138. TETRANDRIA. TETRAGYNIA. PctamogetOtl. 



gramineumyio, P. leaves linear-lanced alternate Teflile broader than 



the (lipule. g^'^JJy* 



marinum, ii. P. leaves linear alternate difi:in6l fheathing below. 



7nar'ine^ 



pufiUum, 12. P. leaves linear oppofite and alternate diftinci expand- 

 ing at the bafe, ftem columnar. feeble. 



175. RUPPL\. CaL o. Cor, o. Seeds 4, pedicel'd. 

 mar it i ma, i. Ruppia. fea» 



176. SAGINA. Cal, 4-leaved. P^/^/j- 4. Capf.i-, 



celPd, 4-valved, many-feeded. 



procimibens. I. S. branches procumbent. procumbent 



apetala, S. ftem ere6li{h pubefcent, flow^ers alternate petalefs. 



petalefs, 

 ereSia. 2. S. ftem ere^t moftly one-flower'd. • ereci* 



virginica, 3. S. ftem ere£l: flowers oppofite. Virginian, 



177. TILLi^A. CaL 3-or-4-parted. Petals 3 or 4, 



equal. Cap/. 3 or 4, niany-feeded. 



aquatica, I. T. ere6i: two-fork'd, leaves acute, flowers four-cleft. 



aquatic, 

 mufcofa. 3. T. procumbent, flowers three-cleft. 7no[fy. 



perfoUata. T. leaves leaf-pierced egg'd, corymbes terminal flow- 



ers four-cleft. S. leaf-pierced, 



capenfis, T. leaves oblongifti, flowers four-cleft. 5. cape, 



178. MYGINDA. Cal, 4-parted. Petals 4. Drupe 



globular. 

 uragoga^ Myginda. 



CLASS 



