Naturalisation in Extra-Tropical Countries. 353 



PaniCTim nigrirostre, Nees. (Setaria nigrirostris, F. v. Mueller.) 



South-Africa. Though annual, this species is valued as a nutri- 

 tious meadow-grass, readily spreading of its own accord. 



Panicum obtusum, Humboldt.* 



The Mosquito- or Mezquite-grass of Mexico. Perennial, nutri- 

 tious ; has strong running stems, which at distances of two or three 

 feet take root, and send up leafy bunches. Dr. Vasey thinks that 

 this grass will show great endurance in droughty seasons. 



Panicum parviflorum, JR.. Brown. 



East- Australia. . On dry hills a fine pasture-grass. P. bicolor and 

 P. marginatum, R. Br., are likewise enumerated by Mr. Bailey among 

 the nutritious grasses of East- Australia. 



Panicum plicatum, Lamarck. 



Southern- Asia, Madagascar. This spacious broad-leaved grass 

 proved hardy as far south .as Port Phillip. Pasture-animals, par- 

 ticularly horses, are fond of it [J. Dixon]. 



Panicum proliferum, Lamarck.* 



Southern parts of North-America. Recorded by Steudel as per- 

 ennial, by Chapman and others as annual. Evidently one of the 

 hardier species, particularly eligible for wet brackish ground [Prof. 

 A. Gray] . Vegetates luxuriantly in the hottest part of the summer, 

 the stems lengthening sometimes to 7 feet, soon bending and then 

 rooting from the lower joints, throwing out numerous shoots from 

 them, which grow rapidly, allowing of repeated cutting ; stems thick, 

 succulent, sweetish, panicles to 2 feet long. Through all stages of 

 its growth this grass is much relished by horses and cattle [Dr. C. 

 Mohr]. Several congeners reach an unusually high geographic lati- 

 tude in North- America. 



Panicum prolutum, F. v. Mueller. 



South-Eastern Australia. Flourishes in the hottest weather ; bears 

 a large panicle of seed. 



Panicum prostratum, Lamarck. (P. seligerum, Retzius.) 



Egypt, South-Asia, North-Australia, perhaps also indigenous to 

 tropical America. Perennial. Recommendable for pastures. 



Panicum pygmseum, R. Brown. 



East-Australia. Forms a soft, thick, carpet-like vendure in forest- 

 shade [Bailey], thus seemingly eligible as a lawn-grass. 



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