SO AN INTRODUCTION 



CHAP. VL 



OF THE THIRD CLASS TRIANDRIA. 



THIS Class consists of such plants as bear herma- 

 phrodite* flowers, furnished with three Stamina. The 

 orders are three, viz. 



ORDER I. MONOGYNIA, comprehending such N 

 plants as have but one style. This order contains 

 thirty-five genera, distinguished into, 1 . Those whose 

 flowers are seated above the germen, of which there 

 are eleven, viz. Valeriana, Melothria, Crocus, Iris, 

 Moraea, Antholyza, Gladiolus, Witsenia, Ixia, Aris- 

 tea, and Dilatris. 2. Those with flowers under the 

 germen ; of which there are fifteen,- viz. Commelina, 

 Wachendorfia, Hippocratea, Loeflingia, Willichia, 

 Tamarindus, Callisia, Rumphia, Cneorum, Xyris, 

 Comocladia, Olax, Rotala, (.)rtegia, and Polycnemum. 

 3. Such as have flowers like those of the grasses, with 

 valves of that sort of glume or husk which serves as a 

 calyx ; of which there are nine, viz. Schoenus, Cy- 

 perus, Scirpus, Eriophorum, Lygeum, Nardus, Kyi- 

 lingia, Fuirena, and Pommereulla. 



OKDER II. DIGYNIA, comprehending such plants 

 as have two styles. This order contains thirty- one 

 genera, divided" into four sections. The first includes 

 such genera as have the flowers loose or scattered, 

 and one flower on a peduncle ; of which there are 

 fifteen, viz. Perotis, Saccharum, Bobartia, Panicum, 

 Cornucopiae, Aristida, Alopecurus, Phleum, Phalaris, 

 Paspalum, Milium, Agrostis, Dactylis, Stipa, and 

 Lagurus. 2. Those genera with flowers scattered and 

 two flowers on a peduncle ; of this section there are 

 two, viz. Aira and Melica. 3. Those with more than 

 two flowers on a peduncle, scattered, of which there 

 are seven, viz. Uniola, Briza, Poa, Festuca, Bromus, 

 Avena, and Arundo. 4. Flowers in a spike on a 



4 



