THE I'LANT ECOLOUV OF TUK COAST IJELT OF NATAI-. 41-3 



JSi'o-emone mexicana, Fuinavia officinalis, Poly- 

 ■carpon tetrapliyllum, Waltheria indica, Portulacca 

 oleracea, Anagallis arvensis, Walile iibevgia un- 

 dulata, Asclepias pliysocarpa (217), Oxalis corni- 

 culata, Barlei'ia obtusa, Asystasia coromandeliaiia, 

 Lippia asperifolia, Lantana cainara, A-^erbena offi- 

 cinalis, Leucas martiuicensis, 'J'eucriuiu riparium, 

 Cerathotheca triloba (367), Mirabilis jalapa, Boer- 

 haavia rep ens, Phytolacca strict a (3), P. octandra, 

 Chenopodium ambrosoides, C. botrys, C. inurale. 

 Cannabis sativa, Urtica urens. 



Apart from tlie grasses, there ai'e not many inonocotyle- 

 donous weeds, but most of the Commelinacese (see under 

 " Scrub ^') frequently occur as ruderals, and Cyperus escu- 

 lentus is a troublesome weed. Cyperus albostriatus 

 aud Mariscus dregeanus are common along roadsides. 



Finally, there are a large number of ruderal grasses on 

 the coast belt, mostly species once more of distinct tropical 

 affinities: Digitaria sangninalis, D. ternata, D. liori- 

 zontalis, D. debilis, D. diversinervis, Pauicum 

 brizanthum, P. trichopus, P. crus-pavonis, P. 

 f i 1 i c u 1 m e , P . li y m e n i (j c h i 1 u m , P . as q u i n e r v e , P . 

 chusqueoides, P. zizanioides, P. deustum, P. maxi- 

 mum, P. Ifevifolium, P. iiieyerianum, P. proliferum 

 var. longijubatum, P. dregeanum, P. miliare, Setaria 

 imberbis, S. sulcata, S. nigrirostis, S. verticillata, 

 Pennisetum unisetum, P. typhoideum, Tricholaena 

 rosea, all belong to the tropical tribe of the Paniceas. 



Other common ruderal species of grasses are : Chi oris 

 pycnothrix, C. virgata and C. gayana, Eleusine 

 indica, Sporobolus indicus, Eragrostis curvula, 

 E. plana, E. asp era, E. annulata, E. obtusa, E. major, 

 Bromus unioloides, Lolium temulentum, Cynodon 

 dactyl on and the Tambookie grasses, A. nardus var. 

 validus, A. auctus, A. rufns, A. dichroos, A. 

 cymbarius var. lepidus; but many of these, as already 

 indicated, are important in other seres as well. 



