J56 OCTANDR1A TRIGYNIA. 



O. vulgaris : leaves ovate, entire, revolute ; segments of the corolla 



oval ; stem filiform, creeping, naked. 

 HAB. Mountain bogs. 1|_. 



189. ACER. Maple. 



A. rubrum : leaves palmately about 5-lobed, cordate at the base, une- 

 qually and incisely toothed, glaucous beneath; the sinuses acute; 

 flowers aggregated in about fives, on rather long pedicels ; germens 

 glabrous. 



ttAB. Woods. April. A large tree; precocious; Jlower reds 

 stamens 5 6. 



A. saccharinum : leaves palmately 5-lobed, subcordate at the base, 

 acuminate, glaucous beneath ; peduncles corymbose, nodding. 



HAB. Woods. April. A large tree; Jlower yellowish, onjilif. ped. ; 

 wings narrmo. 



A. pennsylvanicum : leaves with 3 acuminate lobes, rounded at the 

 base, acutely dentate, smooth ; raceme simple, pendulous. 



HAB. Mountains. May. Shrub 10 feet high; bark striped; 

 Jlower gr. yellow, large. 



A. montanum: leaves somewhat 5-lobed, acute, dentate, pubescent be- 

 neath ; racemes compound, erect. 



HAB. Mountains. May. Shrub 610 feet high ; leaves small ; 

 Jlower greenish. 



190. DIRCA. Leather-wood. 



D. palustris. 



HAB. Woods. April. Shrub 2 feet high, with tough branches ; 

 Jlower and bark yellow. 



TRIGYNIA. 



191. POLYGONUM. Persicaria, &c. 



* Flowers axillary. . 



P. aviculare : stamens 8, styles 3, leaves lanceolate, scabrous on the 

 margin ; nerves of the stipules distant ; stem procumbent, herbace- 

 ous. 



HAB. Fields, &c. May October, ; much branched ; Jlower 

 very small, white or reddish ; seed striate. 



P. glaucum : flowers octandrous ; styles 3 ; leaves lanceolate, thick 

 and glaucous, revolute on the margin ; stipules lacerate ; pedicels 

 exscrted ; stem diffuse, procumbent ; seed acutely angular, smooth 

 and shining. 



HAB. Sandy sea-shore. August, (v) 1 stem long, sub ig. ; Jlower 

 larger than No. 1, rose-colored. 



P. tenue : stem slender, erect, branched, acutely angular ; flowers al 



