NORTH AMERICAN 13 



scapes with 5 to 7 flowers on long pedicels, ca- 

 lix lanceolate acute, segments of corolla linear 

 acute, 3 or 4 as in Littorella, some flowers ge- 

 minate. 



749. RIVINA or PIEKCEA ACUMINATA Raf. 

 RID. levis of Mg. and Nut. In Col. Herb, not of 

 Antilles nearer to brasiliensis ! Herbaceous 

 smooth, stem branched sulcate, leaves ovate 

 oblong acuminate base rounded, margin subre- 

 pand ; racemes axillary erect longer than leaves 

 From Florida to Arkanzas, 2 or 3 feet high, 

 leaves 3 inches long thin and petiolate, racemes 

 4 to 6 inches long, flowers white, sepals of peri- 

 gone 4 ovatoblong obtuse persistent and green- 

 ish after anthesis, stamens 4 or isopere as in 

 the real Gr. Picrcea of Miller, see rny fl. tellur. 

 635, Riviria having 8 or 12 stamens. Habit 

 like Phytolaca but berries globular one seeded, 

 types of Nat. Family RIVINIDIA fl. tel. 634. 



750. RIVINA or PIERCEA OBLIQTJATA Raf. 

 Riv. humilis of some Am, bot. not of Antilles 

 Herbaceous nearly smooth stern simple sulcate, 

 leaves ovatoblong subrepand, base commonly 

 obliqual, end attenuate obtuse and mucronate, 

 petiols somewhat pubescent, racemes erect 

 equal to leaves. everal sp. have been blend- 

 ed in R. humilis, this is quite distinct, found in 

 Florida by Baldwin; a small plant hardly pe- 

 dal, leaves smaller 1 or 2 inches long, pubes- 

 cence extending sometimes to nerves and race- 

 mes, these short with fewer and smaller flow- 

 ers, sepals of calix linear oblong obtuse whitish, 

 style elongate, stig. capitate as our botanists 

 have mistaken these two plants (they are not in 

 Elliot) it may be needful to state that the real 

 R. or P. humilis is frutescent quite pubescent, 

 not sulcate, with acuminate leaves and larger 



