454 POLYGONACEAE 
3-3.5 mm. long, smooth and shining aT often saline soil, various provinces, 
Tenn. to N. M., Wash., Sask., and Min 
8. P. e Michx. Plant ei dm. a pe uus wiry: leaf-blades linear 
to on jars 0.5-3 em. long, e ith 2 lateral uv uy on either 
~~ side of e midrib: flowers ae a Mere Dn ing 2.5-3 mm. lon 
achene ovoid, 2.5-3 mm. long.—Dry sandy or rocky soil, various BIO Ga. 
to Tex., Nebr. Minn., rer Ont 
10. TOVARA Adans. Perennial erect herbs. Leaves alternate, not jointed 
at the fringed ocreae. hs in lax remote clusters borne on virgate branches. 
Sepals more or less colored, 4, unequal, the 
2 lateral ones MM the others. Sta- 
filaments slender. Stigmas 2. chene len- 
ticular.—Two species, the following and one 
Japanese 
1. T. virginiana (L.) Adans. Stem stri- 
gose, at least ed the oue , 9—14 dm. tall, 
virgately branched or simple: leaf- lade 
ovate or elliptic to ovate-lanceolate, 3-16 c 
long ip els flattened: per rianth. e 
.0—4 m bp vee aerem d ribbed: MA 
styles bent angle he achene: achene 3.5-4 mm. long, ovoid or 
ovoid-o RE “invested in ne nodding eG i SEED.)—Rich woods and 
aoo hioi pro x nt., an . S.—Sum.-fall.— 
The name ss to the surprising E the ripe achenes fy when 
pressed | ae the thumb nail. In the case of this genus and of the following 
generic segregates from the composite pone? Polygonum, the species recorded 
in Chapman’s ‘‘Flora’’ will be found under the same specific names, unless 
otherwise 20501 ed. 
11. PERSICARIA [Tourn.] Adans. Annual or perennial, erect or spread- 
ing herbs. Leaves M not jointed at the cylindric naked or fringed 
ocreae: blades narrowed at the base or eee! cordate. Flowers borne in spike- 
like panicles. Sepals a or colored, mostly 5, neither i nor keeled. 
Stamens 4—8: filaments slender. Stigmas 2 or sometimes 3. Aec eiu cda: 
or 3-angled, included or the tip merely exposed.— About 125 Bernd Ld, dis- 
tributed.—Spr.—fall, or all year southward.—SMARTWEEDS. GANDER-GRASSES. 
Panicle, or pair of panicles, Ern only: mature perianth 
much longer n the ache I, AMPHIBIAE. 
nr axilary as well as TouisHE often numerous: ma- 
ds Derisnth reaching to about the tip of the achene 
stigmas minute: cotyledons accumbent. II. LAPATHIFOLIAE. 
Ocreae with spreading collar-like edges: leaf-blades of a 
road type: stigmas large: cotyledons incumben III. ORIENTALES. 
AMPHIBIA) 
I. 
Coarse Den with diffuse and widely creeping stems * 
and bran 1. P. Muhlenbergii. 
