310 BOTANY OF SOCOTRA. 



P. macrostachyvm, Hocbst, in herb. Schimp. Abyss, ed. Hobenack n. 2162. 

 P. psilostachyum, Hocbst. in herb. Schimp. Abyss, ed. Hobenack. n. 2256. 



Soeotra. Common. B.C.S. nn. 128, 203, 234. 



Distrib. Cosmopolitan weed. 



A very variable plant in length and stoutness of inflorescence, and in size 

 and clothing of bracts. In Soeotra both a large form with somewhat ciliate 

 glumes and a very small delicate form occur. The latter being sometimes pilose 

 throughout, in other instances having glabrous stems. In these smaller 

 examples the spikes are very commonly reflexed. 



2. P. (Brachiaria) paspaloides, Pers. Syn. i. 81 ; Kunth Enum. ii. 77 ; 

 Webb et Berthelot Phyt. Canar. t. 245. 



Soeotra. Near Galonsir and elsewhere. B.C.S. nn. 225, 323. Schweinf. 

 n. 089. 



Distiub. Tropics generally. 



3. P. (Brachiaria) eruciforme, Sib^h. Flor. Graac. i. t. 59 ; Kunth Enum. i. 

 78 ; Fig. et De Not. Agrostog. JEgypt. Fragm. ii. 17. 



P. Wiyhtii, Nees ab Esenb. 111. Flor. Afr. Aust. 29 ; Acb. Eicb. Tent. Flor. Abyss, ii. 364. 



Soeotra. Near Tamarida. B.C.S. n. 337. 

 Distrib. Tropical Asia and Africa. 



4. P. (Echinochloa) colonum, Linn. Sp. 84; Trin. Sp. Gram. ii. t. 160; 

 Fig. et De Not. Agrostog. ^Egypt. Fragm. ii. 22, t. xii. 



Oplismenus colonus, Kuntb Enum. i. 142. 



Soeotra. Abundant. B.C.S. n. 563. 



Distrib. Tropics of the old and new worlds. Common. 



5. P. turgidum, Forsk. Flor. iEgypt. Arab. 18 ; Kunth Enum. ii. 97 ; Delile 

 Fl. iEgypt. 1 9, t. 9, f. 2 ; Fig. et De Not. Agrostog. ^Egypt. Fragm. ii. 38 ; 

 Trin. Sp. Gram. ii. t. 227. 



Soeotra. Abundant near Galonsir. B.C.S. n. 75. Schweinf. n. 717, 

 pro parte. 



Distrib. Arabia, Egypt, and perhaps Senegambia. Specimens in Kew 

 Herbarium from Senegambia may be this species. 



6. P. Petiveri, Trin. Sp. Gram. ii. t. 176 ; Kunth Enum. i. 91. 



Soeotra. Very common. B.C.S. nn. 23, 51, 67, 127. Schweinf. n. 429. 

 Distrib. Tropical Africa, Asia, and Australia. 



A very variable species, sometimes dwarf, from other localities a large 

 stout plant. The amount of hairiness varies too very greatly. 



