ILLUSTRATIONS. 



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PLATES. 



Facing page. 



Ichnanthus mayarensis (Wright) Hitchc . 12 



Ichnanthus tenuis (Presl) Hitchc. & Chase 12 



Ichnanthus nemorosus (Swartz) Doell 12 



Ichnanthus pallens (Swartz) Munro 12 



Ichnanthus axillaris (Nees) Hitchc. & Chase 12 



Ichnanthus lanceolatus Scribn. & Smith 12 



Ichnanthus nemoralis (Schrad.) Hitchc. & Chase 12 



Ichnanthus mexicanus Fourn 12 



Ichnanthus ichnodes (Griseb.) Hitchc. & Chase 12 



Lasiacis prooerrima (Hack.) Hitchc 32 



Lasiacis rugelii (Griseb.) Hitchc 32 



Lasiacis griseoachii (Nash) Hitchc 32 



Lasiacis oaxacensis (Steud.) Hitchc 32 



Lasiacis ligulata Hitchc. & Chase 32 



Lasiacis rhizophora (Fourn.) Hitchc 32 



Lasiacis leptostachya Hitchc 32 



Lasiacis harrisii Nash 32 



Lasiacis divaricata (L.) Hitchc 32 



Lasiacis glooosa Hitchc 32 



Lasiacis sloanei (Griseb.) Hitchc 32 



Lasiacis patentiflora Hitchc. & Chase 32 



Lasiacis sorghoidea (Desv.) Hitchc. & Chase 32 



Lasiacis ruscifolia (H. B. K.) Hitchc 32 



Lasiacis anomala Hitchc." 32 



TEXT FIGURES. 



Page. 



Brachiaria erucaeformis - 37 



Brachiaria ophryodes 3S 



Brachiaria ciliatisswia 39 



Brachiaria meziana 40 



Brachiaria platyphylla 41 



Brachiaria plantaginea 42 



Cenchrus myosuroides 52 



Cenchrus catharticus 54 



Cenchrus distichophyllus 55 



Cenchrus pilosus 56 



Cenchrus viridis 57 



Cenchrus echinatus 59 



Cenchrus insularis . 63 



Cenchrus gracillimus 64 



Cenchrus incertus 65 



Cenchrus microcephalus 67 



Cenchrus pauciflorus 68 



Cenchrus pauciflorus 69 



Cenchrus trxbuloides 73 



Cenchrus palmeri 75 



VII 



