than in next, only one floret disarticulating. 

 I. Thinly scattered ! III. i. and ii. ! 



[Var. maxima P. L., a stout form, and var. scabriuscnla P. L., 

 a more slender one, with lower part of awn scabrid, not villous, 

 are said to be as common as type in province.] 



A. barbata Brot. Similar places ; common; 4-6. All florets 

 disarticulating. I. ! III. i. and ii. ! 



A. sulcata J. G&y. Kough bushy places; rare; 4-6. Lower 

 pale with 5-7 strong nerves, glabrous, with a tuft of hairs at base 

 as long as pale. III. ii. S. de Luna, Winkl. 



A. albinervis Boiss. Similar places; locally frequent; 4-6. 

 Lower pale much less strongly nerved, hairy in low^er third. 

 III. i. Queen of Spain's Chair ! Majarambout Crags ! Almoraima, 

 Porta d Iiigo\ labelled A. bromoides var. microstacluja Wk. ii. 

 Slopes beyond Waterfall ! 



A. bromoides Gouan. Similar places ; rare ; 5-6. I. Medi- 

 terranean Steps ! Willis's ! 



i Arrhenathermii elatius M. & K. Dry bushy places and woods; 

 frequent ? 5-6. III. i. Near San Roque, Brouss. ii. Near 

 Algeciras, liev. iii. At Palmones, Rev. Perez Lara has not seen 

 this or the variety in the province, and suspects that the next 

 species may have been mistaken for it. 



iVar. bulbosum Gaud, differs only in the base being swollen into 

 one or more superposed bulbs, and is the only form I have seen. 

 III. i. Queen of Spain's Chair, frequent ! ii. About the Water- 

 fall ! ? Perhaps ^. jjaZ/fins has been mistaken for it in the last 

 station. 



A. erianthum B. & R. Similar places ; rare, but common else- 

 where in the province ; 4-6. Differs from last in larger spikelets, 

 awn produced from base instead of from middle of pale, and per- 

 fect floret longly hirsute all over except at apex. III. ii. Below 

 Waterfall ! 



t^. iMllens Link. {A. Thorei Duby). Similar places; local; 

 5-6, Spikelets smaller, both florets usually fertile, awn above 

 middle of pale. III. ii. Mountains above Algeciras, B. c& Fc. ! 

 Waterfall Valley ! S. de Palma, Winkl. 



Trisetum Dufo^lrei B. & R. Sandy fields and woods ; occa- 

 sional ; 4-5. Ligule a ring of hairs, spikelets 2-flowered, awn 

 2-3 times as long as setse of pale. III. i. Sandy woods near 

 San Roque, B. i(: R. ! Cork Woods ! ii. Palmones Pinar ! (959 

 and 1907). Probably Reverchon's " near Palmones River." iii. 

 Lane from Guadarranque to Guadacorte ! 



Var. lasianthum P. L. has a very short lacerate ligule, not 

 reduced to hairs, larger 3-flowered awnless spikelets, and more 



