86 TETRANDRIA.— DIGYNIA. 



123. AMMANNIA. Salicarm. 



1. A. raynosior : stem erect, thick, subterete ; leaves 



lanceolate, dilated at the base ; lower flowers com 

 pactly verticillate. 

 HAB. Brackish meadows. Aug — Sept. 0. Stem 

 4-8 in. high, simp, or somewhat branched ; pet. purp* 



2. A.humilis: stem procumbent at the base, branched, 



slender, quadrangular ; leaves lanceolate, alternate 

 at Ihe base ; flowers solitary. 

 HAB. Borders of ponds. Aug. © and $. Stem 

 4 — 7 in. high, rarely simp. ; fl. small, pale purp. 



124. PTELEA. Terebintacece. 



P. trifoliata : leaves ternate ; flowers in panicles 



polygamous. 

 HAB. Shady moist places. June. Shrub 6 — 8 ft. 



high, spreading ; leuv. petiol. ; fl. greenish-white. 



125. RIVINA. Alriplices. 



R. laevis : racemes simple ; leaves ovate, acuminate., 

 glabrous, flat ; stem terete. 



HAB. Pennsylvania ? A shrub with the habit of Phy- 

 tolacca decandra. Fi. in axill. racemes. 



126. ALCHEMILLA. Rosacece. Lady's mantle. 



A. alpina : leaves digitate, serrate at the extremity- 

 white and sattiny beneath. 

 HAB. High mountains. If.. Fl. white. 



127. SYMPLOCARPUS. Aroidece. Skunk-cabbage. 



S. foetida. 



HAB. Swamps and low grounds. Feb. — Apr. If.. 



Plant fetid; leaves large, ovate-cord. ; spath.purp.. 



spotted, cucull. ; spadix pedunc. 



DIGYNIA. 



128. HAMAMELIS. Berberides. Witch-hazel. 



H. virginica : leaves obovate, acute, dentate, cor 



date, with the sinus small. 

 HAB. Moist woods. Oct.— Nov. Shrub 6— 12 ft. 



high; leav. altern. y large ; fl. axill. , clustered, y el L 



