2 KEY AND FLORA 
=] 
~s) 
6. P.dumetorum L. Fause Buckwuerar. Perennial. Stems slen- 
der, twining, branched, 2-10 ft. Jong. Leaves ovate, taper-pointed, 
heart-shaped to halberd-shaped at the base, long-petioled. Stipules 
cylindrical, truncate. Flowers in axillary, more or less compound and 
leafy racemes. Calyx greenish-white, the outer lobes winged and form- 
ing a margin on the pedicel, Stamens 5. Stigmas 5. Akene 3 3- s-onig led, 
black, smooth, and shining. Margins of fie ee and thicket 
III. FAGOPYRUM Hill 
Smooth annual herbs, with more or less triangular leaves ; 
the sheathing stipules cylindrical or funnel-shaped. Flowers 
bisexual, white, greenish or tinged with rose color, in terminal 
or axillary, often panicled, racemes. Calyx petal-like (Fig. 14), 
o-parted. Stamens 8. Styles 5, with knobbed stigmas. Akene 
3-angled, much longer than the persistent calyx (Fig. i4). 
Fie. 14. Buckwheat (Fagopyrum esculentum) 
A, flower; 2, section of flower; C, fruit. (All somewhat magnified.) 
(After Marehand) 
1. F. esculentum Meench. Buckwuear. Annual, nearly smooth. 
Leaves halberd-shaped, 1-3 in. long. Flowers white or nearly so, with 
8 yellow neetar-bearing glands between the stamens. Old tields and 
thickets, escaped from cultivation. Introduced from Europe or west- 
ern Asia. 
26. CHENOPODIACEH. Goosnroor Famity 
Herbs or shrubs. Leaves simple, alternate, without stipules. 
Flowers small, actinomorphie, either bisexual or more or less 
moncecious or dicecious. Calyx free from the ovary. Corolla 
wanting. Stamens usually 5, opposite the sepals. Styles or 
stigmas generally 2. Fruit with 1 seed, usually inclosed in a 
small, bladdery sac, sometimes an akene. 
