INTRODUCTION. IX 



Exotic Weeds. 



Botanical Name. Common Name. 



Argemone mexicana, Linii. ... ... Mexican Poppy. 



JBidens pilosa, Linn Cobblers' Pegs. 



Centaurea calcitrapa, Linn. ... ... Star Thistle. 



Centaurea melitensis, Linn Cockspur Thistle. 



Centaurea solstitialis, Willd Cockspur Thistle. 



Gircium arvense, Scop Corn Thistle. 



Circium lanceolatum, Scop. Burr Thistle. 



Emex australis, Steinh Three-cornered Jack. 



Galium aparine, Linn. ... ... ... Burr-weed, Cleavers. 



Kentrophyllum lanatum, D'C "Woolly Thistle. 



Medicago minima, "Willd. Burr medick. 



Nicotiana glauca, Grah Tree Tobacco. 



Onopordon acanthium, Linn. ... ... Scotch Thistle. 



Opuntia vulgar is, Mill Prickly Pear. 



Rosa rubiginosa, Linn. ... ... ... Sweet Briar. 



Tayetes glan dulifera, Sch. Stinking Eoger. 



Xanthium spinosum, Linn. ... ... Bat-burst Burr. 



Xantliium strumarium, Linn Ditch Burr. 



The following is a list of some of the worst of the indigenous weeds : 

 Acce-na ovina, A. Cunn, Ac&na sanguisorbce, VM,Anisacantka bicupsis, F.V. M., 

 Anisacantha divaricata, E. Br., Anisacantlia muricata, Moq., Calotis cune- 

 folia, E. Br., Calotis dentece, E. Br., Galotis hispidula, F.V.M., Calotis 

 lappulacea, Benth., Calotis scabiosifolia, Sond., Calotis scapigera, Hook, 

 Sclerolcena bicornis, Lincll., Tribulus terrestris, Linn., Tribulus cistoides, 

 Linn., and Tribulus liystrix. E. Br. 



Undesirable grasses. It has been often remarked that several of the 

 native grasses whilst young are really good pasture plants, but at the season 

 of ripening their seeds, the latter are irritating and dangerous to the eyes 

 of sheep and often cause blindness. Moreover, the seeds with their adherent 

 awns not only become entangled in the wool which somewhat depreciates its 

 value, but they often enter vital parts and cause death, and no doubt 

 this, in a great measure, is correct. Unfortunately, when the grasses that 

 bear these long seed-awns become old, cattle and sheep seldom or never 

 eat them, consequently they grow and produce seed almost undisturbed. 

 After many years of careful observation, I have arrived at the conclusion 

 that the following species are most to be dreaded on account of their seed- 

 awns or sharp-pointed leaves : Aristidaarenana, Gaud. ; Aristida behriana, 

 F.V.M. ; Aristida calycina, R. Br. ; Aristida depressa, Retz. ; Aristida hygro- 

 metrica, E/. Br. ; Aristida leptopoda, Benth. ; Aristida ramosa, B>. Br. ; Aristida 

 stipoides, E/. Br, ; Aristida vagans, Cav. ; (these Aristidas are commonly 

 known as " three-awned spear grasses"); Heteropogon contortus, Eoern. et 

 Schult ; Heteropogon insiffnis, Thu. ; Pollinia irritans, Benth. ; Stipa 

 aristiglumis, F.Y.M. ; Stipa flavescens, Labill. ; Stipa micrantJia, Cav. ; Stipa 

 pubescens, E. Br. ; Stipa scabra, Lindl. ; Stipa semibarbafa, E. Br. ; Stipa 

 setacea, E.Br. (these Stipas are commonly known as "spear," "corkscrew," and 

 "wire" grasses) ; Triodia cunningliamii, Benth.; Triodia irritans, E. Br. ; 

 Triodia mitchellii, Benth. ; Triodia microstachya, E. Br. ; Triodia procera, 

 E. Br. ; Triodia pungens, E. Br. (these Triodias are commonly known as 

 " porcupine" and " spinifex" grasses ; the latter term, however, is a generic 

 one given to quite distinct grasses, therefore, must not be confounded with 



