A FLORA OF GIBRALTAR AND THE NEIGHBOURHOOD 91 



j;B.Friesii G. &, G. Damp grassy places ; rare? 5-6. Panicle 

 much as last, perianth segments spinose-dentate. III. ii. S. de 

 Luna in Los Barrios district, Nilss. 



B. pidcher L. Dry gravelly and sandy ground ; common ; 

 4-6. Panicle divaricately branched, leaves panduriform, perianth 

 segments spinose-dentate. I. Near Farringdon's ! Governor's 

 Cottage! II.! III.! 



B. hucephalopJiorus L. Chiefly cultivated fields ; very abun- 

 dant; 4-5. I.! III.! 



fVar.j;e?-e?i«a«s \Vk. is aperennant form. I. II. or III. Mobile 

 sand at Gibraltar, and grassy places in the Bay, Wk. II. D. 

 III. i. Sand desert, If., D. 



iB. thyrsoides Desf. {B. intermedins Guss., non DC). Sandy 

 and waste places ; rather frequent ; 4-5. Panicle dense, leaves 

 lanceolate, fruit perianth large, entire. I. ! III. i. Carteia ! 

 Alcadeza ! ii. ! iii. Salt Pans ! 



[B. intermedins DC. non Guss. has quite linear leaves, and a 

 lax panicle. A specimen from San Eoque so labelled by Ball is 

 B. thyrsoides.] 



B. tingitanm L. In deep sand ; rather local ; 4-5. Leaves 

 triangular hastate, often crenately incised. I. Boiss. II. D. 

 III. i. Linea ! Puente Mayorga I ii. Palmones Playazo ! 

 iii. Palmones Village ! 



jB. scutatus L. Rocky and stony places ; rather rare ; 4-5. 



I. Slopes over Europa ! Rocks below Europa Point ! Devil's 

 Gap! III. ii. Railway near Algeciras I 



fVar. glaucus DC. non Boiss. is a very glaucous form, but 

 not otherwise differing from type, with which it grows on the 

 Rock ! 



Var. induratus Ball is very glaucous, the branchlets becoming 

 indurated and spinescent, and outer perianth segments more 

 reflexed. I. Rocks at Europa Point, iiT., Z).? I think it probable 

 that var. glaucus DC. has been mistaken for it. 



Polygonum equisetlfonne Sibth Sz Sm. Sandy ground near 

 sea; rare; 6-10. 3-4 ft., stem thick and woody, branches erect 

 and virgate, or sometimes drooping, inflorescence leafless. III. i. 

 Almendral ! Guadarranque Ferry ! ii. Palmones Playazo ! 

 iii. Palmones Village ! Guadacorte Marshes ! 



P. maritimum L. Deep sand near the sea ; occasional, formerly 

 frequent; 4-11. I. North Front Sentry Fence! Catalan Bay! 



II. K., D. III. i. Linea, K., D. ii. Algeciras, Nee. iii. Pal- 

 mones, -ST., D. 



P. aviculare L. Waste and cultivated ground; common ; 4-11. 

 Varies less than in Britain. I think var. agrestinum Jord. is 

 common, and var. arenastrum Jord. less so. I. North Front ! 

 Reclamation Road ! III. ! 



P. Boherti Lois. (P. Bali Bab., P. aviculare var. vegetum 

 Ledeb. ?). Waste and sandy ground ; frequent; 4-11. I retain 

 this name to cover a species otherwise resembling P. Baii, but much 

 stouter, and obviously perennial, with a thick woody stem. It is 

 sometimes so large as to resemble P. equisetiforme, though usually 



