138. TETRANDRIA. TETRAGYNIA. PotamOgetOn. 



O. gramineim, ic. P. leaves linear-lanced alternate feffile broader than 



the ftipule. Oeof. o(o»*> . 22 Qy. grajfy. 



marinum. 11. P. leaves linear alternate diftincl: fheathing below. 



Oect- 0/0. *> *%(>■ marine. 



li/B. tufillum. 12. P. leaves linear oppoftte and alternate diftincl: expands 



ing at the bafe, Item columnar. feeble. 



175. RUPPIA. Cat. o. Cor. o. Seeds 4, pedicd'd. 

 T..B. mariiima. 1. Ruppia. fia* 



176. SAGINA. Cal. 4-leaved. Petals 4. Cap/. 1- 



cell'd, 4-valved, maay-feeded. 



3 H.Ji. procumbent. I. S. branches procumbent. procumbent 



%.~B- epetala. S. ftem ereclifh pubefcent, flower's alternate petalefs. 



petalefs. 



~E.B. erecla. 2. S. ftemerecl: moftly one-flower'd. eretl. 



virginica. 3. S. ftem erect flowers oppoftte. Virginian. 



177. TILLiEA. Cal. 3~or-4-parted. Petals 3 or 4, 



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



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



aquatic. 

 E.B. mufcofa. 3. T. procumbent, flowers three-cleft. mo/Jy. 



perfoliata. T. leaves leaf-pierced egg'd, coryrhbes terminal flow- 



ers four-cleft. S. leaf-pierced, 



capenjis. T. leaves oblongifh, flowers four-cleft. S. cape. 



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



globular. 

 uragoga. Mygikba. 



CLASS 



